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Bridging the Gap to NetZero – Part 2

Hybrid Heating – the validity of gas in future hot water applications

In part one we looked at why you might adopt a hybrid approach to commercial hot water and heating as a route to achieving Net Zero in commercial properties. In this second part, we consider the continued validity of employing existing gas technology… 

There continues to be a call for a wide ban on the deployment of gas boilers in new properties, with a date of 2025 often mooted. Such a ban, though focussed currently only on domestic properties, would no doubt have repercussions for the commercial sector if/and when it comes to pass.  But it is worth noting that ‘hydrogen-ready’ appliances would be exempt from any broad ban, so gas has a role to play in that mix of technologies driving us forward to Net Zero.

According to Mission Innovation (MI), an independent clean-tech research programme, half of the global emissions reductions required to achieve climate targets by 2050 depends on technology that still currently remain at a demonstration or prototype phase. Whilst development continues into the provision of new fuels such as green hydrogen – and we could be looking at at least a decade before this is universally available –  there remain clear cases, especially in terms of reducing running costs,  for retaining existing gas technology for commercial applications. We also recognise that the retention of existing infrastructure is critical for the cost-effective deployment of long term next-generation green technology, especially considering the large scale challenge of retrofitting existing properties.

Since 2015 the wholesale price of electricity has climbed 20%, yet gas prices over the same period are down on average 15%.  The difference between the wholesale market price of electricity and its cost of production using natural gas provides us with the spark spread.

Commercial Air Source Heat Pumps (ASHP).At the time of writing, the spark spread is calculated to be 5.7.  For a heat pump to break even against a 90% efficient gas boiler, the heat pump must demonstrate a COP of 5.15. The Adveco FPI32-6 can exceed this COP, but only at warmer ambient temperatures. Far more realistic is to use seasonal COP, which at 5.15 is beyond the capability of most current generation units. When assessing the efficiency of commercial air source heat pump (ASHP) technology, we calculate the ratio between the electricity invested in order to run the ASHP and its output, this is the COP. The COP can be influenced by a number of factors including the energy needs and energy efficiency of a property, quality of hot water and heating system installation, and once operational, the energy manager’s competency in maximising the system output. We would expect high performing commercial heat pumps to show a COP that range from 2.9 to a very high 4.7 due to variance in seasonal external temperature and heating flow temperature. The average ASHP system will typically exhibit a maximum COP much lower than the necessary 5.15. It is also worth considering that the latest generation of commercial gas boilers will exhibit even greater efficiencies, for example, RP MD Boilers.Adveco’s MD boiler range can achieve a NET combustion efficiency of 106%. This means gas has a key role to play in ensuring a hybrid approach remains cost-effective.

As we progress forward, hydrogen-ready commercial gas appliances (boilers and water heaters) will leverage high efficiency, economic fuel blends with the additional advantage of considerably diminishing the carbon impact of commercial properties.

We see hydrogen playing a valuable role in meeting the needs for heating the UK’s commercial buildings but it will never be a 100% solution. This is why gas appliances in combination with heat pumps remain the best, and most cost-effective to deploy and operate method for commercial organisations to decarbonise operations and drive a low carbon economy.

Whether or not ongoing Government consultation decides to recognise the importance of ‘hybrids’ with financial support, the simple truth is that for the broad majority of commercial organisations looking to refurbish, capital investment and operational costs for heating and cooling systems are a critical decision factor. Hybrid systems offer the best option now and in the longer term as new green gas options come into play

The Hybrid Balancing Act

To truly reap the rewards of a hybrid heating system its energy management system needs to be implemented as part of the smart grid, with flexible electricity tariffs. When electricity volumes increase, prices fall. In a smart grid, when the corresponding price signal reaches the hybrid heating system it will be able to optimise the use of renewable electricity in terms of cost and availability.

In view of the extremely high volatility of renewable energy sources (RES) electricity, there will inevitably be peaks in supply above demand for electricity. In particular, this naturally occurs at high levels of wind and solar radiation. At present, an excess supply of RES electricity is either decommissioned at production peaks or sold. In extreme cases, as has been seen in the Netherlands, this could lead to negative electricity prices. To counteract this uneconomic development, it is necessary to introduce flexible electricity prices and pass them on to customers in order to stimulate production-dependent consumption. If there are high quantities of renewable energy in the grid, a heat pump will supply the building with heating and hot water. In cold phases, the heat pump covers only a part of the necessary heat output in the case of a hybrid system with the condensing gas boiler taking over to cover the remaining heat requirement and, if necessary, provides a higher system temperature.

This load management, the smart balancing of heat pump and condensing boiler operation, not only addresses the lifetime cost of operating a system it can help with the support of grid capacity (with fiscal remuneration if selling electricity generated), stabilisation of reserve capacities and potentially reduce the need for grid expansion.

The ability to provide greater efficiencies through smart metering and the use of flexible electricity tariffs to reduce operational costs for a lower total cost of ownership across the lifespan of the system is advantageous. The opportunity to impact load management across the grid however is a real game-changer for businesses being held up as a major guilty party when it comes to the continued generation of greenhouse gasses. Hybrid systems, therefore, offer a fast, cost-effective and realistic means to address ageing and environmentally unfriendly heating systems.


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Bridging The Gap To Net Zero – Part 1

Hybrid Heating – A Practical Response For The Commercial Built Environment

Adveco looks at the changing face of commercial hot water & heating, and the increasing importance being placed on the development of hybrid applications to address the real-world challenges of achieving carbon reduction levels set by the government through to 2050.

Around 40% of UK greenhouse gas emissions are accounted for by heating, cooling, ventilation, the provision of hot water and lighting the built environment, and, according to 2019 figures issued by the Department for Business, Energy and Industrial Strategy (BEIS), business remains the third-largest emitter at 17%. In order to achieve climate-neutral building stock by 2050 commercial organisations need support from the industry to provide immediate and practical measures.

Through the expansion of wind power and photovoltaic systems, the generation of electricity from renewables and the importance of electricity in the heating market is increasing, but natural gas still dominates. As attention shifts to a mix of district heating, heat pumps, wind and solar energy, studies show that over the next two decades renewable electricity will be crucial to the energy supply in the heating market.

That said, there remain strong differences with regard to the expected share of renewable energy supply. Independent research clearly argues for a multi-dimensional approach with an energy mix consisting of renewable energy and gaseous fuels with a high share of renewable energies. Studies that are more “almost all-electric” argue in favour of almost complete dominance of the heat pump, while the technology-open scenarios also predict large proportions of heat pumps, but also assume the use of gaseous fuels.

Just as electricity is becoming greener, via an ever-increasing share of renewable energy, so too over time will the gaseous fuels such as ‘green’ hydrogen gas and synthetics.

Why Take The Hybrid Route?

So, let’s consider the advantages of the hybrid approach. This, at the most basic for heating systems, consist of two heat generators, of which at least one is operated with renewable energies and one with fossil fuel. Often, a hybrid heat pump system consists of a heat pump (air source) designed for a system part load (baseload) and a gas condensing boiler for peak load, for example during the cold, dark winter months. In a fully hybrid heat pump system, both heat generators can cover the entire heating load, where the energy sources can be freely selected according to definable criteria including efficiency, emissions and price.

Commercial Air Source Heat Pumps (ASHP).

Compared to a conventional combustion heating system though, there will be issues of logistics and space requirements, but as hybrid systems are particularly relevant to buildings in which there is already a gas connection this is generally less of a concern. That said, a hybrid system will require two heat generators and two energy connections, one of which is an environmental heat source. This leads to higher complexity of the plant, requiring more effort and expertise from the system designer, supplier and installer. This all leads to higher CAPEX cost. It is typically estimated that the purchase and installation of a hybrid heating system compared to a pure condensing heating system is going to drive initial costs up by approximately 50 to 60%. So, what are the advantages that outweigh these initial costs?

For older commercial properties where a new heating system is required, but wider renovation is either not feasible or required, a hybrid system can control and avoid issues of project congestion when refurbishing, as the heat pump is used to supplement the pre-existing fossil-based heating system.  This helps to save costs as existing boilers can continue to be operated on the currently installed heat distribution, heat transfer and flue systems while the heat pump can benefit from an advantageous coefficient of performance (COP) in the right conditions and setpoints.

A hybrid heat pump/gas boiler system is able to reduce the maximum power consumption of a system by smartly balancing the heat generators for greater efficiencies and lower operational costs whilst guaranteeing high system temperatures to ensure the comfort of those still living or working in the building during refurbishment work. If the hybrid system is also equipped with a buffer tank and domestic hot water (DHW) tank the heat pump can achieve a high proportion of cover for space heating and DHW heating increasing the profitability of the system.

A hybrid heating system cannot only be controlled cost-effectively but it can also be optimised for CO emissions by selecting the optimal (ecological) heat generator whenever possible via an energy management system that incorporates smart metering.

Hybrid systems for commercial properties will typically be planned according to individual project requirements. In cold phases, the heat pump in the hybrid system can only take over part of the heating load due to the design. If necessary, the condensing boiler, especially on cold, dark days with high demand, but a limited supply of renewable energy, completely covers the heating load.

This versatility enables the energy manager to react to price fluctuations, especially in the power grid and possibly also in the gas grid.

Should the building envelope subsequently be renovated, the required heating load decreases and the existing gas boiler can take on less of the annual heating work or eventually could be put out of operation.

In part 2 we consider the continuity of using gas for future hot water applications

m-CHP and the Future of Cogeneration

In 2015, Adveco embraced the potential of cogeneration and in particular micro-CHP (10, 20 & 25kW) as a carbon-reducing and cost-effective way to generate electric power from gas, whilst reclaiming otherwise wasted heat which could be used to heat water or space and thereby offset costs. Five years ago, the UK grid was still dependant on the burning of fossil fuels to generate a proportion of its electricity, making local cogeneration not only attractive but a considerable help for consultants seeking to reduce carbon emissions to pass Part L for their building.

Today, we are evaluating the relevancy of m-CHP technology for the UK market. The concerted effort to clean the grid has been especially successful, with the removal of coal-burning and the increased input from renewable energy sources. This has dramatically impacted the advantages of micro-CHP, under SAP10 which establishes the acceptable figures for carbon intensity. The recent revisions under SAP10 have shifted m-CHP as a technology, from carbon positive to carbon neutral and, most recently, negated any previous advantages m-CHP units offered in terms of reducing carbon.

The ultra-low emission of NOₓ remains market-leading. We are proud to have raised the issues around its production, which is now being recognised more widely for its potentially deadly and certainly damaging impact on the population’s health.

Despite the loss of carbon advantage, M-CHP, with its advanced heat recovery technology still had a valuable contribution to make in terms of reducing OPEX of commercial heating and DHW systems, especially given the fuel prices. While electricity costs have risen, gas prices have fallen.

Local initiatives such as the London Plan which is seeing widespread adoption across UK cities and the latest Government drive to address the adoption of sustainable energy within buildings have proven detrimental to several technologies, including CHP.  Larger ‘dirty’ CHP has been rightly targeted by these plans, but this activity has also undeservedly had an impact on the selection process for m-CHP. With the Government’s ongoing focus on electricity and heat pumps, we must recognise the significant impact that has on the OPEX of m-CHP.

Looking forward, we have taken the hard decision to suspend the provision of m-CHP within our application designs and will no longer be selling the compact TOTEM m-CHP units. As a business, we will continue to operate the service contracts on the units already installed, and our expertise remains available to consultants who still require CHP for their project.

Single non-micro-CHP units of 50 – 100kW+ remain carbon neutral and savings at this scale can be considerable. As always, Adveco treats its projects as bespoke. The application design and sales teams can advise on best options and, where needed, be able to support the supply of CHP units from 20kW up with full manufacturer grade engineering and warranty support.

In absence of m-CHP in our product portfolio, we will default to hybrid gas or electric systems that leverage the high-efficiency advantages of Air Source Heat Pumps (ASHP). We will expand our offering with new appliances in the FPi range and have introduced the new L70 ASHP for larger-scale commercial applications.

Despite mixed messages to the commercial sector, the Government has confirmed additional investment in the development of hydrogen as a route to decarbonising the gas supply in the UK. Expectations are for an initial rollout of a hydrogen/natural gas blend by the middle of this decade with national expansion and purer hydrogen blends to begin from 2030 through to 2050. Under such an energy supply model, the opportunities for gas-powered m-CHP again look favourable. Adveco will continue to dedicate itself to identifying and supporting the provision of hydrogen ready m-CHP at such a time that the gas supply infrastructure and quality of the appliance make the reintroduction of the technology meaningful for our customers.

It’s A Fair COP – Specifying ASHP in the UK

As a specialist in the design and provision of domestic hot water (DHW) and heating for commercial projects, Adveco is especially conscious of the need to correctly size and rate appliances for what are typically bespoke system designs. When specifying Air Source Heat Pumps (ASHP) for UK commercial projects, correctly establishing efficiency and calculating reductions in CO2 emissions is perhaps the most important element, given their specification for sustainability is increasingly a major facet of the investment in a building’s Heating, Ventilation and Air Conditioning (HVAC) systems.

Adveco has now extended its range of commercial ASHPs with the introduction of the Adveco L70. This high-capacity air-to-water monobloc heat pump is designed for the UK climate providing hybrid domestic hot water (DHW) and heating. In conjunction with Adveco’s bespoke application design, the L70 offers a comprehensive response for sustainable heating and hot water, providing high-efficiency, low-emission, low cost to operate systems for the life of a commercial building.

Rated 70kW for typical UK operation at 5°C but climbing to a maximum 90 kW from a single compact unit, and with a Seasonal Coefficient of Performance (SCOP) as high as 4.08 the L70 is perfect for large scale commercial applications and can operate as part of a cascade installation for projects demanding greater capacity.

With ASHPs offering greater efficiencies in low-temperature systems, the high-temperature demands of commercial DHW applications can be a challenge. Achieving working flow temperatures up to 60°C, the L70 supplies preheat for hybrid applications composed of combinations of plate heat exchangers, buffer vessel, with calorifiers, gas-fired boilers or direct-electric water heating providing essential additional heat to meet commercial requirements.

When analysing the value of an ASHP in terms of reducing CO2 emissions Adveco employs the carbon intensity figures from the new SAP10, with like-for-like calculations for 1 kWh of output, benchmarked against a modern, high-efficiency gas-fired system. When describing the efficiency of an ASHP, working flow water temperatures of 35°C are typically cited, but it needs to be recognised that this is insufficient for commercial applications. Even if a commercial building has achieved Passivhaus standards 35°C is not going to be hot enough to safely provide DHW. For this reason, Adveco recommends calculating emissions at a working water temperature from the ASHP of 55°C, this is then hot enough to provide realistic levels of preheat for a commercial hybrid DHW system.

Additionally, attention needs to be given to the Ecodesign established European temperature zones when calculating real-world figures. For most of the UK, the relevant defined temperature zone is ‘average’, where the lowest annual reference temperature for the ASHP’s SCOP is taken to be -10°C. For some Southern and Western UK regions, the ‘warmer’ Ecodesign temperature zone can be applied for calculation, where the lowest the reference temperature will only fall to 2°C. So give consideration to a project’s location when assessing potential reductions in CO2 emissions from the inclusion of ASHP in an application.

Designed to operate between 20°C and +35°C, Adveco’s L70, at -10°C can still easily generate working water temperatures of up to 55°C and will reduce CO2 emissions by almost 63%. Under the warmer climate zone’s conditions emissions can be reduced by almost 70% using a SCOP of 3.47.

Able to draw and transfer thermal energy from the air, under the right circumstances ASHPs represent an efficient way to significantly reduce the carbon emissions of a building. This does come at a higher price point compared to traditional gas-fired systems, so this can be an impediment to their adoption if sustainability gains alone are not enough.

Discover more about Adveco’s growing range of Air Source Heat Pumps

2021 – Adapting to new technologies and approaches

The UK’s construction industry is familiar with adapting to new technologies and approaches to provide the latest and most efficient responses for creating better buildings.  2020, however, was unprecedented, but what does this mean for 2021? Looking forward, key trends within the industry include Covid-19 care, greener response sand efficient use of property space.

Coronavirus has attacked every corner of the UK, impacting the majority of businesses and therefore the wider economy. Despite vaccines, Covid-19 is now something we all must learn to live with, it has accelerated change and requires a re-evaluation of how buildings are conceived and used. As a specialist in the provision of commercial heating and especially hot water, Adveco is well versed in the design of systems to support the maintenance of hygiene within their buildings, critical for the ongoing prevention of the spread of Covid-19. There has never been a greater need for access to wash stations. Scientists have proven washing hand in warm, soapy waters for more than 20 seconds can reduce the spread of Coronavirus more efficiently than hand sanitisers. Additionally, hot water (at a minimum of 60°C) needs to be readily available for cleansing of materials and surfaces to prevent the spread further. With these requirements comes a need for more efficient systems capable of meeting these increased demands to be incorporated into commercial buildings. With the demands of maintaining a safe two-metre distance, space has become even more valuable. The hospitality sector is already struggling with the challenge of balancing revenue losses from reduced covers and are looking at how to create alfresco spaces to adapt to this new normal. Packaged plant rooms offer companies a means to use minimal space whilst still maximising efficient systems, freeing up valuable internal spaces or making use of dead spaces which are not customer friendly. This is also a fast, relatively low impact method for refurbishing hot water systems.

Despite all the chaos of Covid-19, it also brought into razor-sharp focus the effects of pollution. This was all too obvious when the world stopped for a moment and the effects of pollution decreased and allowed the environment to thrive. It proved to be a rallying cry for decarbonisation in 2020 and will continue to create headlines throughout 2021 and beyond. It remains a core focus for the construction and HVAC industry that will continue to strongly push for more wide-reaching frameworks to deliver eco-friendly technology and buildings to meet the challenging goal of achieving Net Zero by 2050.

Through exclusive technical partnerships and our in-house design function, Adveco can quickly adapt to these changing needs and help innovate products and systems to directly address the evolving challenges of decarbonising commercial buildings. We recognise that there is no single technology that delivers the entire answer, but there is no doubt Air Source Heat Pumps (ASHP) will play an important part, as will new green gas technologies towards the end of the decade.  This makes hybrid system approaches all the more valid for supporting the near-term transition of commercial organisations to a more sustainable track that reduces their building emissions and operational costs.

Navigating Regulations & Application Design for Commercial Hot Water Systems

There are huge expectations placed on building services engineers and sustainability consultants to be experts on the regulations for the built environment and the ever-developing technologies employed to meet them. The most important systems and features of the building, such as its fabric, power, heating and cooling systems are well understood and can be confidently dealt with when specifying and delivering a project. Designs including non-traditional and secondary systems are where engineers can be at a disadvantage due to the vast amount of changing information that they need to know. These systems can include domestic hot water (DHW), renewables plus the control of them, and gas appliance flueing.

These secondary systems on commercial projects are therefore a perfect opportunity to lean on more specialist application design services so that consultants can place their focus on the mainline elements of a building project. At Adveco, we have supplied specialist design support for the past 50 years, ensuring typically bespoke applications meet regulatory demands and best practice to sensibly manage capital expenditure while ensuring system longevity for better operational life.

In recent years we have come to recognise three prime ways that specialist application design becomes truly advantageous to a commercial building project. The first is in supporting mechanical and public health engineers deliver comprehensive and highly efficient DHW systems. The second is aiding sustainability consultants in the integration of renewables. The third is in helping engineers and D&B contractors to address the complex regulations surrounding the installation of flues for gas-based systems.

With DHW applications the primary issues are always going to relate to correct sizing based on the demands generated by a building’s occupants and choice of system. These can be based on application, energy source, suitability, and integration with carbon saving technologies,

Oversizing DHW systems inherently come from a lack of understanding of hot water demands within the building, diversity, and length of the peak period. Oversizing is exacerbated by the false belief that the building uses more hot water than it really does, and an attitude of ‘better too much than not enough’. Sizing programmes, often employed for a quick sizing early in the design then never reviewed, do not deal well with the many variables and decisions on diversity leading them to oversize to prevent hot water problems. Traditionally the problems with oversizing, such as increased standing losses, increased outlay costs, increased pipe sizes, and increased space use may have been minor in terms of the cost of the whole building, but it now has another important knock-on effect. If the hot water consumption is overinflated, it falsely increases the expectation of the building’s carbon emissions. This then requires greater employment of renewables to reduce emissions which do not actually occur. This can come at great cost and complication and provide little benefit to the building. Access to realistic sizing tools and having the experience to interpret results requires both expertise and time, which specialist application design can bring to a project.

The integration of renewables, such as commercial air source heat pumps (ASHP), heat recovery and solar thermal, will further increase the complexity of a system. Renewable technologies are going to be selected early in the design process to secure the Part L approval, once modelled successfully it is not wise to start changing things too severely. Small changes, such as revising the manufacturer of an appliance is going to make little difference within Part L, but if you have to add, remove and replace a technology, then you are going to be back at the beginning, and will almost certainly need to resubmit your Part L calculations. These early selection decisions increasingly reside with the sustainability consultant before the design engineer is involved, which means they need a broad knowledge of building services systems beyond the renewables themselves. Working together with specialist application design means they can better advise on selecting the right type of renewable to ensure it will integrate with the rest of the system and be controlled to work with traditional technologies. It is very important that renewable heat sources, particularly those that provide low-grade heat, are not held off by traditional boiler systems providing high-grade heat to high-temperature systems. This is not purely a controls issue but one that requires an in-depth understanding of the complete system arrangement to set it up effectively.

Finally, a regulatory issue that continues to impact consultants, engineers and D&B contractors has been the change to flue and gas standards.

IGEM/UP10 Edition 4 is an Institute of Gas Engineers and Managers utilisation procedure which attempts to address two major points of confusion: safe horizontal termination and the definition of a group of appliances. Adveco applies this document in all relevant plant room design since limits on horizontal termination through a wall terminal at low level is clearly important from a safety perspective. Many designers and installers remain unsure how to apply it correctly which can have a major impact on commissioning if the termination is not found to meet the current regulations.

Under UP/10, groups of terminals are defined by a mathematical formula which sets a corresponding dimension. Terminals that are within the calculated dimension of each other are k,89a group regardless of type or location. A group of terminals with an input over 70kW (net) that terminate horizontally must now be tested against a risk assessment provided within UP/10; this could therefore include terminals from appliances with outputs below 70 kW that previously would not have been considered if their terminals conformed to BS5440. The IGEM procedure will potentially allow up to 333kW (net) to be exhausted at low level if it is deemed risk free (such as a windowless wall looking over open fields) but will not allow 70kW to be exhausted at low level if deemed unsafe (such as an internal corner, or adjacent to openable windows, walkways, or a playground). Despite holding British Standard (BS) equivalency and being published for more than five years, UP/10 remains underused in the early design phase where it should be used to determine when flues must terminate at high level so that they can be included in the installation budget.

Faced with an ever-widening range of technology and regulations, access to a specialist design for these secondary systems is an extremely useful asset, one that can be both an independent sounding board and an extension of the in-house design function. That saves valuable time, delivers a better project specification and helps avoid problems that can halt final commissioning of a system, delaying or even preventing a building’s final handover to the new resident.


Enquire about sizing your projectNavigating Regulations & Application Design for Commercial Hot Water Systems.

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UK Needs to Cut Emissions by 78% by 2035 to Meet Net-zero

Under the original Climate Change Act, the UK pledged to cut net emissions by 80% by 2050. Now, it will need to deliver a 78% reduction by 2035 if it is to meet its long-term net-zero commitment. That is according to the Climate Change Committee (CCC), which has published its Sixth Carbon Budget for the period between 2033 and 2037.

The CCC described the budget as the toughest yet with chief executive Chris Stark saying that the UK will need to decarbonise at a faster pace in the next 30 years if the net-zero target is to be met. Stark explained that the Committee has deliberately opted to ‘front-load’ decarbonisation – more will need to happen in the 2020s and the earlier half of the Sixth Carbon Budget period than in the latter half and the 2040s. Heat, and the broader decarbonisation of buildings, is one of the major priorities identified by the CCC which has based its calculations on a scenario in which 40% of the emissions reductions needed will be delivered using pure-technology solutions.

The new recommendations will see heat supply drastically transformed from its current reliance on natural gas if the country is to decarbonise all aspects of the UK’s infrastructure and economy. The budget has set a mandate for fossil fuel boiler installations to end across the UK entirely from 2033, with fossil fuels phased-out from heating in public buildings by 2025 and in commercial buildings by the following year. It added that these stricter targets to phase out higher-carbon technologies in public buildings would also support a government aim of realising a 50% reduction in emissions by 2032. The 2033 date has been set to take account of the typical 15-year turnover of boiler stock, while also allowing for the scaling-up of supply chains to deploy heat pumps at a mass scale.

The recommendations aim for 37 per cent of public and commercial heat demand to be met by lower-carbon sources as of 2030.  According to the CCC, heat pumps should cater for 65% of the predicted need, 32% of heat should be provided by district heating systems, whether low or high-temperature supply, with a further 3% from biomass by the end of the current decade. By 2050, CCC estimates that 52% of heat demand should be met by heat pumps, 42% from district heat, with hydrogen boilers covering the remaining 5% of national demand.

One caveat, however, was that since the dates operate alongside the deployment of low-carbon heat networks and planned regional rollouts of hydrogen conversion of the gas grid, the phase-out outlined may not apply in any areas designated for these alternatives. This makes a nod to a net-zero that derives balance between pure hydrogen systems and electrification, both delivering decarbonisation of heating. It also highlights the danger of supporting one technology and ignoring another when the pace of development is so much steeper and will continue to be so as we move towards 2050. To this end, the CCC is using what it describes as a ‘balanced pathway’ scenario upon which to base its calculations and that its delivery will require ‘systems change’ and a ‘whole economy approach’ to decisively meet the UK’s legal target of fully eliminating and offsetting carbon emissions by 2050.  Under this ‘decisive’ decarbonisation plan, the CCC has warned that a sizable majority of change must be made within 15 years.


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Space To Develop Hot Water & Heating

Space To Develop Hot Water & Heating

How relocating heating and hot water systems in commercial buildings can drive real value from underutilised space…

The most valuable asset any business or organisation has is space, space to grow, develop and drive advantage. Within the built environment the drive for more space is a balancing act between granting applicable and preferably comfortable space for those using the building and meeting the infrastructural and systemic needs of operating the building.

There typically has to be some kind of give in the drive for creating or freeing up useable space if that activity impacts on the necessary systems, in particular heating, cooling, lighting and water.

Hotels are a great example of this drive to reclaim usable space. The hospitality industry is one of the most competitive there is. Hotels are continually fighting with the competition to offer the most affordable rates, the best amenities, and the most outstanding guest services — all while also making a profit. The easiest way to charge more for a room is by adding space to it, or by adding more rooms in total. Either way that is going to help improve the bottom line. The same goes for restaurants, where maximising floor space means more tables. Whilst hoteliers and restaurateurs will look to every square centimetre of their properties for opportunities to maximise revenue, other organisations will have very different drivers. Consider schools, where larger class sizes have increasingly driven a demand for teaching space. How many schools have had to surrender playing fields to locate portacabin style classrooms which are obviously not ideal?

This brings us to the kinds of underutilised or wasted ‘dead’ space in and around buildings. Internal space is potentially incredibly valuable, so leveraging external space to free it up can be truly advantageous. The question is what can be given up to makes such gains? The simple answer might be your HVAC plant.

Plant rooms, or boiler houses as they were known, vary from purpose-built to jury-rigged spaces used to accommodate heating and hot water systems. Basements are typically repurposed in older commercial buildings, whilst it is not unusual to find them tucked in amongst other rooms creating a mixed-use setting. Wouldn’t it be advantageous to separate such building services and relocate them away from those using the building whilst improving the efficiency of the system for a host of benefits including lower operational costs and reduced emissions?

Simply upgrading to a new gas condensing boiler or electric water heater can deliver notable efficiency improvements over models from just 10 years ago, and today’s modern appliances pack that into much more compact, space-saving formats. So, you could gain greater capability from a smaller footprint in your plant room, and potentially reclaim a few square meters. But what if you could reclaim the entire plant room?

Refurbishing plant to a new location may sound drastic, but that needn’t be the case. Increasingly the construction industry has embraced the idea of offsite construction, creating modular units or systems that are pre-installed and ready for relatively quick and simple connection once delivered to a site. The process streamlines a construction programme along with offering numerous savings as site work is dramatically sped up. Now, this process can be as easily applied to refurbishment projects as it is to new build. All you need is an underutilised space. For many commercial buildings that means flat roofs, yards or car parks, spaces that are inexpensive to adapt, require low to no maintenance and have either been ignored or are underused.

With the proliferation of car ownership, it might at first seem unlikely that the car park is being underused. But the drive to encourage walking, cycling and car-sharing has had an impact, and developers who have previously pushed for more open parking space than ever before are now being challenged to repurpose some of that space. In terms of Identifying functional opportunities to better leverage this space, the siting of plant fits the bill. Turing over just one or two car spaces can have a dramatic impact on the capability of heating system, providing enough square meterage to easily accommodate a mid-sized packaged plant room offering, for example, a boiler cascade and heat exchanger assembly. Or the space could be used to locate Air Source Heat Pumps (ASHP) that drive system sustainability whilst lowering CO2 emissions.

Relocation to flat rooftops is especially valuable. This is truly ‘dead space’ for most buildings, but it provides a broad opportunity to relocate heating and hot water plant safely and more securely. A simple crane lift is all it takes to locate a prefabricated plant room, and these can be of considerable size and complexity should the roof space be large enough to accommodate. Additionally, the space lends itself to locating hybrid systems that integrate renewable and sustainable technologies. We have already mentioned the use of ASHPs, and a rooftop placement not only typically supplies unimpeded airflow, the noise, though relatively low, now becomes almost unnoticeable to those on the ground.

Flat roofs are also perfect for the installation of solar thermal systems, where a framework is constructed to align the collectors for optimal energy collection. That energy is then transferred to the building’s water system. One of the biggest threats to the efficiency of a solar thermal system is the heat loss between the collector and hot water storage, which results from potentially long pipe runs from the roof to the plant room. By locating the plant room on the roof, pipe run is minimised as are thermal losses, so you get more energy for your investment.

These are just a few examples of where Adveco’s application design, system prefabrication and expertise in hybrid and renewable technology can help maximise underutilised space. Modern, high-efficiency systems deliver new versatility for addressing changing demands of the building whilst still reducing operational expenditure on energy and helping drive actual sustainability within an organisation.

If your business or organisation is looking to

Talk to us today or read more about our renewables and packaged plant room systems.

Government Outlines Ten Step Plan In Drive Towards Net Zero

Prime Minister Boris Johnson has announced a £4bn package to:

“Create, support and protect hundreds of thousands of green jobs, whilst making strides towards net zero by 2050. Our green industrial revolution will be powered by the wind turbines, propelled by the electric vehicles and advanced by the latest technologies, so we can look ahead to a more prosperous, greener future.”

The plan is wide-ranging, with a clear focus on creating jobs and addressing climate change at the same time, but many have challenged the allocation of funds needed to deliver on the challenge.

The Prime Minister’s plan outlines ten key deliverables:

  1. Produce enough offshore wind to power every home in the UK, quadrupling how much it produces to 40 gigawatts by 2030.
  2. Create five gigawatts of ‘low carbon’ hydrogen production capacity by 2030 – for industry, transport, power and homes – with the first town heated by hydrogen by 2030.
  3. Making homes, schools and hospitals greener, warmer and more energy efficient, including an aggressive target to install 600,000 heat pumps every year by 2028.
  4. Accelerate the transition to electric vehicles by phasing out sales of new petrol and diesel cars and vans by the end of the decade.
  5. Advancing the provisioning of nuclear power as a clean energy source, with new plant likely to be located at Sizewell and a new generation of small nuclear reactors.
  6. Invest in zero-emission public transport for the future.
  7. Support projects researching zero-emission fuels for planes and ships.
  8. Develop carbon capture technology with a target of removing 10 million tonnes of carbon dioxide by 2030.
  9. Plant 30,000 hectares of trees a year.
  10. Create a global centre of green innovation and finance based in the City of London.

Business Secretary Alok Sharma has stated that the announced £4bn investment is part of a wider £12bn package of public investment, but to put that sum into perspective, Germany has already committed to a €7bn investment in hydrogen alone to deliver a filling station network and create a hydrogen-powered train.

Concerted efforts to further decarbonise the grid through offshore wind, nuclear power and a further a subsidy of up to £500m to develop hydrogen production, partly by excess energy from offshore wind, will continue to impact on the way new and replacement commercial heating and hot water systems will be designed. But there remains little indication of how these investments in the green economy will directly support commercial organisations coming under pressure to address ageing, inefficient systems. The Government failed to gauge the scale of demand from domestic sites with the Green Homes Grant, and this plan has extended that support for a further year to attempt to address the over-subscription already seen, and the same can be said for businesses that are facing a short timeframe to secure non-domestic RHI support, without a clear replacement being announced. The initial propositions for replacement commercial Green Grants, being excised.

The drive to see the installation of 600,000 heat pumps a year by 2028 is again a domestic focus, although hospitals and schools have been quoted in the same breath, and no doubt additional public sector funding is going to be extended to drive this adoption. But it is worth remembering that the demands and complexity of a commercial system based around a heat pump is decidedly more complex than a domestic installation. Even now, the domestic market is struggling to identify where the large number of competent, approved installers for these hundreds of thousands of heat pumps is coming from, and that scenario will be more deeply felt in the commercial space. The lack of provisioning for large scale retraining of installers is concerning, and again a failure to show support for commercial organisations that are increasingly being mandated to demonstrate clear and real investment in sustainable and low carbon technology seems to be a critical oversight. Especially given the percentage of emissions building stock contributes each year.

Labour MP Alun Whitehead, shadow minister for Business, Energy and Industrial Strategy, has stated that a mixed approach encompassing different technology types such as electric and gas solutions was the way to ensure heat decarbonisation.

“We believe in speedy progress on heat decarbonisation, but we need to see a horses for courses approach. This would include heat pumps – or hybrid heat pumps where appropriate – particularly in new build and off-grid properties; district heating islands in more urban areas; and a substantial expansion of green gas (bio-methane and hydrogen) in the system.”

The Labour Party expects gas heat, specifically from boilers modified for greener fuels, to be an essential part of the decarbonisation of UK buildings. Labour’s Green Economic Recovery strategy hints at the importance of hydrogen, and in sourcing greener hydrogen produced via electrolysis, for transforming how buildings get their heat. It also highlights the need to retrain workers and create new roles around greener energy and infrastructure, as well as supporting businesses to become more sustainable.

There remains a year until the COP26 UN summit, to be hosted in Glasgow, anticipated by many to be the most critical since the Paris Agreement in 2015. That gives twelve months to further define objectives and provide a clear path with meaningful inducement for the commercial sector if the increasingly aggressive timetable is to be met. The previous carbon budgets set by the government have been achieved, but the ‘easy wins’ are now behind us; future carbon budgets are no longer on track to be achieved and it will only get more difficult. This ten-point plan, should be seen as encouraging, establishing a more defined set of targets for the nation, but greater clarity is required and much still needs to be done in terms of ensuring their practical delivery.

Talk to Adveco today about how you can leverage renewables including air source heat pumps, solar thermal and heat recovery to drive sustainability within your commercial hot water and heating systems.

Time for Air Source Heat Pumps (ASHP).

Time for a Switch to Air Source Heat Pumps

Heating and hot water account for around one-third of the UK’s carbon emissions, so it is not surprising that it continues to receive a considerable amount of scrutiny, especially from those in power.

In 2016, the UK along with the world’s other leading economies signed the Paris Climate Accord, committing to keep global warming under 2°C. As a result, and in order to meet the target, a series of objectives have been set, a crucial one being a commitment to become carbon neutral by 2050, as advised by the Committee on Climate Change (CCC).

The government is taking decarbonisation seriously and the switch to air source heat pumps  (ASHP) seems to be something they are eager to encourage, for both commercial and multiple occupancy residential properties.

Commercial heating – A Renewable Re-invention

In 2016, a study revealed the fact that 14% of carbon emissions can be attributed to industrial processes. This is in addition to the heating and hot water demands being met by the burning of fossil fuels.

With air source heat pumps offering very high efficiencies under the right conditions, retrofitting commercial properties will make a considerable dent in current emissions, helping that all-important carbon-neutral goal to be achieved on schedule.

Yet convincing commercial organisations to adopt something new is not always the easiest job. With upgrades comes a cost, but something so fundamental as hot water and heating offers a business case for it to gain sufficient support.

Additionally, there are many practical benefits to switching to high-efficiency heat pumps, reducing energy consumption means less CO₂ production and lower operational costs, and don’t forget your company gets all the kudos it deserves for going green.

With that said, here is a summary of all the potential advantages of your company adopting heat pumps:

#1 Reduce CO Output, Earn Green Kudos

Quitting your company’s sole reliance on a gas-based system can drastically cut your CO₂ emissions. Heat pumps produce heat without emitting any CO₂, and the small amount of energy required by a unit from the electric grid is increasingly becoming decarbonised. So, advertising the fact that your company working towards attaining net-zero is a brilliant way to show you are playing your part.

Many people do care intensely about the green agenda, so many people like to see the companies they use showing their support and decarbonising their operations, so advertising the fact that you have gone green is sure to impress.

#2 Reduce Operational Energy Costs

For many organisations, the energy bill can be a contentious issue. There is a struggle between keeping energy costs down, while at the same time, maintaining a working environment where staff and visitors feel warm and comfortable.

Under the right conditions, heat pumps offer an extremely efficient alternative for heating or providing hot water to a building. Heat pumps have a negligible demand for electricity and instead of burning carbon-rich fossil fuels to produce heat, using the principle of vapour compression, a heat pump utilises the heat that already exists in the environment. Escaping the reliance on fossil fuels means you are no longer at the mercy of unplanned for cost increases, allowing those resources to be directed to a more rewarding part of your business.

#3 Public Sector Decarbonisation Fund

For public sector organisations, the Governments new Public Sector Decarbonisation Fund is a £1b fund being made available now for the upgrade of public buildings and social housing to make them more energy-efficient and environmentally friendly. As with all current Government decarbonisation initiatives, ASHPs are perceived to have a key role in attaining change that is rapidly required from both new build projects and more critically ageing building stock. The latter especially throw up a range of physical and technical challenges when it comes to adapting or upgrading to new, more efficient systems. Therefore, it is critical to speak to experts, such as Adveco, early on when it comes to scoping out a project and agreeing an application design which delivers on the criteria established under the Decarbonisation Fund.

#4 Adaptability

Heat pumps offer maximum versatility, being able to be installed into a variety of building types and sizes. For larger-scale commercial applications, the annual fluctuation in efficiency due to shifts in ambient temperature, and the peak and high-temperature demands of commercial domestic hot water (DHW) systems means hybrid approaches that combine ASHP with secondary heat sources (gas or electric) are most likely to be required. Despite the potential complexity, the versatility of the ASHP enables it to be integrated in a variety of ways that meet the typically bespoke requirements of such projects.

Whether you have a large single building, or several smaller buildings, a school or medical centre with a substantial heating or hot water needs, heat pumps can help meet the unique demands of the site.

#5 Minimal Upkeep 

Air source heat pumps which have been correctly specified to the regional climate will provide consistent operation absorbing heat from the air throughout the year. For the UK, Adveco will size units based on the Ecodesign Average European Temperature Scale, which sets a minimum reference design temperature of -10°C. This allows for the realistic calculations of Seasonal Coefficient of Performance (SCOP). That said, units will still efficiently operate down to -20°C, and many southern and western regions of the UK exhibit much warmer climate.

Despite continually operating at often sub-zero temperatures during the colder months, heat pumps require very little maintenance and, of course, there is no risk of carbon monoxide, CO₂ or NOₓ from the appliance. Smart, remote monitoring ensures any potential issues are quickly flagged and attended to, and if serviced regularly, a heat pump can easily last as long as 20 years

Time to Consider Changing to Air Source Heat Pumps (ASHP)

Heat pumps are repeatedly cited in government documentation, so their adoption will no doubt be incentivised. Making the switch to ASHPs offers a variety of benefits for commercial enterprises and public sector organisations, meeting the obligations for sustainable investment and ‘greening the brand’, but it also helps your organisation to maximise its operational budget.

The commercial and public sectors are going to be a key part of the UK achieving its carbon-neutral goal by 2050. There has never been a better time to adopt the technology and reap the rewards of renewability.


Adveco: Time for a Switch to Air Source Heat Pumps (ASHP).To request a meeting with Adveco to discuss your project call us on 01252 551 540 or use the form here.

This blog was co-authored with boilerbrain.