Tag Archive for: DHW

Adveco AD Wall-Mounted Water Heaters For Commercial Properties

  • A range of three compact commercial semi-instantaneous gas condensing water heaters
  • Perfect for applications requiring direct contact with soft and softened water
  • Compact and smart for no-nonsense installation and maintenance

Commercial hot water specialist Adveco, announces the Adveco AD range of high-efficiency condensing gas-fired wall-mounted water heaters. Designed to provide a compact, high capacity and reliable method for delivering instantaneous hot water to a building, the new range consists of three models, the AD16 (27kW rated heat output), AD22 (33 kW) and AD37 (61 kW).

The AD is a range of ‘A’ class energy-efficient wall-mounted water heaters, with a net efficiency of up to 107% for the production of domestic hot water (DHW). With an efficient pre-mix burner and minimal NOₓ and CO emissions, the AD range is an eco-friendly way to serve a DHW system. Featuring a high 1:8 modulation ratio, wall-mounted ADs ensure maximum efficiency even during periods of low demand.

The wall-mounted water heater features a single high-quality patented heat exchanger constructed from a continuous, non-welded run of  AISI 316Ti titanium-stabi­lised stainless steel, providing exceptional construction strength and corrosion resistance. The brand-exclusive three-pass design features large bore, circular tube cross-sections that reduce the collection of debris.

Bill Sinclair, technical director, Adveco said, “For property renovation where space is at a premium or when existing gas appliances need modernising, the AD wall-mounted water heaters range delivers highly efficient operation in a compact form factor. The titanium-stabilised stainless-steel construction of the AD’s heat exchangers is also the perfect response to counter the concerns of corrosion in soft or softened water applications.”

Also included is an inbuilt controller with an LCD display that ensures full temperature control and a maintenance self-check of primary components and functions.

Additional Information

  • Compact wall-hung arrangement
  • High-efficiency pre-mix burner provides a large modulation range
  • Ultra-low NOₓ emissions at 16-29 mg/kWh
  • Available using natural gas or LPG
  • Supports standard concentric or parallel flue systems using an adaptor for low-cost 80/125 mm diameter PP available on request
  • Integrated run/fault signal for connection to BMS

Extra Gains For Net Zero Restaurants

Commercial hot water specialist Adveco is working in partnership with a global restaurant brand to support the rollout of net zero restaurants demonstrating low emission innovations throughout its chain of UK drive-through and high street franchises.

Through its programme of live metering, Adveco demonstrated that servicing domestic hot water (DHW) water demands of between 1200-1500 litres per day could equate to as much as 20% of total energy usage within the organisation’s target net zero restaurants. A recent refurbishment of a restaurant in the King’s Cross area of London provided an opportunity to address the emissions generated by this provision of hot water for the restaurant. In addition, working within existing building limits means applications need to maximise often limited plant room space. This was especially true of this central London location which also faced problems with limescale due to the hardness of the water supply.

Working to an all-electric specification, Adveco designed an application that would harness a 9kW FPi32 air source heat pump (ASHP) for preheat and supplying additional top-up heat with an ARDENT P 12kW electric boiler. These would supply thermal energy to a mains water-fed compact SST500 stainless steel twin-coil indirect cylinder.

By combining ASHP and an electric boiler Adveco can address many of the complexities associated with integrating ASHPs into existing buildings. This combination enables systems to be sized down, by as much as half in terms of ASHP requirements delivering immediate capital savings as electric boilers are far less expensive compared to an equivalent heat pump. You also immediately reduce the physical size of the system, embodied carbon and demand from the electric supply. Additionally, the system retains redundancy should there ever be a failure.

Balancing a hybrid electric system is key to ensuring efficient operation. Adveco supplied the controls to assure the water heating remains consistent, optimising the ASHP preheat and top-up from the boiler to reduce energy demands and the building’s emissions.

The other advantage of incorporating the ARDENT electric boiler was that it heats water using immersion heaters located in a small tank within the boiler housing rather than directly installed into the hot water tank. This creates a sealed ‘primary’ loop to the indirect coil in the SST500 cylinder. The electric boiler heats the same water continuously so there is only a small, finite amount of scale in the system which will not damage the elements. The heat exchanger in the cylinder is a large coil operating at a relatively low (80°C) temperature eliminating the common problems of destructive limescale build-up seen in direct immersion electric heating.

The electric boiler operates at the same efficiency as an electric immersion heater (100%) and so the only overall difference in system efficiency is the minimal pump electrical consumption and a negligible amount of heat loss in the pipework

Although the system takes up a little more space than an all-in-one electric cylinder, it has more versatility. It requires less clearance for the cylinder, so it was compact enough to fit into the extremely limited space allowed for plant in the restaurant. With the cylinder forming significantly less scale, the restaurant has gained from vastly improved reliability while reducing maintenance demands, for both operational and maintenance savings on top of crucial emission reductions.

Visit the Adveco restaurant resource for more guidance on delivering low carbon and renewables to help achieve net zero restaurants by 2050, or read our free handbook. 

Building Sustainability Into Commercial DHW

For more than fifty years, Adveco has been a leading innovator providing domestic hot water (DHW) applications for commercial-scale projects across the UK. Today its focus is shifting to encompass a blend of traditional and new, more renewable technologies in the form of solar thermal and especially heat pumps building sustainability into commercial DHW systems.

With a predicted one-third rise in non-domestic floor space by 2050, much of the current focus resides on new builds, but this still leaves more than 1.6 million pre-existing non-domestic buildings in England and Wales, generating almost one-fifth of the UK’s carbon emissions, needing expert, practical support.

Air source heat pumps (ASHP) have become the poster child technology for the government’s net zero strategy and therefore a core tool for building sustainability into commercial DHW systems.  The advantage of ASHPs is that, with performance greater than 100%, they can extract additional energy from outside of the building’s metered systems delivering significant carbon savings. For a commercial DHW system, it is recommended that a working water temperature from the ASHP, such as Adveco’s FPi32 or L70, must be at least 55°C. This is certainly attainable from current generation ASHPs when deployed in a hybrid approach. This uses the ASHP as preheat and combines it with either gas-fired or more preferably an electric top-up to achieve the required hot water temperature. This is where the additional system complexity and cost can creep in. But by correctly balancing a system through a mix of physical spacing in the vessel and system monitoring with dedicated controls, as developed for the Adveco FUSION, the system no longer fights itself, working seamlessly to deliver the highest operational efficiencies

In line with the European Commission’s proposal for a tightening of F-Gas regulations, development work continues at pace to support the introduction of R290, or propane as it is more commonly known. This refrigerant offers a coefficient of performance (COP) that enables working flow temperatures from an ASHP of up to 75°C and potentially much higher. This means future commercial systems can be less complex, without the need for additional electric immersion for high-temperature top-up and flushing for legionella protection. That said, immersions remain perfectly suitable for low-demand backup applications in boiler-fed indirect cylinders, ensuring business-critical DHW demands are met.

What we have seen more recently though is a shift in use, where immersions are used ‘directly’ in high-demand commercial applications as the primary heat source. An electric immersion heater has a high heat intensity compared to gas or indirect and, when coupled with high operating temperatures and hard water will increase the rate of scale formation which, over time, will cause the element to rupture.

In response, protecting a system from limescale is often only addressed by a vigorous cleaning regime. This method has a cost and downtime associated with it that is not acceptable for many commercial buildings.  For this reason, minimisation of scale formation with a water softener or a scale inhibitor may be adopted, but for many sites neither provides a satisfactory response because of space, maintenance, downtime, or cost.  A better option for these sites would be to replace the immersion heaters with a low-scale forming hot water system.

The new Adveco ARDENT electric boiler range provides a proven and cost-effective answer. Electric boilers still utilise immersion heaters located in a small tank heat exchanger within the boiler housing. This electric boiler supplies a sealed ‘primary’ loop to an indirect coil in the cylinder. The electric boiler heats the same water continuously so there is only a finite amount of scale in the system which will not damage the elements. The heat exchanger in the cylinder is a large coil operating at relatively low temperatures. Adveco’s extensive experience with indirect coil use in the UK has shown that scale is not a significant problem in these systems. The electric boiler operates at the same efficiency as an electric immersion heater (100%) so the only overall difference in system efficiency is the minimal pump electrical consumption and a small amount of heat loss in the pipework.

An electric boiler hot water system will take up a little more space than an all-in-one electric cylinder, but it has more versatility and requires less clearance for the cylinder. Similarly priced to an immersion heater, an electric boiler-based system will cost slightly more due to the small amount of additional installation work. But with virtually no maintenance and the cylinder forming significantly less scale, vastly improving reliability, the operational and maintenance savings will offset these additional capital costs. The electric boiler additionally offers a level of redundancy that is not achieved with a single immersion heater.

As the limitation on new gas grid connections for heating systems becomes effective this year, it will become critical for system longevity to recognise the new challenges electric-only presents over more familiar gas-based applications. If a business already uses gas, then it can still upgrade to new gas appliances until 2035, with 100% hydrogen-ready options extending that window well into the 2040s based on current appliance lifespan.

Adveco continues to support the refurbishment of existing buildings, recently extending its ranges of direct-fired condensing water heaters – the AD and the ADplus. Both ranges provide a compact, floor-standing design that is easy to introduce into an existing plant room to provide high-demand semi-instantaneous and instantaneous hot water applications.  Improved combustion efficiency means the burner requires less gas, delivering up to 30% savings in fuel consumption, making it more cost-effective, while reducing emissions.  For smaller on-demand needs, ADplus heats only what is necessary, with no ignition for smaller withdrawals providing considerable additional energy savings. Both AD and ADplus as a result exhibit ultra-low NOX (Class 6 appliance at 27 mg/kWh) and CO emissions (19ppm). With the government already committed to enabling the blending of hydrogen in the gas grid, it is also worth noting that these latest generation direct-fired condensing water heaters will already support the initial 20% hydrogen/natural gas blend.

Together, these technologies offer actual development arcs right now for existing commercial properties that are currently on gas, or new builds seeking to embrace low or no emission choices building sustainability into commercial DHW systems for more environmentally friendly operations that will help organisations achieve net zero by 2050.

Adveco ARDENT Electric Boilers For Commercial Hot Water

  • A range of compact wall-mounted and floor-standing electric boilers from 12 – 100 kW
  • Provides high-temperature top-up for heat pumps systems
  • Counters limescale production in hard water areas as part of an indirect DHW system

Commercial hot water specialist Adveco, announces the range of commercial ARDENT electric boilers. Encompassing wall-hung and floor-standing variants with heat outputs from 12 to 100 kW, ARDENT provides an easy-to-integrate, high capacity, reliable, and compact response for electric hot water and central heating demands in commercial buildings.

“Designed to serve an indirect water heater or heating system, multiple electric heating elements immersed into ARDENT’s integrated water storage tank provide a rapid and reliable source of thermal energy for those seeking to avoid a reliance on gas energy supplies,” said Bill Sinclair, technical director, Adveco. “ARDENT can be combined with heat pump systems to provide a high-temperature energy source during the coldest months, or, as part of an indirect hot water system, can help eliminate damaging scale build-up commonly seen on direct electrical immersion heaters.”

The front-mounted controller with an LCD display provides intuitive control. With stepped power control and integrated overheat protection, ARDENT reduces start-up current and provides optimum heating output. ARDENT economically adjusts the heating load when approaching the set point temperature and range rating to tailor the boiler power to suit the application and reduce wear on the heating elements.

The compact wall-hung ARDENT is available in two ranges, ADRENT Standard and ARDENT Plus, offering outputs from 12 to 36 kW with multiple heating elements that provide built-in redundancy.

The ARDENT Standard 24 kW and 36 kW models feature one to three heating elements with thermostat input and output control to an external pump.

The ARDENT Plus 9 kW, 12kW and 24 kW models feature six to nine heating elements a front-mounted controller with LCD display, and as well as an integrated expansion vessel, relief valve, and circulation pump. Additional controls for a 3-port valve and fault output are also included.

For larger-scale applications, ARDENT electric boilers are also available as a floor-standing appliances with 60 kW, 80 kW and 100 kW heat outputs. Stepped element control is included, as well as an automatic air relief valve, safety valve, and temperature and pressure sensors. The integral controller boasts an LCD display and fault output.

-ends-

Additional Information

  • Wall-mounted ARDENT S & P has a protective IP40-rated outer shell. ARDENT floor standing models are rated IP20.

Adveco FUSION & AD Selected as Finalists in 2022 HVR Awards

  • Adveco AD Water Heater range is named a finalist in the  Commercial Heating Product of the Year category
  • Adveco FUSION named a finalist in the Heat Pump Product of the Year category

Hot water specialist Adveco is proud to announce it has been named a finalist in the 2022 HVR Awards. Adveco’s FUSION hybrid hot water system has been named a finalist in the Heat Pump Product of the Year category. Adveco’s AD Water Heater range has been selected for the HVR 2021 Commercial Heating Product of the Year category.

The Heating & Ventilation Review (HVR) Awards champion innovation, excellence and achievement across the heating and ventilation industry.

Greg Brushett, sales manager UK, Adveco, said, “We are extremely pleased to be once again named finalist in the 2022 HVR Awards, illustrating our continuous innovation of products designed to support the provision of commercial hot water.  Both of these products are perfect examples of Adveco leading the charge for low emission and more cost-effective responses to the delivery of business-critical hot water demands. Whether working on a new building or refurbishing legacy building stock,  for any organisation struggling to understand how it can better support the call to meet net zero by 2050 Adveco leads the way with practical answers today.”

Adveco’s FUSION FPH-S hybrid hot water system provides a range of low carbon, all-electric ASHP-based packaged hybrid hot water applications. The complexity and typical requirements of bespoke hybrid systems for commercial applications can make the integration of heat pumps in DHW systems more expensive and complex to install compared to traditional gas-fired alternatives. FUSION removes this complexity with its pre-sized options which harness Adveco’s FPi32 Air Source Heat Pumps with a compact, high-pressure ATSH calorifier with electric immersion. With dedicated controls and metering, FUSION provides a complete, low-carbon hot water system for a wide range of commercial end uses.

The Adveco FPi32 provides the system with a compact monobloc-designed air-to-water heat pump providing preheated hot water at a working temperature of 50°C. The FPi32 range leverages R32 refrigerant to enhance year-round efficiency (COP as high as 5.23) while reducing the global warming potential (GWP), thereby lowing environmental impact. For a project that has to drive sustainability within the building but also meet pressure requirements greater than six bar, then the FUSION is by far the most efficient and cost-effective choice.

The Adveco AD offers a range of compact commercial semi-instantaneous gas condensing water heaters composed of four models, from 70 to 280 kW. Conceived for high-demand semi-instantaneous hot water applications, Adveco AD’s patented space-saving design makes it equally applicable to both new projects or renovation work where a lack of space would traditionally stall or quickly drive up costs of a project. The perfect all-rounder, especially in soft and softened commercial hot water applications, exceptional operational responsiveness and highly effective performance means AD can also be deployed in order to supply peak demands and redundancy for commercial buildings with an existing gas connection and large-scale ASHP to water systems.

The HVR Awards will be announced on September 29th 2022.


AdvecoAdveco is committed to helping companies become net zero through efficient commercial heating and hot water systems.

Discuss carbon reduction in your next project by calling 01252 551 540 or visit the contact page.

Public Sector Funding for Decarbonisation

The government has launched its latest phase of public sector funding for decarbonisation, dedicating up to £635m for building upgrades to improve energy efficiency and install a range of clean technologies through schools, hospitals, and other public buildings.

Forming part of a wider £2.5bn programme, Phase 3 of the Public Sector Decarbonisation Scheme is providing £1.425 billion of grant funding over the financial years 2022-2023 to 2024-2025. The funding aims to support the government’s goal of reducing emissions from public sector buildings by 75 per cent by 2037, compared to 2017 levels, as set out in the Net Zero and Heat and Buildings strategies.

As the government looks to tackle soaring energy costs, it is intended that the funding will support a wider reduction in energy bills, to the tune of up to £650m a year over the next 15 years. As we have outlined, reducing emissions and energy costs do not necessarily go hand in hand, especially if working with heat pumps to supply hot water.

According to The Department for Business, Energy, and Industrial Strategy (BEIS) 734 grants had been awarded to public sector organisations across England to date, with phase one of the scheme supporting up to 30,000 jobs in the clean heating and energy efficiency sectors.

Applications for public sector funding for decarbonisation open from September and the government has issued guidance on how public bodies can apply for the latest wave of funding to be delivered on behalf of the government by Salix Finance, which also provides financing packages to help public sector bodies undertake energy-saving projects.

Salix Finance chief executive, Annie Shepperd, has urged public sector organisations across the country to move quickly to curb their energy use ahead of the significant increases in energy costs that are widely expected this winter.

“There is no time like the present to push forward with the decarbonisation agenda as our country must meet its ambitious targets to reduce our carbon footprint and reduce our consumption of very costly energy,” she said. “This vital work is driving down our carbon footprint and making these buildings better places for people to work in and for the public to use.”

Business and Energy Minister Lord Callanan said, “By helping even more public sector bodies ditch costly fossil fuels, we are taking an important step towards a more sustainable future while driving economic growth across the country and continuing to support tens of thousands of jobs.”  He also claimed that the scheme was already delivering upgrades to “hundreds of public buildings across England, making them cheaper to run and saving taxpayers millions of pounds each year”.

While such claims relating to public sector funding for decarbonisation should be appropriate to new build structures, upgrading existing buildings is a far more complex activity than these statements suggest. The focus on decarbonisation to address climate change is the only clear guaranteed deliverable at this time with the technology being promoted, which is predominantly heat pumps. Further work needs to be done by the government to push other technology opportunities, such as solar systems and especially solar thermal for water heating which has become an increasingly cost-effective and proven approach and hydrogen blend in the grid if cost savings are to be factored into the argument for embracing green initiatives at a commercial grade.


AdvecoAdveco is committed to helping companies become net zero through efficient commercial heating and hot water systems.

Discuss carbon reduction in your next project by calling 01252 551 540 or visit the contact page.

Heat Pumps – The Cost Of Reducing Emissions

With the government strongly advocating the use of heat pumps as a method of delivering net zero targets for commercial properties, we have noticed the trend for broad statements implying that while cutting emissions, heat pumps also reduce the energy costs for a building. It’s just not that simple argues Adveco’s UK sales manager Greg Brushett. So what is the cost of reducing emissions?

We strongly support the advantages of heat pumps as part of an all-electric or hybrid domestic hot water (DHW) system to achieve carbon savings. With DHW equating to as much as 20% of the total energy demand for domestic buildings and anywhere from 10-70% for commercial properties, it is important to clarify how heat pumps are being employed in a building’s system.

With a gas-fired system, you can achieve a safe DHW storage temperature without a significant impact on the overall efficiency but with a heat pump you need to either force the compressor to work very hard, which will reduce the Coefficient of Performance (COP) or, in a lot of cases, use the heat pump to partially heat the hot water and then use an immersion heater  – which has a COP of just 1.0 and therefore higher energy costs – to do the remaining work. If you are willing to accept this extra cost, working flow temperatures of 50- 55°C from the heat pump to an electric or hybrid DHW system are more than achievable year-round in the UK, and emissions will be dramatically reduced.

However, broad statements such as “heat pumps reduce costs” or “gas boilers remain more economic to run than heat pumps” are inherently misleading.

A heat pump can supply a properly insulated building’s heating system completely, and if designed well enough, can achieve a COP of 3.0, or slightly more, giving a similar yearly cost (within 10%) to that of a gas-fired heating system This would also be more attainable with the recent change in gas and electricity prices.

The same is not true of a hot water system. Following initial modelling and analysing reports from live systems a hot water hybrid system that achieves 50°C with an overall COP of 2.76 and uses an immersion heater to top up to 60°C has an overall efficiency of 2.4 based on the weighted average. Using these results, the running costs of the system are seen to be significantly higher than a gas system. However, the argument does demonstrate that incorporating heat pumps into an electric-only DHW system shows considerable savings over a COP of 1.0. Partnering this with other technologies such as solar thermal will only increase the benefits.

Benefits or efficiency?

Making the right choice between heat pump or gas depends on what an organisation is intending – whether seeking active emission reduction now, or, if already on gas, securing cost-saving operation until sustainable technology further matures, and costs fall.

Heat pumps can give incredible carbon emission savings for existing buildings, but as a way to reduce energy costs, replacing a gas-fired boiler/water heater with a heat pump doesn’t always add up. Commercial properties have unique demands, especially for DHW, making better application design and installation all the more important when it comes to specifying the right technology. Be wary of claims being made regarding the application of heat pumps, especially for the provision of DHW when it comes to calculating the cost of reducing emissions.

Future Climate Now

It may seem counter-intuitive to be talking about the need for hot water as the country is potentially about to experience the hottest day on record, but there is absolute sense when we accept that the current weather extreme is a sign of future climate developments and why it is critical UK organisation begin planning responses now.

On Monday, temperatures in Suffolk peaked at 38.1C, just shy of the record 38.7C set in 2019. The UK has seen high temperatures in the past, the famed summer of ’76 actually peak at 35.6C but it lasted throughout July and August of that year. The current heatwave is set to break in a matter of a week, so is this really that big an issue? In short, the answer is yes according to the majority of climate scientists who see these weather extremes as a sign of climate change, which means in the coming years we will experience more extreme climate events and they will occur more often.

According to the Met Office, the conditions causing the current extreme heat are ten time more likely as a result of the average world temperatures rising just over 1C beyond levels seen prior to industrialisation. That means we are now experiencing – according to the UN’s climate science body, the Intergovernmental Panel on Climate Change (IPCC) – the hottest period for 125,000 years. This is why the UN set a limit on global temperature increases to 1.5C higher than pre-industrial levels in order to avoid the most dangerous impacts of future climate change.

The cause of this accelerated warming are greenhouse gas emissions resulting from the burning of coal, oil and gas. Pushing trapped carbon dioxide concentrations to the highest levels in more than two million years, heat becomes trapped in the atmosphere leading to the temperature extremes we are seeing today.

Last year’s UN conference on climate, COP26, painted a stark picture for future climate. If global policy on climate change were to be implemented as promised then the expectation was for a temperature rise of 2.4C from pre-industrial levels by the end of the century, meaning current temperatures would be mild in comparison. This is why the ambitious target of reducing emissions to prevent global temperatures exceeding 1.5C was agreed upon. To achieve this, emissions need to have reached a peak by as late as 2025, before being effectively halved by 2030 leading to further scaling back to achieve net zero emissions by 2050.

To put that into perspective, according to the IPCC, there needs to be a minimum reduction in emissions of 43% by the end of the decade, yet as the world came out of the pandemic energy emissions grew last year, by more than 4% in the UK and more than 6% globally to the tune of some 36.3 billion tonnes of CO².

What is clear, according to the Climate Change Committee (CCC), is that the UK’s progress towards net zero is woefully inadequate. Government strategies for the public sector, which is expected to lead by example, are still focused on information gathering with the intent to drive the adoption of new low-carbon technologies from 2025, which feels too little too late. Particularly when you start to factor in the capital costs of instigating a wholesale shift in the way buildings are heated and hot water supplied to meet core business needs.

The commercial built sector is especially complex, and the scale of the challenge is daunting both in terms of new build and refurbishing existing building stock not necessarily designed to work with new low carbon technology. There are more than 1.6 million pre-existing non-domestic buildings in England and Wales, generating almost one-fifth of the UK’s carbon emissions, needing expert, practical support. By 2050, there is also a predicted 35% rise in demand for non-domestic floor space.

Initially, the hope is that proven technology, especially heat pumps, can make a major improvement to the sector, helping to decrease emissions. Space heating is problematic for older buildings where the very fabric of the building will influence the efficient operation of the technology, meaning extensive refurbishment is required. For hot water systems (DHW) this is not the case, and heat pumps and all-electric applications hold huge potential for reducing emissions by as much as 70%. Savings can also be achieved through the application of solar thermal, which can work in conjunction with heat pumps, but also critically existing gas-fired systems to deliver emission reductions right now.

July’s extreme weather should be seen as both a warning of future climate change and a rallying cry to the entire commercial sector to look at what you can do better with what you have now and what you want to build in the coming decades. Adveco has the expertise to help you answer those questions and begin delivering better DHW applications now because there is very little doubt that in the near future the government will need to introduce more aggressive policy that will mandate change. Better then to control the timeframe and plan your transition toward net zero in a way that is most meaningful to your business from the perspectives of cost to corporate social responsibility.

Adveco ADplus Instantaneous Commercial Water Heaters

  • A range of three compact floor-standing commercial instantaneous gas-fired condensing water heaters with built-in storage tank
  • Perfect for all water qualities with a 5-year warranty on burner and heat exchangers

Commercial hot water specialist Adveco, announces the Adveco ADplus range of high-power gas-fired condensing water heaters featuring an integrated 120-litre stainless steel water storage tank for instantaneous continuous and on-demand domestic hot water (DHW). The ADplus is available in three variants – 70 kW, 115 kW and 140 kW rated heat output.

“Designed to provide a compact, high capacity and reliable method for delivering instantaneous hot water to a commercial building, ADplus is a tough all-rounder,” said Bill Sinclair, technical director, Adveco. “It is perfect for a wide range of applications – from small instant demands to large-scale continuous DHW needs. With minimal NOX and CO emissions, the ADplus range is an eco-friendly way to serve your building’s DHW system. The rugged construction, supported by Adveco’s in-house warranty engineers, provides real peace of mind for your investment.”

The 115 kW and 140 kW ADplus variants offer two high-quality heat exchangers. Constructed from corrosive-resistant continuous run titanium-stabilised stainless steel, these provide balanced highly efficient operation and built-in redundancy. Heat is provided by the patented Fecralloy premix burner fed by a consistent balanced air/gas ratio at each point of turndown. The high modulation ratio results in high combustion efficiency with ultra-low NOX and CO emissions. A built-in flue back preventer on the combustion circuit prevents possible flue gas recirculation between different exchangers.

The tough, stainless steel 120-litre storage tank is provided with electronic anodic protection and high-quality polyurethane thermal insulation. This enables the ADplus to serve as a semi-storage system, providing always available and instantaneous supply with quick recovery times for continuous provision of DHW. For on-demand needs, ADplus heats what is necessary, with no ignition for smaller withdrawals providing considerable energy savings. When heat is required, the condensing technology provides up to 30% savings in fuel consumption. To reduce acidity build-up caused by the condensing process, the ADplus is equipped with a condensate acidity neutraliser, specifically sized to restore tolerable pH values. With the anti-corrosive construction, ADplus can be used with soft and softened water. For harder water, the recirculating pump regulates the correct water flow according to inlet water hardness helping to prevent the formation of limescale on the heat exchanger surface, ensuring high performance throughout its life cycle.

The extremely compact Adveco ADplus is designed to pass through a standard 65cm wide door for trouble-free installation and offers front access to all inner components for quick, easy maintenance. The integrated cascade controller supports full temperature control and self-check maintenance functions for up to 8 units. The controller accommodates 0-10 input, MODBUS communication, and alarm output for seamless BMS integration.

Additional Information

  • High capacity DHW production
  • Compact floor-standing arrangement
  • High-efficiency pre-mix burner with a five-year warranty
  • Extremely high-quality AISI 316Ti heat exchangers with a five-year warranty
  • Ultra-low NOX emissions, class 6 appliance at 27 mg/kWh
  • CO emissions 19ppm
  • High maximum run pressure up to 11 bar
  • Flue gas non-return valve for overpressure cascade flue systems
  • Standard flue systems using low-cost 110mm diameter PP
  • Available using natural gas or LPG

Read more about the Adveco ADplus instantaneous commercial water heater range 

Part L – New Building Regulations For Commercial Hot Water

Introducing changes to Part L of the Building Regulations (Conservation of fuel and power) for England represents a commitment to raising the energy performance of buildings to provide a pathway to highly efficient non-domestic buildings which are zero carbon ready, better for the environment and fit for the future. Although due to be formally released in 2025, the first of a number of interim measures come into force this month.

Whilst the new regulations will have a profound impact on new-build projects, refurbishment works are likely to be initially affected by the introduction on June 15th of new restrictions on the specifying of poor-efficiency direct-gas fired water heaters. Under Part L, new regulations for hot water systems essentially end like-for-like replacement for non-condensing water heaters by imposing new minimum efficiencies (91% for natural gas and 92% for LPG).

Each new fixed building service, whether in a new or existing building, must meet the legislated values set out for efficiency. Replacement fixed services must be at least as efficient, either using the same or a different fuel as the service being replaced with matching or preferably better seasonal efficiency.

If moving over to a new fuel system, such as oil or LPG to natural gas, it should not produce more CO₂ emissions nor more primary energy per kWh of heat than the appliance being replaced. If ageing renewables such as wind or solar are being replaced the electrical output must be at least that of the original installation, except where it can be demonstrated that a smaller system would be more appropriate or effective. And if work extends or provides new fixed building services energy meters will need to be installed.

When specifying a DHW system, sizing should be based on the anticipated demand of the building (based on BS EN 12831-3). The regulations demand systems not be “significantly oversized,” but we would argue any oversizing will have a negative impact on the efficiency and operational costs of a DHW system. So accurate sizing is critical in terms of delivering an optimal thermal efficiency assessment. That assessment will include the heat generator and any integral storage vessel, but will exclude all secondary pipework, fans, pumps, diverter valves, solenoids, actuator and supplementary storage vessels from the calculations.

As a guide the minimum thermal efficiencies for natural gas-based DHW systems, based on gross seasonal efficiency of the heat generator are:

91% –                                 Direct fired for new building with >30kW output*

91% –                                 Direct fired for new building with <30kW output*

91% –                                 Boiler efficiency for indirect-fired systems in new & existing buildings

100% assumed                Electrically heated new & existing buildings

* Product standard BS EN 15502-2-1:2012 for gas-fired boilers and appliances of a nominal heat input not exceeding 1000 kW / BS EN 89 gas-fired storage water heaters for the production of DHW

Adveco carries of range of stainless steel direct-fired condensing water heaters, the AD and new ADplus ranges, and MD boiler range, which all leverage advanced burner control to drive efficiency as high as 106%. Plus glass-lined condensing water heaters such as the AO Smith BFC Cyclone (97% efficient) and Innovo (98% efficient) provide a range of choices that already exceed the latest regulations under Part L and provides a safety net should regulations tighten in the future.

As with the broader regulations relating to space heating, controls form a necessary element of the new Part L regulations for combustion heated DHW systems. These all must incorporate a time control (independent of space heating circuits) and an electronic temperature control.

Additionally, regulations call for fully pumped circulation where compatible with the heat generator for primary hot water circuits. Automatic thermostatic control to shut off the burner/primary heat supply when the desired water temperature is reached, and primary flow if the system temperature is too high for all direct-fired circulator systems, direct-fired storage systems and indirect-fired systems. Direct-fired continuous flow systems should include a heat exchanger flow sensor to control outlet temperatures and detect insufficient flow with burner/heat input shut off. A high limit thermostat is also required to shut off the primary flow if the system temperature is too high.

Point-of-use, local and centralised domestic hot water systems should have automatic thermostatic control to interrupt the electrical supply when the setpoint storage temperature is reached or the system temperature gets too high. If there is an over-temperature trip manual reset should be possible.

Local and centralised DHW systems should have both a 7-day time control and the facility to boost the temperature by using an immersion heater in the cylinder.

Instantaneous water heaters should include a flow sensor to control the rate of flow through the heat exchanger. If the sensor detects insufficient flow, it should shut off the electrical input. Plus, a high limit thermostat is required to shut off the primary flow if the system temperature is too high.

Alongside gas, solar thermal is likely to be applied in the notional building unless heat pumps meet 100% of the actual building’s demand. Solar has been used in calculations in the past to overcome the poor fabric performance of a building. But, given the broad majority of heat pumps are currently used for preheat on commercial DHW applications, at most offsetting 70% of the energy demanded, solar thermal has a valid role to play and it’s a proven sustainable technology. Our expectations are for commercial DHW systems to continue in a familiar manner for the near to mid-term, with gas appliances used to provide cost-effective supply, especially during grid peak hours. Heat pumps and/or solar thermal will be deployed to provide preheat to that system.  As efficiencies improve and higher water temperature (more than 60°C) are achieved through heat pumps we see gas appliances slowly being phased out unless they can be replaced with green gas (hydrogen) alternatives. This naturally leads to the provisioning of hybrid systems for the coming decade, optimising a mix of current technologies that address the latest regulations, reduce emissions and crucially deliver value for money with lower operational costs.

These measures are designed to enforce a move away from fossil fuels to low carbon technology for heating and domestic hot water (DHW) and set a more rapid timeline. There is no doubt these new measures will ultimately represent a seismic shift in thinking when it comes to commercial hot water and heating applications, but a cushion has been built in to allow for the development of systems that are necessarily more complex than would be seen in domestic settings. This brings considerable opportunities for developers and specifiers willing to consider both existing and new technologies in order to deliver compliant applications in the next five years.

Whilst a fabric first approach is encouraged, low carbon technologies are being emphasised. This ultimately means heat pumps for the broad majority of DHW applications where there is a low heat demand. For commercial properties where there is typically a high heat demand gas is still allowed while the industry works to develop suitable alternatives.

One final observation on the implication for the specification and installation of commercial DHW relates to completion requirements. Part L tightens the commissioning requirements to reduce the gaps in performance over design and is intended to deliver improved project handover with accurate energy usage predictions. As a result, we can expect to see revisions of commissioning processes across the industry to help streamline delivery and speed up handover, crucial if government roll-out targets for low carbon technologies to achieve Net Zero by 2050 are to be met and superseded by commercial organisations.

 

Regulation changes take effect on 15 June 2022 for use in England. It does not apply to work subject to a building notice, full plans application or initial notice submitted before that date, provided the work for each building is started before 15 June 2023. Regulation changes do not currently apply to Wales, Scotland or Northern Ireland.