Solar thermal commercial water heating installation.

Solar Thermal

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Adveco Solar Thermal

Designed to support commercial buildings which use large amounts of daily hot water, solar thermal will be a valuable addition to any new build hot water application as well as an ideal technology to address decarbonisation goals for existing properties with gas connections.

It is important to realise that solar thermal systems alone will typically not generate a business’s total energy requirements to meet the year-round demands for domestic hot water (DHW).  For this reason, the optimal application for solar thermal is to supply pre-heated water into the DHW system. Correctly designed and sized, the solar thermal system can then generate a substantial proportion of the hot water requirements, enough to reduce reliance on the gas or electric boiler, especially during summer months.

Solar thermal also lends itself to working in conjunction not only with other conventional heating technologies but also with the latest generation of renewables, in particular heat pumps.  This can be of great advantage to a business, reducing carbon emissions and lowering energy costs to advance sustainability strategies today.

Depending on the building and energy consumption habits, solar thermal will typically provide at least 30% of the annual hot water demand.

Solar thermal commercial water heating installation.

Features & Key Technologies

Options

Solar Thermal and Gas Water Heating 

Solar thermal preheat for buildings with an existing gas connection which rely on large amounts of domestic hot water (DHW).

Solar thermal pre-heat, followed by gas water heating to ensure peak demands are met.

Reduces demand on gas-fired water heating to conserve energy. reducing emissions and operational costs.

Basic System Elements:

  • Flat plate collector
  • Drain back module
  • ATSI stainless steel cylinder
  • ADplus water heater

 

Solar thermal and gas combined water heating for commercial applications.

Solar Thermal and Electric 

Solar thermal preheat with electrical water heating for new build and gas replacement projects which rely on large amounts of domestic hot water (DHW). 

Solar thermal pre-heat with electrical water heating to maximise efficient hot water generation and meet peak demands. 

Low carbon (in line with grid electrical supply) system and helps control operational costs associated with electric-only water heating.

Basic System Elements:

  • Flat plate collector
  • Drain back module
  • ATST twin coil stainless steel cylinder
  • ARDENT electric boiler 
  • Optional backup electric immersion for added system resiliency 
Solar thermal electric commercial water heating.

Solar Thermal, Airs Source Heat Pump and Electric Water Heating 

The Air source heat pump’s (ASHP) coefficient of performance (COP) is maximised by preheating the cold supply to 40°C.  Solar thermal provides a second-stage preheat raising water temperatures to at least 50°C. The electrical water heater is used to meet the final required operational temperature of 65°C and ensure peak demands are addressed. 

For new build and gas replacement projects with large DHW requirements seeking to maximise carbon reduction and lower operational costs. 

Basic System Elements:

  • Flat plate collector
  • Drain back modules
  • FPi-32 air source heat pump ASHP)
  • ATSH stainless steel cylinder 
  • ATSTI stainless steel cylinders
  • ARDENT Electric Boiler 
  • Optional backup electric immersion for added system resiliency 
Solar thermal electric commercial water heating and ASHP flow diagram.
Solar thermal electric with flow and Air Source Heat Pump (ASHP) rear

Download The Adveco Solar Thermal Brochure

The Adveco Solar Thermal handbook provides you with a quick and easy reference guide to proven, easy-to-maintain, low-carbon hot water for commercial buildings.

Featured Case Study: The New Benchmark In Sustainable Building

100 Bishopsgate is the latest prestige construction project in the financial district of the City of London. Operated by Brookfield Properties, the development is a stunning all-glazed tower offering 37 floors of mixed-use that has been designed and constructed to meet the highest standard of efficiency, achieving an ‘Excellent’ BREEAM rating to maximise sustainability and reduce the carbon footprint over the lifetime of the building.

Solar panels, part of a solar thermal commercial hot water system.

FAQs

Faced with an increasing expectation to become more actively sustainable, as well as mitigating rising energy costs, commercial organisations need to give greater consideration to the integration of a solar thermal heating system as part of their premises. Not only a proven and extremely reliable technology, solar thermal offers a clear path to reducing CO₂ emissions.

Correctly designed and sized, the solar thermal system can generate a substantial proportion of the hot water requirements, enough to reduce reliance on the gas boiler, especially during summer months. This alone can result in considerable savings in the overall energy overheads of the business.

This panel is deliberately left hidden.

Before committing to a solar thermal system, it is vital to consider a wide range of factors. Besides maximising the efficiency of the appliance, it is equally important to have a sustainable and ecologically sound installation. We have stated how solar thermal systems are ideal for organisation that use and rely on large amounts of hot water (restaurants, hotels, schools, hospitals and larger offices), but it is important to understand that a solar thermal system will not fully replace your existing water heating system and will not provide space heating. The actual percentage of your water heating demand covered by solar thermal will depend on your site and energy consumption habits (though this figure is typically around 30% for commercial sites). A south-facing and unobstructed roof with an inclination of 30° from the horizontal is optimal, though by no means essential as Adveco solar collectors can be installed in a variety of ways: built on roof; built in roof; mounted on walls or on frame construction to achieve inclination on flat roofs.

All areas of the UK are suitable for solar energy technology; however, even minimal shade can greatly reduce a system’s output. If a solar thermal collector suffers significant shade coverage, then the technology will not be applicable and a commercial air source heat pump, such as the Adveco FPi range, may be a preferred option to produce low carbon heat. Assuming the location exhibits no shade issues, Adveco’s application engineers will assess a building’s hot water demand and calculate the number of collectors and size of the storage vessel to correctly size an application.

Solar thermal systems are most productive in the summer months, when there is most sunlight, resulting in the additional need for non-renewable energy sources during the winter months. Despite this sustainability is more than achievable, and Adveco will package the appropriate technology.

Solar thermal.

As with any water heating system, every application is unique and this demands a bespoke approach Especially when it comes to correctly sizing the solar thermal system, which will ensure the design is optimised for the application and will therefore operate efficiently.

First, a correctly sized system will consider the daily usage and peak demands. Its aim is to serve all peaks from storage, with the size of the peak determining the size of pre-heat. The recovery time for peaks is what ultimately determines number of collectors a building requires.

Second, the design process needs to size usage with available space. So, sizing considers whether the site is flat, pitched or vertical and the type of construction, its direction and shading. Length of pipe run is also important, if collectors are located a considerable distance from the plant the system’s thermal losses could be significantly detrimental to efficient operation.

Together this enables the calculation of the Solar Fraction – the total annual heat for hot water compared to the total available from solar inputs. To this is then added the details of other energy heaters (electrical or gas) that are to be used to fully visualise the completed system.

For buildings already on gas and that rely on large amounts of domestic hot water (DHW) – a large proportion of current commercial UK properties – solar preheat is the preferable option. Depending on the building and energy consumption habits, solar thermal will typically provide around 30% of the annual hot water demand.

If electrical costs can be offset by adopting solar thermal pre-heat and a gas water heater to meet peak demands, then the numbers can be very favourable. A ten-year return on investment becomes very achievable and the property gains undisputed carbon and cost savings.

Such hybrid approaches are unavoidable for commercial projects seeking a path to low-carbon hot water and is the most sensible, practical, and cost-effective option. By using solar thermal with gas after heat, commercial organisations can actively drive sustainability and retain control of operational expenditure for decades to come. With the hydrogen policy to be confirmed in 2026, retaining gas in existing commercial buildings keeps options open and future-proofs a building for other emerging heating technologies.

For new build properties without a gas connection, solar thermal still offers an opportunity to reduce an application’s annual energy demands by 30%, and thereby reduce the currently more expensive than gas operating costs.

This hybrid approach can be extended with the inclusion of air source heat pumps to provide initial pre-heat to the system cold feed. Operating at lower temperatures maximises the efficiency of the heat pump, reducing electrical operating costs and raising working flow temperatures from 10°C to 40°C. This is not hot enough for commercial applications, so the pre-heated water is then passed to the solar thermal system. essentially free to operate, the solar thermal system boosts the working flow temperatures from 40°C to at least 50°C. During summer months it is possible for the solar thermal system to deliver the necessary 60°C+ working flow for safe provision of commercial hot water.

To ensure safe, consistent and necessary high operational temperatures, the water then passes to an electric water heater. In most cases, Adveco will now recommend one of the variant compact FUSION E water heaters where final consistent water temperatures of 65°C are assured 24/7 year round. The application of an immersion backup in the FUSION Eplus variant offers further system resiliency for organisations that deem consistent hot water provision to be business critical.

Adveco Flat Plate Solar Collectors provide a number of options for installation on the roof, in the roof and on a building’s facade. For further information visit the Solar Thermal Collectors page.

Adveco specialises in design for solar thermal and can support and provide recommendations for your installation needs.

For installers wishing to offer solar thermal services, Adveco provides installation training via CPD and onsite instruction. To arrange training please visit our Solar Thermal CPD page

 

 

Why Choose Adveco

fifty-year-history-logo

50 Years

Adveco Ltd. is the independent hot water specialist for the commercial built environment and has historically traded as A.O. Smith Water Heaters in the UK.

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Highest quality products and services

We prioritise our clients’ needs to deliver bespoke, practical systems.

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Full aftersales support

Maintenance and service packages, commissioning, spares, warranty and technical support for your application.

Contact Us

UK (Head Office)

Download our Product Guide

Solar Thermal Collectors

Solar Thermal Collectors

Solar Thermal Collectors

As part of a commercial solar thermal application, Adveco’s large flat plate collectors are designed to help reduce energy demands, cutting carbon emissions and reducing operational costs associated with the provision of hot water.  

The large, modular design supports a variety of roof and wall mounting options to meet the needs of both new build and refurbishment projects.  

The collectors house a  low-weight, high-performance copper meander absorber manufactured with high-quality ultrasonic welding that assures system longevity and free movement of solar fluid within the collector plate.

Horizontal collector

Features & Key Technologies

A Truly Sustainable System For All Types Of Commercial Buildings

Solar thermal collectors are by far the most efficient way to heat water with solar energy. This means flat plate collectors offer a smaller footprint compared to equivalent solar photovoltaics (PV) for domestic hot water (DHW), making them a prime choice when roof or facade space is limited. 

A typical  4 kW PV system requires approximately 16 panels covering 25m² of roof to match just three Adveco flat plate collectors covering just 6.6m² roof area.

Adveco recommends its solar thermal collectors be supplied with an integrated drain back module to prevent the overheating of solar fluid (glycol) within the flat plate collector to ensure system longevity. 

This approach enables commercial buildings with high demands to deploy a large number of collectors with a small tank and still provide high-temperature water with the knowledge that in times of low use high-temperature build-up in collectors is impossible. This ensures the system remains protected.

This approach is also more cost-effective as there is no
requirement for the installation of large solar storage, and more efficient as there is no call to dump unused heat.

For installations in densely urbanised areas, Flat Plate Collectors and Drain Back operate with no noise for zero sound pollution. The system uses no refrigerants, so avoids issues of chemicals with high global warming potential (GWP) and requires no specialist registration, such as F-gas, although installers should be solar trained

 

Due to the modular concept of Adveco’s flat plate solar thermal collectors, applications can be introduced into a wide range of commercial buildings, no matter the form factor of the structure.

Whether roof-mounted, roof integrated or fixed on floor or wall consoles, fixing and connection are carried out with the same components, whatever the installation type. All mounting systems are prefabricated, meaning subsequent adjustments should not be required, accelerating installation timeframes when on site.

All mounting components are manufactured from high-quality materials for assured, long service life. Delivered complete in a single package including assembly materials, installation of single and multiple panel systems is made easy.

Mount on roof hook. Integrated into the roof. Mounted frame on roof hook.

Frame for flat roof. Wall mounted frame. Façade installation.

Download The Adveco Solar Thermal Brochure

The Adveco Solar Thermal handbook provides you with a quick and easy reference guide to proven, easy-to-maintain, low-carbon hot water for commercial buildings.

Adveco Drainback Systems – For Long-lasting, Low-Maintenance Renewables

Drainback module

Specifications

Adveco Solar Collectors

Contact Us

UK (Head Office)

Download our Product Guide

Why Choose Adveco

fifty-year-history-logo

50 Years

Adveco Ltd. is the independent hot water specialist for the commercial built environment and has historically traded as A.O. Smith Water Heaters in the UK.

highest-quality-products-and-services-logo

Highest quality products and services

We prioritise our clients’ needs to deliver bespoke, practical systems.

full-after-sales-support-logo

Full aftersales support

Maintenance and service packages, commissioning, spares, warranty and technical support for your application.

Solar Thermal Drain Back

Drain Back Systems

Drain Back Systems

Overheating and air pockets can lead to costly and potentially damaging malfunctions in solar thermal systems. Overheated glycol fluid in the collector and pipework can quickly render systems completely inoperable and, in worst case scenarios, can require a complete system replacement.  

Adveco Drain Back counters these problems, as well as issues relating to high system pressure, dirty pumps and non-return valves, plus corrosion from acidic heat transfer medium all resulting from very high temperatures seen in modern solar thermal systems. 

A simple gravity-driven process within the compact module Drain Back module ensures trouble free operation and system longevity for improved returns on investment in renewables for water heating in commercial buildings.

Drainback module

Features & Key Technologies

Adveco Drainback Systems – For Long-lasting, Low-Maintenance Renewables

As with any technology, issues can arise if a commercial system is poorly designed or maintained. In terms of solar thermal systems, the results can vary from frustrating to catastrophic and can prove to be extremely costly.

By far the greater concern is the stagnation of the solar fluid as a result of high-temperature build-up within the collectors when a system is not operating. solar thermal collectors or panels utilise the sun’s energy to heat a water & glycol mix in the panel. This solar fluid is then pumped to a heat exchanger inside a water cylinder.

If a solar thermal system has no overheat protection the fluid can change to the consistency of tar. The ‘tar’ can rapidly develop as a film, and within a multiple collector system, it is likely that some of these will become blocked and will not be able to be cleared out causing permanent damage and resulting in very high repair costs. We have seen this issue develop in systems a matter of weeks after initial installation!

Overheat protection is therefore vitally important and will typically require the addition of a large solar storage or buffer vessel to dump unwanted heat to stop the system from stagnating. Together with the heat dump system starting in the middle of the day due to a short period of low demand, the Solar Thermal application could be extremely inefficient.

At Adveco, we are proponents of systems that deploy drain back, which as the name implies drains the solar fluid from the collector to a reservoir when not in use, allowing for a system to be safely off.

A drain back vessel located in the plant room is one option, that will also allow for pipework fluid, but will require greater head pumps.

With Adveco’s drain back module, installed on the flat plate collector commercial buildings with high demands can deploy a large number of collectors with a small tank and still provide high-temperature water with the knowledge that in times of low use high-temperature build-up in collectors is impossible. This ensures the system remains protected.

As there is no requirement for the installation of large solar storage, this approach is far more cost-effective and more efficient as there is no call to dump unused heat.

 

 

Example Adveco Drain Back & Flat Plate Collector Installation 

Download The Adveco Solar Thermal Brochure

The Adveco Solar Thermal handbook provides you with a quick and easy reference guide to proven, easy-to-maintain, low-carbon hot water for commercial buildings.

Adveco Solar Thermal Flat Plate Collectors To Reduce Energy Demands,
Costs & Carbon Emissions

Solar thermal draw back

Specifications

Adveco Drain Back

Contact Us

UK (Head Office)

Download our Product Guide

Why Choose Adveco

fifty-year-history-logo

50 Years

Adveco Ltd. is the independent hot water specialist for the commercial built environment and has historically traded as A.O. Smith Water Heaters in the UK.

highest-quality-products-and-services-logo

Highest quality products and services

We prioritise our clients’ needs to deliver bespoke, practical systems.

full-after-sales-support-logo

Full aftersales support

Maintenance and service packages, commissioning, spares, warranty and technical support for your application.

MSB Carbon Steel Buffer Vessels

MSB Carbon Steel Buffer Vessels

MSB Carbon Steel Buffer Vessels

The Adveco MSB range of carbon steel primary system buffer vessels has been carefully designed to fit most heating application that requires an inertia tank or energy storage vessel.

The MSB range features numerous high-, mid-, and low-level connections to ensure compatibility with almost any heating application. Such tappings enable the tanks to be used with multiple return flow temperatures or multiple heat sources, such as renewables or low- and high-grade heaters.

The range includes buffer vessels with capacities from 300L to 5,000L. All tanks are rated to 3 bar as standard, with options to 6 bar working pressure, and temperatures up to 95°C.

Features & Key Technologies

Options

Technical Specifications & Downloads

MSB Standard Carbon Steel Buffers

MSB 300 - 5000 L Data Sheet

MSB 300 – 5000 L Installation, Operation, and Maintenance Manual (coming soon)

Contact Us

UK (Head Office)

Download our Product Guide

Why Choose Adveco

fifty-year-history-logo

50 Years

Adveco Ltd. is the independent hot water specialist for the commercial built environment and has historically traded as A.O. Smith Water Heaters in the UK.

highest-quality-products-and-services-logo

Highest quality products and services

We prioritise our clients’ needs to deliver bespoke, practical systems.

full-after-sales-support-logo

Full aftersales support

Maintenance and service packages, commissioning, spares, warranty and technical support for your application.

FUSION sink or basin

Sink or Basin-led Projects Go Low Carbon

Sink or Basin Led Projects Go Low Carbon

FUSION sink or basin

For commercial organisations, there is a new pre-sized response to sink or basin-led hot water projects from Adveco.  The next-generation FUSION range from Adveco is a complete range of packaged electric and packaged renewable electric water heaters.

FUSION is a modern, future-proof system that embraces electric water heating and the option to incorporate air source heat pumps (ASHP) to lower carbon emissions in line with government calls for net zero. As an all-electric system, it uses familiar technology that is relatively simple and quick to install, cost-effective, reduces carbon emissions and removes dangerous NOₓ emissions for improved indoor air quality (IAQ) for enhanced occupant comfort. With an increased heating capacity over first-generation Adveco FUSION systems of up to 34 kW, the next generation of FUSION systems offers greater versatility for meeting domestic hot water (DHW) demands across a range of properties used for commercial operations. Projects with small to medium sink or and basin-led hot water demands, taller buildings with basement plant rooms and businesses that depend on 24/7 hot water provision for continuity of service all gain advantages from using FUSION.

The packaged format enables flexibility to specify from a range of cylinders, primary electrical heating, air source heat pumps for pre-heat, and immersions for back-up all supported by Adveco’s bespoke controls to ensure optimal, efficient operation. FUSION cylinders (ATSI & ATST) come with dedicated mounting points for the ARDENT electric boiler, simplifying and reducing the chance of installation errors.

By mounting the electric boiler directly to the cylinder FUSION is a more compact, space-saving option when specifying or having to refurbish an existing plant room. The cylinder connections and clean-out plate are all arranged on the front of the tank for easy access when connecting pre-built pipework with a choice of left- or right-hand side connection, and for regular maintenance. This arrangement also enables FUSION to be situated tightly into a corner, again maximising available space. Corrosion-resistant stainless steel construction makes FUSION’s cylinders perfect for either soft or hard water areas. With 10 Bar operating pressure, the ATSI and ATST are more than capable of serving the needs of taller buildings, especially those with existing basement plant rooms.

The use of the 9, 12 or 24 kW ARDENT electric boiler replaces the use of a single immersion for primary heating. Capital costs are not only equivalent, but ARDENT, with multiple immersions inside its sealed storage tank provides automatically balanced usage to prolong system life and immediate resilience for the boiler should there be a failure of one of its immersions. The typical cause of immersion failure in sink or basin-led systems is the creation of limescale in hard water areas, production of which is accelerated by the higher heat intensity of electrical water heating. This is avoided in FUSION, as the ARDENT is used in a sealed ‘primary’ loop to an indirect coil in the system’s cylinder.  The ARDENT 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, effectively eliminating damage to the immersions by limescale.

FUSION cylinders offer single (ATSI) and twin-coil (ATST) variants with capacities ranging from 200 to 500 litres. Single coil cylinders (ASTI) are used for standard electric indirect water heating with an ARDENT electric boiler (FUSION-E), and the option of an immersion for resistive heating ‘directly’ to water in the cylinder (FUSION-Eplus).

Dual-coil cylinders (ATST) enable the addition of a 6 or 10 kW FPi32 monobloc air to water heat pump. The ASHP is connected to the lower coil and supplies indirect pre-heat to the vessel, while ARDENT is connected to the upper coil to provide primary indirect heating (FUSION-T & -Tplus). FUSION E systems come with a thermostat and overheat thermostat as standard, but for renewable variants featuring dual-coil ATST cylinders and ASHP, optimisation within the FUSION system comes from Adveco’s purpose-built FUSION Control Box. This smartly balances the two heat sources enabling the water in the cylinder to be heated in the most efficient way. The heat pump’s contribution is maximised, achieving a working pre-heat flow temperature of 50°C under UK weather conditions, even if the ambient air temperature drops as low as -25°C.

With the cylinder water pre-heated by the ASHP, the ARDENT boiler is not required to work as hard to raise flow temperatures to the 65°C demanded by commercial applications. Electrical demand on the boiler is reduced by as much as 30%, delivering operational savings and reducing carbon emissions by up to 71%. This variant is perfect for organisations seeking to invest in a water heating application as part of a decarbonisation strategy without losing sight of higher operational costs associated with all-electric systems compared to equivalent gas-fired water heating.

Where hot water demands become a business-critical service, FUSION will also support the addition of an Adveco backup immersion providing additional resilience. Fitted into the front-facing clean-out access, the immersion ensures there is no single point of failure for assured service provision. When only used as an emergency heating source, or during periods of unplanned excess demand, the inclusion of an electric immersion can be extremely advantageous. For FUSION systems incorporating the additional backup immersion (FUSION FPH-Eplus & FPH-Tplus) controls are further extended to incorporate SMS output to advise building managers of a fault scenario and automated engagement of the immersion back-up to guarantee business-critical hot water supply.

For commercial organisations specifying a sink or basin-led hot water system for new buildings faced with regulatory changes on new gas connections, or planning to move from existing gas-fired systems to electrical alternatives FUSION provides an impressive range of choices whether cost, sustainability or business security are the driving factors for specification.

Read more about Adveco FUSION

 

Fusion Packaged Electric Water Heaters

Fusion Packaged Electric Water Heaters

Fusion Packaged Electric Water Heaters

Adveco’s FUSION packaged electric water heaters offer a range of low-carbon, all-electric applications for commercial projects with a wide choice of pre-sized variants.

Next-generation FUSION-E systems harness Adveco’s ARDENT electric boiler and high-pressure ATSI single-coil stainless steel cylinders to deliver a compact, highly-efficient, low-carbon electric water heater. 

FUSION-T adds Adveco’s FPi32 Air Source Heat Pumps, dedicated controls and metering, for further carbon reduction and operational cost savings. 

FUSION -Eplus and FUSION-Tplus meet the needs of organisations where hot water supply is a critical operation function, with the addition of an electric immersion and automation controls for assured supply. 

For commercial organisations specifying a hot water system for new buildings faced with regulatory changes on new gas connections, or planning to move from existing gas-fired systems to electrical alternatives FUSION packaged electric water heaters provide an impressive range of choices whether cost, sustainability or business security are the driving factors for specification. 

 

Features & Key Technologies

Applications

FUSION packaged electric water heaters, through a mix of physical design and dedicated controls, ensure the electric boiler, ASHP preheat and immersion work seamlessly to deliver the highest operational efficiencies.

FUSION’s dedicated controls also incorporate a set of submetering options to monitor the boiler, heat pump, immersion and water flow. This provides clear sight of energy and water usage to better manage day-to-day operations. Timer controls and remote control via BMS ensure FUSION is only operating when required, maximising energy demands and reducing carbon emissions.

The Adveco FUSION is the perfect response for new build commercial properties as well as refurbishment projects seeking to reduce a building’s carbon footprint. FUSION-E can deliver carbon emission reductions of up to 38% when compared to equivalent gas-fired water heating systems, but the addition of a heat pump offers even more, reducing carbon by 53% compared to direct electric systems and by 71% compared to gas. Offsetting the direct electric energy demands, by as much as 30%, also means FUSION can help daily control energy costs.   

ATSI and ATSH cylinders with dedicated mounting points for the electric boiler give FUSION a compact, space-saving form factor. With all connections and clean-out located to the front of the cylinder and with pre-built pipework, FUSION is now quicker and easier to install, even in the tightest of plant room corners, yet remains easily accessible for maintenance.  

Providing continuous recovery, FUSION is able to meet hot water demands for small to medium businesses, such as offices, retail, cafes, restaurants and even smaller schools with basin and sink-led requirements.

When these businesses depend on a consistent day-long supply of hot water, whether restaurants or healthcare facilities, FUSION provides an assured supply. Tough enough to resist corrosive soft water, and able to leverage the advantages of indirect heating to mitigate limescale in hard water areas, FUSION lends itself to a wide mix of commercial applications no matter the water quality. For total resilience, the addition of an automatic backup electric immersion system (FUSION Eplus & FUSION Tplus) brings complete peace of mind.

Options

FUSION-E

  • High-quality ATSI single coil stainless steel vessel with mounting points & brackets
  • Available with 200, 300 or 400-litre capacities
  • Cylinder pressure 10 bar as standard
  • 9, 12 or 24 kW electric boiler
  • Pre-built pipework (left or right)
  • Thermostat and overheat thermostat
  • Compact space-saving form factor
  • Nine pre-sized variants from 9 to 24 kW

FUSION-Eplus

  • 6 or 12 kW electric immersion
  • FUSION Control Box & remote alerts
  • Nine pre-sized variants from 9 to 24 kW

FUSION-T

  • High-quality ATST twin coil stainless steel vessel with mounting points & brackets
  • Available with 300, 400 or 500-litre capacities
  • Cylinder pressure 10 bar as standard
  • 9, 12 or 24 kW electric boiler
  • 6 or 10 kW air source heat pump
  • Pre-built pipework (left or right)
  • FUSION Control Box
  • Compact space-saving form factor
  • 15 pre-sized variants from 15 to 34 kW

FUSION-Tplus

  • 6 or 12 kW electric immersion
  • FUSION Control Box & remote alerts
  • 15 pre-sized variants from 15 to 34 kW

Download the FUSION brochure

Technical Specifications & Downloads

Contact Us

UK (Head Office)

Download our Product Guide

Why Choose Adveco

fifty-year-history-logo

50 Years

Adveco Ltd. is the independent hot water specialist for the commercial built environment and has historically traded as A.O. Smith Water Heaters in the UK.

highest-quality-products-and-services-logo

Highest quality products and services

We prioritise our clients’ needs to deliver bespoke, practical systems.

full-after-sales-support-logo

Full aftersales support

Maintenance and service packages, commissioning, spares, warranty and technical support for your application.

Live Metering

Live Metering
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Live Metering

Data gathering, sizing and bespoke system recommendation for commercial properties intending to replace legacy gas systems.

Live Metering supplies business-critical information to create more sustainable applications that are optimised to meet all hot water storage and delivery demands. All while critically operating within the capability of the existing electrical supply of the building for the most cost-effective transition and insight into future operations

Theoretical design day (Average Day + Uprated Peak Demand)

Features & Key Technologies

More Information

Live Metering requires an Adveco engineer to visit your site and install a water meter to provide hot water temperature monitoring for verified water data and comment on the risk of the existing system.

  • Adveco will return within the month to collect the meter. During these visits, we can confirm space and clearances, and installation suitability, and once we have analysed the data give a truly accurate sizing and emissions/costs calculation.

Through discussion we will aim to answer these questions:

  • Is the new hot water system going to be gas-fired, or electric?
  • Will the new system have a renewable source?
  • If so, will it be ASHP or solar thermal?
  • What level of redundancy or backup is required?
  • The metering data will then allow us to select the hot water system power, the tank sizes, and the renewable size.

Adveco can then advise on a new hot water system which meets the demands of a building while increasing efficiency, lowering carbon emissions, and managing costs.

Running costs will be determined by hot water use and energy prices rather than the size of the water heater. By moving from gas to electric price per kW will currently increase and should be factored into sustainability strategies. 

But the building’s electrical supply will define the system’s capability. If greater amperage than what is currently available is required by the project then initial costs can be expected to soar.

For this reason, factual data recorded during metering is critical for optimising application design so that energy input and water storage meet actual demands, and so that organisations can calculate future operational costs and carbon savings.

 

Report Data

  • – Building type and occupancy
  • – Current system & performance
  • – Hot water provision
  • – Plant room or systems assessed for restraints
  • – Record of any non-regular events that may impact demands during testing
  • – Typical daily/weekly water usage trends and tasks requiring hot water (occurrences, quantities & times)
  • – Current Gas & electricity prices

Metered data

  • – Average daily usage in litres
  • – Max daily usage in litres
  • – Measured peak period in 6 /18/ 30/60/120/180-minute intervals to enable easy percentile calculation as needed
  • – Measured peak demand (date & time of occurrence). All the data collected is used to find the absolute biggest peaks in each of the time periods and plot them graphically and the 30-minute data on either side to give context.

Interpretation and Recommendations

  • – Design Cold feed temperature
  • – Theoretical design day hot water consumption & number of peaks. Theoretical Design is created from the average data being overlayed alongside the peak graphs. Each data point is chosen based on each maximum from either the peak or average. Demand uprate presented as a percentile for the system to be sufficient to provide hot water for the building.
  • – Demand margin uprated with design storage and power required to support the selected system

System recommendations include:

    • – Design percentage at 120% to allow for assured hot water provision, especially during peak operation
    • – kW of the system
    • – Storage size in litres
    • – Supply temperature °C
    • – Storage Temperature °C
    • – Design cold feed °C
    • – Performance overview
    • – Peak periods the system will cover and performance over the peaks
    • – Estimated yearly consumption in litres, enabling estimation of yearly kWh, carbon emissions (kg) and estimated annual running costs.

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Why Choose Adveco

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50 Years

Adveco Ltd. is the independent hot water specialist for the commercial built environment and has historically traded as A.O. Smith Water Heaters in the UK.

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Highest quality products and services

We prioritise our clients’ needs to deliver bespoke, practical systems.

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Full aftersales support

Maintenance and service packages, commissioning, spares, warranty and technical support for your application.

EB and E Immersion Heaters

EB and E Immersion Heaters

EB and E Immersion Heaters

The Adveco EB and E series are a range of electric immersion heaters and kits for use with water heating systems. Ideally suited as primary or backup heat sources in a wide variety of applications, they are an excellent choice for low carbon top up heating when paired with renewables. Installation of supplementary electric immersion heaters also grants a reliable level of reserve heating capacity in the event of a primary heat source failure.

Features & Key Technologies

Options

Adveco’s Immersion heaters boast a Nicalloy 825 sheath with stainless-steel flange and gasket. Connecting directly into the clean-out access or side port of its compatible range of tanks, they are capable of reaching operating temperatures of up to 90°. The EB and E rangers offer a choice of 25 electric immersions with outputs ranging from 3 to 36 kW and operating pressures up to 6 and 10 bar.

All heater kits additionally contain the required Control thermostat & overheat cut-out thermostat and pockets for use with the heating elements as standard. All heating elements are available in multiple flange sizes or as standalone elements, allowing maximum compatibility with a large number of vessels.

Immersions with dual heating circuits (EB0027) supply electrical output through its primary circuit, with a secondary circuit providing a variable heating intensity based on periods of demand, for use with differential tariff supplies, or to provide 50% redundancy backup to the primary immersion heater circuit, depending upon how it is controlled. This ensures a continuous supply of hot water even in the event of a primary heater failure, virtually guaranteeing a hot water supply so long as there is power to the building.

Additional Options

  1. Pocket mounted combination control & overheat thermostat for primary heater
  2. E0049 Control Panel with auto-changeover function in event of a fault & BMS fault output

Additional Information

  1. Multiple immersions can be used
  2. Not recommended as a primary heat source in hard water areas
  3. Electric immersions are easy to install/replace but should be regularly maintained
  4. For electric as a primary heat source or for electric heating in harder water areas Adveco recommends use of an indirect ARDENT electric boiler.
  5.  

Technical Specifications & Downloads

View table as a PDF (43kb)

Model
Capacity [kW]
Immersed Length [mm (in)]
Phase Input
Heat Intensity [W/cm2]
EB0014; E0021
3
375 (14.75'')
1 or 3
8.7
EB0015; E0022
6
460 (18.1'')
1 or 3
9.2
EB0016; E0023
9
460 (18.1'')
1 or 3
9.4
EB0017; E0024
12
510 (20'')
3
9.2
EB0018
18
460 (18.1'')
3
9.4
EB0019A
24
510 (20'')
3
9.2
EB0021A
36
510 (20'')
3
9.1
EB0027
18 + 9
510 (20'')
3
9.2

Contact Us

UK (Head Office)

Download our Product Guide

Why Choose Adveco

fifty-year-history-logo

50 Years

Adveco Ltd. is the independent hot water specialist for the commercial built environment and has historically traded as A.O. Smith Water Heaters in the UK.

highest-quality-products-and-services-logo

Highest quality products and services

We prioritise our clients’ needs to deliver bespoke, practical systems.

full-after-sales-support-logo

Full aftersales support

Maintenance and service packages, commissioning, spares, warranty and technical support for your application.

Adveco Solar Thermal

Adveco Solar Thermal

Faced with an increasing expectation to become more actively sustainable, as well as mitigating rising energy costs, commercial organisations need to give greater consideration to the integration of a solar thermal heating system as part of their premises. Not only a proven and extremely reliable technology, solar thermal offers a clear path to reducing CO₂ emissions.

From offices to healthcare, hospitality, schools and leisure, if, as a business, you are using large amounts of hot water, then solar thermal is potentially an ideal technology, particularly if an application is for a new build project.

Additionally, solar thermal lends itself to working in conjunction with other conventional heating and renewable technologies. This is critical, as a solar thermal system alone, typically would not be able to generate a business’s total energy requirements to meet the year round demands for domestic hot water (DHW). Correctly designed and sized, the solar thermal system can generate a substantial proportion of the hot water requirements, enough to reduce reliance on the gas boiler, especially during summer months. This alone can result in considerable savings in the overall energy overheads of the business.

Adveco specialises in design for solar thermal and can support you installation needs.

For installers wishing to offer solar thermal services Adveco can provide installation training via CPD and onsite instruction.

Awards won by Adveco

Features & Key Technologies

Featured Case Study: The New Benchmark In Sustainable Building

100 Bishopsgate is the latest prestige construction project in the financial district of the City of London. Operated by Brookfield Properties, the development is a stunning all-glazed tower offering 37 floors of mixed-use that has been designed and constructed to meet the highest standard of efficiency, achieving an ‘Excellent’ BREEAM rating to maximise sustainability and reduce the carbon footprint over the lifetime of the building.

Solar panels, part of a solar thermal commercial hot water system.

FAQs

This panel is deliberately left hidden.

Before committing to a solar thermal system, it is vital to consider a wide range of factors. Besides maximising the efficiency of the appliance, it is equally important to have a sustainable and ecologically sound installation. We have stated how solar thermal systems are ideal for organisation that use and rely on large amounts of hot water (restaurants, hotels, schools, hospitals and larger offices), but it is important to understand that a solar thermal system will not fully replace your existing water heating system and will not provide space heating. The actual percentage of your water heating demand covered by solar thermal will depend on your site and energy consumption habits (though this figure is typically around 30% for commercial sites). A south-facing and unobstructed roof with an inclination of 30° from the horizontal is optimal, though by no means essential as Adveco solar collectors can be installed in a variety of ways: built on roof; built in roof; mounted on walls or on frame construction to achieve inclination on flat roofs.

All areas of the UK are suitable for solar energy technology; however, even minimal shade can greatly reduce a system’s output. If a solar thermal collector suffers significant shade coverage, then the technology will not be applicable and a commercial air source heat pump, such as the Adveco FPi range, may be a preferred option to produce low carbon heat. Assuming the location exhibits no shade issues, Adveco’s application engineers will assess a building’s hot water demand and calculate the number of collectors and size of the storage vessel to correctly size an application.

Solar thermal systems are most productive in the summer months, when there is most sunlight, resulting in the additional need for non-renewable energy sources during the winter months. Despite this sustainability is more than achievable, and Adveco will package the appropriate technology.

The A.O. Smith SGS solar water heater with ITE storage vessel is a perfect example of a sustainable application. The intelligent solar control of the system ensures maximum efficiency. Even with little solar input, the required hot water temperature is guaranteed by the gas burner operating as a back-up system.

Solar thermal.

As with any water heating system, every application is unique and this demands a bespoke approach Especially when it comes to correctly sizing the solar thermal system, which will ensure the design is optimised for the application and will therefore operate efficiently.

First, a correctly sized system will consider the daily usage and peak demands. Its aim is to serve all peaks from storage, with the size of the peak determining the size of pre-heat. The recovery time for peaks is what ultimately determines number of collectors a building requires.

Second, the design process needs to size usage with available space. So, sizing considers whether the site is flat, pitched or vertical and the type of construction, its direction and shading. Length of pipe run is also important, if collectors are located a considerable distance from the plant the system’s thermal losses could be significantly detrimental to efficient operation.

Together this enables calculation of the Solar Fraction, the total annual heat for hot water compared to total available from solar inputs. To this is then added the details of other energy heaters (typically gas) that are to be used, to fully visualise the completed system.

For buildings already on gas and that rely on large amounts of domestic hot water (DHW) – a large proportion of current commercial UK properties – solar preheat is the preferable option. Depending on the building and energy consumption habits, solar thermal will typically provide around 30% of the hot water demand.

If electrical costs can be offset by adopting solar thermal pre-heat and a gas water heater to meet peak demands, then the numbers can be very favourable. A ten-year return on investment becomes very achievable and the property gains undisputed carbon and cost savings.

Such hybrid approaches are unavoidable for commercial projects seeking a path to low carbon hot water and is the most sensible, practical, and cost-effective option. By using solar thermal with gas after heat, commercial organisations can actively drive sustainability and retain control of operational expenditure for decades to come. With hydrogen policy to be confirmed in 2026, retaining gas in existing commercial buildings keeps options open and future-proofs a building for other emerging heating technologies.

Contact Us

UK (Head Office)

Download our Product Guide

Why Choose Adveco

fifty-year-history-logo

50 Years

Adveco Ltd. is the independent hot water specialist for the commercial built environment and has historically traded as A.O. Smith Water Heaters in the UK.

highest-quality-products-and-services-logo

Highest quality products and services

We prioritise our clients’ needs to deliver bespoke, practical systems.

full-after-sales-support-logo

Full aftersales support

Maintenance and service packages, commissioning, spares, warranty and technical support for your application.