When it comes to the provision of domestic hot water (DHW) as part of the drive to deliver greater sustainability within commercial building projects there remains a consensus that currently there is no single ‘silver bullet’ technology able to deliver all the answers.
Until decisions are finally made in 2026 on a hydrogen-based future, the government’s stance is set on electrification, the creation of heat networks and the installation of heat pumps. For organisations looking for a quick sustainability win then heat pumps provide a clear opportunity, so long as the property is a new build. For new commercial builds, consultants are already specifying a greater electrical load to account for the additional power demands to support a mixture of heat pumps and direct electric afterheat necessary to meet the higher water temperatures and volume demands exhibited in commercial projects. New DHW systems will predominantly follow this model, taking advantage of heat pump performance efficiencies to create a hybrid approach to deliver pre-heating for as much as 75% of the water in a direct electric system. And with no gas to the building, no local generation of NOₓ and no flue to install this clearly has its advantages.
With 50 years of specialist experience in creating bespoke commercial DHW systems, Adveco is well-positioned to support such projects with a wide range of air source heat pumps, indirect tanks and electric immersions.
Compatible with existing DHW distribution systems with higher thermal requirements, the FPi32 ASHP range is ideal for integration into a hybrid hot water system. Transferring heat from the air to a building, the FPi32 can provide a working flow of hot water at 55°C throughout the year, even when ambient air temperatures drop as low as -25°C. When combined with either a gas or electric water heater and controls, the FPi32 helps reduce emissions and increases efficiency without compromising reliability or performance.
The three models, available in 6, 9 and 12kW variants provide a low carbon source of hot water in a more compact, quieter, more efficient and easier to install unit. The FPi32 also sits at the heart of two pre-sized offerings, FUSION and the e-32 Packaged Hot Water System. For organisations with small to medium basin and sink led hot water demands, FUSION offers 16 pre-specified variants. With a choice of 6 or 10 kW preheat and 9 or 12 kW electric top-up, FUSION offers capacities ranging from 200 to 500 litres all rated at 10 BAR for high-pressure applications. Combining the FPi32 with a high-pressure ATSH calorifier with electric immersion, controls, and metering, FUSION systems are able to meet a range of continuous capacity hot water demands from 257-377 litres/hour for a wide range of commercial buildings.
Where space is at a premium, the e-32 Packaged Hot Water System comes into its own. This prefabricated all-electric water heating system uses an FPi32-9, a 200L GLC indirect preheat tank and a 200L GLE direct electric water heater all housed in a compact GRP housing. This ‘plant room in a box’ can be conveniently positioned externally on flat roofs or in unused or ‘dead’ spaces. This makes the system ideal for a wide range of commercial properties with regular hot water demands such as restaurants and boutique hotels, offices, schools, and light industry. The system is also exceptionally useful if refurbishing existing building stock.
For projects with greater DHW demands, Adveco’s L70 high-capacity air-to-water monobloc heat pump is rated 70kW for typical UK operation at 5°C but climbing to a maximum 90 kW from a single compact unit. With a seasonal coefficient of performance (SCOP) as high as 4.08 the L70 is perfect for large scale commercial applications and can operate as part of a cascade installation for projects demanding greater capacity.
Able to draw and transfer thermal energy from the air, under the right circumstances, such as new builds with a high degree of insulation, ASHPs represent an efficient way to significantly reduce the carbon emissions of a building. As the cost of grid electricity closes on that of gas, ongoing savings garnered from operating a hybrid ASHP based system, plus the reduction in CO₂ emissions makes the technology a truly attractive prospect for the latest commercial building projects. New innovations in heat pump technology and refrigerants this coming year will further enhance the advantages of the technology cementing it position as a truly viable alternative for the provision of commercial-grade hot water.