A hybrid commercial heating system from Ideal Commercial Heating, featuring ECOMOD heat pumps and Evomax 2 boilers, has been installed at Hawthorn Primary School in Cantley, Doncaster. The system provides a reliable, lower-carbon solution to improve comfort and efficiency across the site.
Hawthorn Primary School is a co-educational primary academy with a campus comprising several buildings of varying ages and construction types, creating challenges for consistent temperature control and system performance. The existing heating infrastructure, which consisted of two ageing openflued boilers alongside undersized pipework, had struggled to meet demand efficiently, resulting in high gas consumption and unreliable comfort levels, particularly during colder months.
Ideal Commercial Heating customer Service 2 (HVAC) was appointed to design and install a new system. The completed installation is a hybrid system combining two 50kW ECOMOD 290HT air source heat pumps with three wall-mounted Evomax 2 150kW commercial condensing boilers operating in cascade providing 450kW of output.
The heat pumps are located externally adjacent to the plant room and feed buffer vessels, while the Evomax 2 boilers are installed internally on an Ideal Heating frame and header kit, with pre-formed insulation kits and a plate heat exchanger to ensure separation between the primary and secondary circuits. This allows the heat pumps to satisfy most of the school’s heating and hot water demand throughout milder seasons, with the boilers providing support during the colder months.
A building management system plays a central role in maximising efficiency by selecting the most appropriate heat source depending on weather conditions and load requirements. As the project involved an existing facility rather than a newbuild, the system was designed to integrate with much of the original distribution infrastructure.
Chris Snowden, Technical Operations Manager at Service 2 (HVAC), said: “The benefit of using the ECOMOD 290HT heat pumps within the system is we can create up to 75°C hot water, which means you don’t have to change radiators. We can still run on the original system.”
Fan coil units optimised for lower temperature operation were installed in selected areas to further enhance system performance. To provide separation between the primary and secondary circuits, preventing potential dirty system water from circulating through the new equipment, an Ideal Heating plate heat exchanger (PHEX) was installed. www.idealcommercialheating.co.uk