PHAM NEWS | DECEMBER/JANUARY 2025 40 Products in Action
Low carbon funding helps Welsh school go green
Funding from the Welsh government has helped a Ruthin secondary school decarbonise its heating by replacing gas boilers with Mitsubishi Electric air source heat pumps. Ysgol Brynhyfryd is a bilingual co-educational comprehensive school for over 1,000 pupils aged between 11 and 18 years of age in the beautiful valley of Clywd, in North Wales. The school is maintained by
the Denbighshire Education Authority and the renewable solution was the installation of solar photovoltaic panels on the school roof, along with replacing three gas boilers with two commercial air source heat pumps. “Between the heat pumps and
the solar panels, the school is estimated to save an average of £17 to £19 thousand per year, along with 28 tonnes of carbon,” comments Ben Musgrave, director of JM Renewable Solutions, who installed the systems.
The existing gas boilers were
replaced with two 40kW CAHV air source heat pumps from Mitsubishi Electric. The school has underfloor floor heating throughout. Coupled with this, JM Renewables installed a further 75kW of solar panels on the building’s roof, to help with the running costs. The CAHV heat pumps achieve
70°C water temperatures down to -20°C ambient temperature to deliver continuous heating. Multiple unit cascade control offers capacity from 7.8kW to
640kW to make the system suitable for a wide range of applications. “The heat pumps meet the
design temperature of the school, so it was almost a direct swap from the boilers,” explains Elliot Sullivan, head of mechanical division at JM Renewables. “The efficiency of the heat pumps
installed should be around 300 to 400%, so for every one kilowatt of electricity consumed, it will deliver 3 to 4kW of heat to the building.” ◼
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Ship shape conversion of WC facilities
Saniflo has played a role in converting the historic Sula Lightship, a 1950s era working ship, into a high standard accommodation facility. This project demonstrates Saniflo’s ability to support non-traditional properties where reliable waste management solutions are essential. The company supplied
a range of macerators and pumps to manage on-board black and grey water waste, including a Sanimarin WC, specifically designed for marine applications, and a long- standing Sanishower unit to discharge grey water waste into former freshwater tanks repurposed as storage. These systems provided the
necessary capacity and durability for high-usage scenarios on the vessel. The two Saniflo units in the owner’s living quarters were replaced during the conversion following the recommendation from the Saniflo agent, Pumpmaster, for long-term economic reasons as they were
both over 10 years old and had heavy use. The Sanimarin WC was
specified for the new bathroom because it provided sufficient power to pump through a range of pipes in the chain room below right along to the tanks at the vessel’s stern. The shower was plumbed into the existing Sanishower unit, installed over 15 years ago and still working well. ◼
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