Heat Decarbonisation, Warrington

Walton Hall was built in 1836–38 as the residence for Sir Gilbert Greenall, 1st Baronet, Brewer and Member of Parliament, but is now owned by Warrington Borough Council and used as a wedding function venue. It is Grade II listed but had a modern extension in 2014. Working with APSE Energy, Salvis provided a detailed feasibility study as part of a heat decarbonisation project in the building.

Warrington Borough Council wanted to understand how they could decarbonise the building while maintaining its historical and architectural value.

Detailed heat modelling was undertaken using IES software to size new heat pumps. Different solutions were considered, such as:

• An air source heat pump is located at the rear of the property, with a sound attenuation enclosure and new radiators. Carbon savings = 71 tCO2e.
• A ground source heat pump with coils buried underneath the grounds offers a discreet way to heat the building. Carbon savings = 76tCO2e.
• Replace the fluorescent lights with LEDs. Carbon savings = 0.2 tCO2e
• Secondary glazing installed to the internal side of the windows. Carbon saving 2.0 tCO2e

The feasibility study was used to successfully gain funding under the Public Sector Decarbonisation Scheme and a GHSP was installed with replacement radiators and pipework.