Worcester House
Case study · Residential
Worcester House
A new open-plan extension gained discreet heating and cooling late in the build, without disturbing its minimalist white interior.
- Sector
- Residential
- Project
- 110 m² extension
- Energy source
- Air source heat pump
- Outlets
- Flush round ceiling outlets
- Zones
- Living area and office
The challenge
The extension is airtight, with roof lights and large areas of glazing, so solar gain was set to make the open-plan living space and office uncomfortable. By the time air conditioning was considered, the structure was complete: there was no room between the ceiling joists for main ducting and nowhere inside for an air handler. Whatever went in also had to sit quietly within a pared-back interior.
The solution
The main ductwork and a slimline 10 kW air handler, only 225 mm deep, were mounted on the outside wall beside the heat pump, inside insulated, acoustically lined duct sections and a cedar-finished weatherproof cupboard. From there, 28 flexible supply tubes run to the rooms, with two dampers providing separate control of the living area and the office.
The result
Flush white outlets sit around the edges of the ceiling, with pairs set into the skylight recesses to deal with solar gain where it enters. The temperature varies by no more than about 1°C from floor to ceiling, the system responds quickly and it is very quiet. The homeowner was able to add air conditioning at a late stage without compromising the design.
“I am very pleased with Invisible.AC in terms of the performance of the system and the thought given to its design. It has enabled us to include air conditioning at a late stage of our building plans.”
Installed in collaboration with Invisible.AC. Photography courtesy of Invisible.AC.
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