The Old Rectory gets air source

EcoPlumb have recently completed an installation of a Mitsubishi Ecodan Air Source Heat Pump in North Wootton, King’s Lynn, Norfolk. This was done in association with Ice Energy and Town and Country Developments.

The building was a Studio Annex, a 50m2 1 bed house / annex, built in the lea of an old rectory garden wall. All the rooms are oriented south to the light and the garden. The simple profile of the building with a verandah at the front edge shades high angled (more intense) sunlight during the summer, but allows lower angled winter sunlight to penetrate the rooms. The rooms have vaulted ceilings with velux windows at high level over the wall to encourage cross ventilation during the summer.

It is timber framed construction and is insulated above current Part L standards (Walls 0.22; Roof 0.18). The interior is lined with 2 layers of plasterboard to add ‘thermal mass’ (this allows the building to absorb excess solar energy and release it later – smoothing out the diurnal temperature fluctuations). 50% of recoverable heat flow during a diurnal cycle is limited to the first 25mm depth of material – 2 layers of plasterboard should provide a cost effective method of achieving thermal mass on a lightweight building.

The house is has wet under floor heating with pipes in the screed, and is heated using a 5kw air source heat pump – Mitsubish Ecodan. This Heat Pump has now been running for two months on a weather compensated eco mode and more than supplies the energy needs of the building. A £900.00 grant was obtained for this installation under the MCS scheme.

The architect was Emma Adams

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