Solar panels that use sunlight to heat water.
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Solar photovoltaic panels that generate electricity.
Heat gained from sunlight entering a building, especially through windows.
A meter that records energy use and sends readings automatically to the supplier.
A place where pipes, cables or ducts pass through the building fabric. Poorly sealed penetrations can cause draughts and heat loss.
An additional pane or frame fitted inside an existing window to improve thermal performance, comfort and noise reduction.
A measure of heat pump performance over time, comparing useful heat output to electricity input.
A seasonal measure of heat pump efficiency over a period of heating operation.
Standard Assessment Procedure. The UK method for assessing the energy performance of new dwellings.
A measure of thermal resistance. Higher R-values mean better resistance to heat flow.