Where a house loses heat: the efficiency checklist before you buy hardware
The cheapest kilowatt hour is the one you no longer need. A clear look at the building first saves money on every device that follows.
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Energy Efficiency
Before buying a heat pump or a larger battery, find out where the house loses energy. Insulation, airtightness, ventilation and a well tuned heating system often cut demand more cheaply than any new device.
5.0 vs 0.7W/m²K: single glazing compared with modern triple glazing
75 to 90 %heat recovered by a good ventilation unit with heat exchanger
10 Kminimum indoor to outdoor temperature difference for useful thermal imaging
Guides in Energy Efficiency
Ventilation with heat recovery: fresh air without losing the warmth
An airtight house needs a planned way to breathe. A ventilation unit with heat recovery provides it and keeps most of the heat inside.
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