Iceverge Posted 3 hours ago Posted 3 hours ago 58 minutes ago, JohnMo said: Going passivhaus on a small building isn't worth the effort as with some insulation heat costs are tiny. Not even sure a diesel heater is worth the effort, small storage heater, electric panel heater or a room through wall heat pump heater, sized at about 1+kW I assumed there was no mains electric but a £10 fan heater would be fine if there was. I have a 2m mini office. Good airtightness, 0.23W/m²K walls and 1W/m² 2G doors and a 3G window. dMEV. Average U value of 0.35W/m²K. Once it's up to temp a couple of hundred Watts keeps it cosy.
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