19-06-2019, 03:22 PM
Not only heatpumps. Condensing boilers are more efficient when the flow temperature is 55 to 60C. If your radiators are sized for 70C flow as is traditional then a condensing boiler will be less efficient. Still better than a non-condensing type but not as good as it might be.
Nick is in the fortunate position of having built from scratch. Was your house to Passivhaus standards? A house like this barely needs a central heating system at all though of course it still needs hot water. In a Passivhaus you can probably make a case for using direct electric heating for the small amount that's needed. The extra cost of a heatpump etc may not be worth it. Solar hot water (often only pre-heat in the UK) and PV would be standard on a Passivhaus.
Nick is in the fortunate position of having built from scratch. Was your house to Passivhaus standards? A house like this barely needs a central heating system at all though of course it still needs hot water. In a Passivhaus you can probably make a case for using direct electric heating for the small amount that's needed. The extra cost of a heatpump etc may not be worth it. Solar hot water (often only pre-heat in the UK) and PV would be standard on a Passivhaus.
www.borinsky.co.uk Jeffrey Borinsky www.becg.tv
