What is is the best way of measuring a home’s energy efficiency?

Stuart Fairlie

Debate rages about the relative merits of SAP versus Passivhaus. A new research project suggests there is very little difference

Take three experts and get them talking about energy efficiency. I guarantee it will be a great conversation.

Until suddenly, at some point, you will realise that they are each talking about different things. One is waxing lyrical about the benefits of lower carbon homes. Another is talking about space heating demand. And the third is focused on fuel poverty, and the need to reduce overall energy cost.

Consider the design, construction and marketing of green new homes, and you get the same thing. Some are promoted as ultra low energy, some are ‘zero carbon’ or even ‘carbon positive’, and some are celebrated for very low fuel bills.

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