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Stupid BER question

Mad Benny · 2016-05-18 10:38:06

If two houses have the same Building Energy Rating e.g. B3 133.4 (kWh/m2/yr) and one house is 100m2 and the other is 300m2, would both have the same annual heating bill?

18-05-2016 11:38am

#1

Mad Benny

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If two houses have the same Building Energy Rating e.g. B3 133.4 (kWh/m2/yr) and one house is 100m2 and the other is 300m2, would both have the same annual heating bill?

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#2 18-05-2016 12:09pm

Mad Benny

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I think I've found the answer to my stupid question

The BER "is expressed as primary energy use per unit floor area per year (kWh/m2/yr)". So I would expect the 300m2 house to have a heating bill three times the 100m2 house.

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#3 21-05-2016 4:51pm

caesarthechimp

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Correct.
And also you might expect that the smaller house is probably of a better quality. Because its usually harder for a small house to achieve the same BER as a big house (unless the smaller one is actually an apartment). Due to the large exposed surface area compared to its floor area.

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