What percentage of energy (on average) is used for water heating in residential buildings?
In a Facebook poll of 33 respondents, 51.5% chose “20-30%”. How we count
20-30%
51.5%17
10-20%
21.2%7
30-40%
21.2%7
40-50%
6.1%2
More than 50%
0%0
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