FACT: houses contain 4 litres of water as vapour

Houses contain about 4 litres of water as vapour. A normal house typically contains 10 grams per cubic meter at 65%RH at 20°C. A 2.5M high room and foot print of a house is 150M2 = 375 x 10 = 3,750 g or 3.7 litres. (1,000 grams in a litre)

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