Discussion
The surface to volume ratio of a building is a measure of
Answer: B
Correct answer: how much envelope encloses a given volume
Heat is lost and gained through the envelope while the volume is what must be conditioned, so a low ratio means less exchange for the same accommodation. A compact form therefore starts with an advantage - which is why a cube outperforms a sprawling plan of the same floor area, and why small buildings are harder to insulate to the same standard.
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