HVAC · HVAC · Problem 8
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HVAC · HVAC · Problem 8
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Problem: A single family house is maintained 70 degrees in the winter when the outside design temperature is 10 degrees.
Given: 100 CFM of air exchange; 1.08 CFM Delta T; 1.08 CFM Delta T
Approach: The roof area is 2000 square feet and the R value is R32.
Calc: Infiltration and ventilation account for 100 CFM of air exchange.
Calc: In this case it's cold out so it's being heated from 10 to 70.
Result: Best answer choice is D.
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