HVAC The hourly heat loss H (in Btu) through a uniform slab of material can be calculated using the following formula:
where A is the area of the slab in square feet, Ti and To are the inside and outside temperatures in degrees Fahrenheit, and R is the thermal resistance of the slab.
Calculate the hourly heat loss through 672 sq ft of walls with an R-value of 19.5 if Ti is 68°F and To is 42°F.
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Mathematics for the Trades: A Guided Approach (11th Edition) (What's New in Trade Math)
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