Units of measurement
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BTU per hour per foot per degree Fahrenheit
BTU per inch per hour per square foot per degree Fahrenheit
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BTU per hour per foot per degree Fahrenheit
British thermal unit per hour per foot per degree Fahrenheit — a unit of thermal conductivity, indicating the amount of energy (in BTU) transmitted through 1 foot of material when there is a temperature difference of 1 degree Fahrenheit per hour.
BTU per inch per hour per square foot per degree Fahrenheit
British thermal unit per inch per hour per square foot per degree Fahrenheit — a unit of thermal conductivity, indicating the amount of energy (in BTU) transmitted through 1 square foot of material when there is a temperature difference of 1 degree Fahrenheit per hour.