Convert °f·hour/btu (th) to °f·hour/btu (it)

Please provide a value.
Please provide a value.

°F·Hour/Btu (th)

The degree Fahrenheit hour per thermochemical British thermal unit (°F·h/Btu(th)) is the thermochemical variant of the imperial thermal resistance unit. It uses the thermochemical BTU (1054.35 J) rather than the IT BTU (1055.06 J) and is applied in precise thermochemical engineering calculations. 


°F·Hour/Btu (IT)

The degree Fahrenheit hour per British thermal unit IT (°F·h/Btu) is an imperial unit of thermal resistance used in North American building and HVAC engineering. One °F·h/Btu equals approximately 1.8958 K/W. It is related to the R-value used in building insulation ratings. 


°F·Hour/Btu (th) to °F·Hour/Btu (IT) conversion table
°F·Hour/Btu (th)°F·Hour/Btu (IT)°F·Hour/Btu (IT)°F·Hour/Btu (th)
11.0006710.999331
22.0013421.99866
33.0020132.99799
55.0033554.99666
1010.0067109.99331
2020.01342019.9866
2525.01672524.9833
5050.03355049.9666
100100.06710099.9331
250250.167250249.833
500500.335500499.666
10001000.671000999.331
How to convert °F·Hour/Btu (th) to °F·Hour/Btu (IT)

1 °F·h/Btu(th) = 1.00067 °F·h/Btu. To convert any value, multiply it by 1.00067. For example, 25 °F·h/Btu(th) = 25.0167 °F·h/Btu.

Frequently asked questions
How many °F·h/Btu are there in one °F·h/Btu(th)?
One °F·h/Btu(th) is equal to 1.00067 °F·h/Btu.
How do you convert °F·Hour/Btu (th) to °F·Hour/Btu (IT)?
Multiply the value in °F·Hour/Btu (th) by 1.00067 to get the result in °F·Hour/Btu (IT).
How much is 25 °F·h/Btu(th) in °F·h/Btu?
25 °F·h/Btu(th) is equal to 25.0167 °F·h/Btu.
How do you convert °F·Hour/Btu (IT) back to °F·Hour/Btu (th)?
Divide by the same factor: multiply the value in °F·Hour/Btu (IT) by 0.999331 to get °F·Hour/Btu (th).

Most common thermal resistance unit conversions