Ads
related to: heat btu per square footsupplyhouse.com has been visited by 100K+ users in the past month
Search results
Results from the WOW.Com Content Network
For one square foot of the insulation, one Btu per hour of heat flows across the insulator for each degree of temperature difference across it. 1 therm is defined in the United States as 100,000 Btu using the Btu 59 °F definition.
Measured in square feet, the reference standard for EDR is the mattress radiator [1] invented by Stephen J. Gold in the mid 19th century. One square foot of EDR is able to liberate 240 BTU per hour when surrounded by 70 °F (21 °C) air and filled with steam of approximately 215 °F (102 °C) temperature and 1 psi of pressure.
Although the concept of U-value (or U-factor) is universal, U-values can be expressed in different units. In most countries, U-value is expressed in SI units, as watts per square metre-kelvin: W/(m 2 ⋅K) In the United States, U-value is expressed as British thermal units (Btu) per hour-square feet-degrees Fahrenheit: Btu/(h⋅ft 2 ⋅°F)
For premium support please call: 800-290-4726 more ways to reach us
kelvin square-metre per watt (K⋅m 2 /W or, equally, °C⋅m 2 /W), whereas the I-P (inch-pound) unit is degree Fahrenheit square-foot hour per British thermal unit (°F⋅ft 2 ⋅h/BTU). [13] For R-values there is no difference between U.S. and Imperial units, so the same I-P unit is used in both.
In general, the recommendation is to allow 20 BTUs per square foot for indoor heating purposes. Even patio heaters with a generous 50,000 BTU output will only raise the surrounding temperature ...
Ads
related to: heat btu per square footsupplyhouse.com has been visited by 100K+ users in the past month