Definitions for THERMθɜrm
This page provides all possible meanings and translations of the word THERM
Random House Webster's College Dictionary
any of several units of heat, as one equivalent to 1000 large calories or 100,000 British thermal units.
Origin of therm:
1885–90; < Gk thérmē heat
var. of thermo- before a vowel:
var. of thermo- as a final element:
a unit of heat equal to 100,000 British thermal units
A former unit of heat equal to 100,000 British thermal units
Natural Gas is usually measured by volume in the United States and is stated in cubic feet. A cubic foot of gas is the amount of gas needed to fill a volume of one cubic foot under set conditions of pressure and temperature.To measure larger amounts of natural gas, a "therm" is used to denote 100 cubic feet, and "mcf" is used to denote 1,000 cubic feet. To provide greater accuracy in comparing fuels, energy content is measured in terms of "British Thermal Units." A BTU is the amount of heat required to raise one pound of water, one degree Fahrenheit at or close to its point of maximum density. One British therm is a non-SI unit of heat energy equal to 100,000 British thermal units. It is approximately the energy equivalent of burning 100 cubic feet of natural gas. Since meters measure volume and not energy content, a therm factor is used by gas companies to convert the volume of gas used to its heat equivalent, and thus calculate the actual energy use. The therm factor is usually in the units therms/CCF. It will vary with the mix of hydrocarbons in the natural gas. Natural gas with a higher than average concentration of ethane, propane or butane will have a higher therm factor. Impurities, such as carbon dioxide or nitrogen, lower the therm factor.³
The Standard Electrical Dictionary
A unit of heat. It has been proposed by the British Association and amounts to a redefinition of the smaller calorie. It is the amount of heat required to raise the temperature of one gram of water one degree centigrade, starting at the temperature of maximum density of water.
Find a translation for the THERM definition in other languages:
Select another language: