therm
/θɜrm/
noun
- A unit of heat energy, especially used for measuring natural gas; equal to 100,000 British thermal units (BTU).
- A therm is roughly equivalent to the heat from burning about 100 cubic feet of natural gas.
- Our monthly gas bill shows we used 75 therms of natural gas.
- The furnace efficiency rating tells you how much heat you get per therm of gas.