What Is a Therm on a Laundromat Gas Bill?
Last reviewed 2026-09-12 by Jaken Energy editorial desk. Next review scheduled 2027-03-12.
Direct answer
A therm is a unit measuring natural gas energy equal to 100,000 British thermal units. Laundromat gas bills bill dryer and water heater consumption in therms or convert CCF/CCF readings to therms using heating content factors. Tracking therms month to month separates usage changes from commodity rate changes.
Definition: Therm
Utilities and gas suppliers multiply metered volume by heating content to report therms. Commercial laundromats with gas dryers often consume more therms in winter when space heating shares meters or when incoming water is colder, increasing water heating load.
Comparing therms per operating day or per revenue dollar helps owners spot equipment faults independent of $/therm supply moves.
Laundromat example
A store uses 4,200 therms in January versus 2,800 in April with similar coin volume because the same meter serves dryers and rooftop heating units, not because dryer efficiency changed.
Related terms
Sources
- EIA Retail Choice FAQ — U.S. Energy Information Administration
Supports: Utility still delivers in choice states; supply may be separate
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