British thermal unit
noun
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Despite its name, the British thermal unit, or BTU, may be more widely used in North America than in Britain. Air conditioners, furnaces, and stoves are generally rated by BTUs. (Though "BTUs" is often short for "BTUs per hour;" in air-conditioner ratings, for instance, "BTUs" really means "BTUs of cooling capacity per hour".) Fuels such as natural gas and propane are also compared using BTUs. The BTU first appeared in 1865 and isn't part of the metric system—the metric unit of energy is the much smaller joule—so it isn't much used by scientists, but its practicality keeps it popular for consumer goods and fuels. A better-known heat unit is the calorie; a BTU is equal to about 252 calories. (Since the familiar food calorie is actually a kilocalorie, a BTU equals only about a quarter of a food calorie.)
Examples of British thermal unit in a Sentence
Dan Eberhart, Forbes, 12 Dec. 2024
The summer and fall have also been volatile — but in the past month, natural gas is up a little over 12% and traded just over $3 per million British thermal units on Friday.
—Kevin Stankiewicz, CNBC, 6 Dec. 2024
There’s lots of room for more buybacks and payout hikes, as CF’s sales and earnings gained in the third quarter, with profits getting an assist from a drop in the price of natural gas, CF’s main feedstock, from $2.58 per million British thermal units a year ago to $2.08.
—Brett Owens, Forbes, 6 Nov. 2024
For example, the Maryland Bioenergy Center is capable of processing up to 110,000 tons of food waste annually, producing 312 billion British thermal units of renewable natural gas and more than 15,000 tons of fertilizer, the Agriculture Dive piece said.
—Sergey Buchin, Forbes, 23 Oct. 2024
Futures for the Dutch Title Transfer Facility (TTF) hub, a European benchmark for natural gas transactions, were trading at $12.78 per million metric British thermal unit on Wednesday on the New York Mercantile Exchange.
—Lee Ying Shan, CNBC, 23 Oct. 2024
Energy Shawn Hill, an expert pitmaster and owner of The Grilling Dad, says to also consider the BTU (British thermal units), which tells you the overall energy a patio heater uses to raise the temperature.
—Jessie Quinn, People.com, 1 Oct. 2024
This Black and Decker Portable Air Conditioner packs 6,000 British thermal units of cooling power into a body that's about the size of a medium suitcase.
—Clint Davis, Peoplemag, 22 July 2024
One British thermal unit is equivalent to 1,055 joules and will raise the temperature of one pound of water one degree Fahrenheit.
—Matthew J. C. Clark, Harper's Magazine, 21 June 2024
Dictionary Entries Near British thermal unit
Cite this Entry
“British thermal unit.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/British%20thermal%20unit. Accessed 25 Dec. 2024.
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