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The British thermal unit ( Btu) is a measure of heat, which is a form of energy. It was originally defined as the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit. It is also part of the United States customary units. [1] The SI unit for energy is the joule (J); one Btu equals about 1,055 J ...
Under the pre-2015 standard, a 75 US gal (280 L; 62 imp gal) gas storage water heater with a nominal input of 22 kW (75,000 BTU/h) or less was able to have an energy factor as low as 53%, while under the 2015 standard, the minimum energy factor for a 75-US-gallon gas storage tank water heater is now 74%, which can only be achieved by using ...
And while you can switch, this is largely determined by what kind of power your old system ran on. Gas water heaters cost between $600 and $2,700 to replace, for an average cost of about $1,650 ...
Gas water heaters have an exhaust vent or one to two exhaust pipes on the top, and still require electric power for electronics, sensing and ignition. A three-phase, 21 kW, 400-volt tankless water heater in Europe, with new European color coding for three-phase power. There are also heaters that use several single-phase circuits instead.
June 30, 2024 at 7:43 AM. These are the best deals to shop during Amazon's 4th of July Sale — save up to 90%. It's almost the 4th of July, and there are deals and savings to be had. While we're ...
June 20, 2024 at 8:00 AM. What's Your Fancy: Emma Hearst's 7 Must-Haves. "Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Hudson, New York, the ...
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