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For example, a 90% AFUE for a gas furnace means it outputs 90 BTUs of useful heating for every 100 BTUs of natural gas input (where the rest may be wasted heat in the exhaust). A higher AFUE means higher efficiency. The method for determining the AFUE for residential furnaces and boilers is the subject of ASHRAE Standard 103.
In addition to evaluating the design trade-offs that affect the annual energy usage of the home it is also a ranking system. The EnerGuide for Houses scale goes from 0-100 with 0 being the least efficient and 100 being the most energy efficient. In 2005 the average home in Canada had a rating of 66 on the EnerGuide scale.
In 2016 natural gas was used to provide 35% of all energy in Canada, double the amount supplied by electricity. [18] Electricity generated by natural gas was 8.5% of the nation's total. Natural gas is used to supply 50% of space heating, and 65% of water heating in homes, similarly 80% of businesses use natural gas for space and water heating. [19]
Close-up of flames on a natural gas furnace burner in the HVAC system of a suburban home in San Ramon, Calif., Dec. 29, 2019. (Photo by Smith Collection/Gado/Getty Images) (Smith Collection/Gado ...
The fourth category of furnace is the high-efficiency condensing gas furnace. High efficiency condensing gas furnaces typically achieve between 90% and 98% AFUE. [3] A condensing gas furnace includes a sealed combustion area, combustion draft inducer and a secondary heat exchanger. The primary gain in efficiency for a condensing gas furnace, as ...
This is a list of Canadian natural gas companies: ATCO - based in Edmonton, Alberta [1] AltaGas - based in Calgary, Alberta; Anderson; Canadian Natural Resources - based in Calgary; Dejour Energy - based in British Columbia; Direct Energy - formerly based in Toronto and now based in Houston, Texas
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