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So, a furnace with 100,000 BTU/90% AFUE will use 100,000 BTUs of fuel per hour and convert it to 90,000 BTUs of heat for your home.
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So, a furnace with 100,000 BTU/90% AFUE will use 100,000 BTUs of fuel per hour and convert it to 90,000 BTUs of heat for your home.
Feel free to visit my site - [url=https://Shor.by/coolitheati]Shor.by[/url]