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How to choose suitable size of furnace?
I have a question. My home is bungalow with 1300 sq. feet. on the main floor and the same size of footage in the basement. I want to heat them up together. I live in Calgary, Alberta. My question is how I have to choose size and capacity of future furnace? I had two contractors and they gave my two different type of furnace. One is EL296UH090XV36C and another EL296UH070XV36B. All them from LENNOX. How I have to choose right one?