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  1. #27
    Join Date
    Jan 2004
    Originally posted by tostaos
    If it helps I installed a Ruud, (Rheem), 60K BTU mod furnace in my home this fall. My old furnace was an oversised 80K BTU York 92% that was running fine. My gas usage is 40% less than it was a year ago! No other changes in life style to credit the savings to. With my old furnace I ran the blower anbout 6 hours a day, the Ruud hac been running 24/7 since the install. My electric usage has jumped so I think the blower will be set back to the old running times.
    If you have a 60K BTU or a 120K BTU furnace of the same efficiency, they will both use close to the same amount of gas per 1000 BTU load, the larger one will just heat up the house quicker. Just keep that in mind. [/B][/QUOTE]

    Thats only true if you have the duct work to handle the air that the 120 would need.

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  2. #28
    Join Date
    Nov 2005
    Thats only true if you have the duct work to handle the air that the 120 would need.


    Yes, I just assumed that. In my part of the country that is normally always the case, the oversized furnace is in the house due to unavailability at the time of a smaller furnace with enough airflow for the required ac capacity. In the last view years, the manufacturers offer better choices, that means furnaces for small heat load, large cooling load.

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