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  1. #14
    Join Date
    Jan 2004
    Location
    PA
    Posts
    78,021
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    Quote Originally Posted by RSWAFFER View Post
    The 115 - 120 degree temperature output is too high based on Temperature Rise = BTU divided by 1.08 times CFM.
    90% Furnace 45,000 B.T.U. Imput.....40,500 B.T.U. Output
    800 CFM.....116.9 degrees
    1000 CFM....107.5 degrees

    80% Furnace 40,000 B.T.U. Imput.....32,000 B.T.U. Output
    800 CFM.....107 degrees
    1000 CFM...99.6 degrees
    Why do you think the furnaces are moving either 800, or 1,000 CFM. Why not 750 CFM. Which would give a 50°F temp rise.
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  2. #15
    Join Date
    Mar 2015
    Location
    Quebec
    Posts
    18
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    Carrier Edge Thermostats let you adjust the deadband between heat and cool


    Envoyé de mon iPhone en utilisant Tapatalk

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