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  1. #1
    Join Date
    Apr 2007
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    3 ton or 4 ton compressor

    my house is a 1700 sqft with 13 ft vaulted ceilings in half of the house.A dealer wants to set me up with a 4 ton furnace w/variable speed 4 ton coil and a 3 ton compressor wouldnt a 4ton compressor be the better way to go?

  2. #2
    Join Date
    Aug 2003
    Fort Worth, TX
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    Neither is better if there's no data to back it up. Without a heat gain/heat loss calculation performed, your dealer is just guessing. Find someone who understands the Manual J process.
    Building Physics Rule #1: Hot flows to cold.

    Building Physics Rule #2:
    Higher air pressure moves toward lower air pressure

    Building Physics Rule #3:
    Higher moisture concentration moves toward lower moisture concentration.

  3. #3
    Join Date
    Jan 2004
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    Some brands require the 4 ton indoor coil, to get the rated SEER of the 3 ton outdoor unit.
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    How many times must one fix something before it is fixed?

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