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Thread: HVAC Capacity

  1. #1
    Join Date
    Mar 2013
    Location
    Virginia
    Posts
    4

    Default HVAC Capacity

    We have 2 zone HVAC from Goodman. One unit is in the Attic, it's capacity is 39,000BTU (contractor mentioned). Builder said that this is enough when we finish attic room which is approx. 400 sq.ft. We hired local contractor and finished the attic but it is not conditioning the attic well. We do not see enough air coming out. Can you please tell me what might be the reason? Is the capacity not enough?

  2. #2
    Join Date
    Jul 2010
    Location
    SoCal
    Posts
    5,438

    Default Re: HVAC Capacity

    What's the tonnage?

  3. #3
    Join Date
    Mar 2013
    Location
    Virginia
    Posts
    4

    Default Re: HVAC Capacity

    How to find out the tonnage? Will it be in the unit somewhere?

  4. #4
    Join Date
    Jul 2010
    Location
    SoCal
    Posts
    5,438

    Default Re: HVAC Capacity

    The tonnage info is built into the model number. To decode, call the manufacturer's customer's service.

    The tonnage and the BTU must match. I recommend calling a tech.

  5. #5
    Join Date
    Dec 2007
    Location
    Tennessee
    Posts
    1,419

    Default Re: HVAC Capacity

    12,000 BTU=1 ton. 39,000 BTU= 3.25 tons

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