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Thread: Manual J

  1. #1
    Join Date
    Nov 2005
    Location
    Kansas City (zip 66204)
    Posts
    50

    If I ask my HVAC contractor to do a manual J test what should I expect? How long should it take? If I am in the house when he does it what should I expect to see?

    Also, is this something that I should expect to be included in a free estimate or do I pay for it? If I do pay for it should I get some kind of report that I could use in the future?

    Thanks,
    Doug

  2. #2
    Join Date
    Feb 2003
    Location
    Huntsville,AL
    Posts
    4,125
    if you use the program from this site, then YOU will know where your losses | gains are & those values. but, you have to measure & enter the data -- probably take 4- 6 hours -- measuring the exterior openings, room size, checking the type & thickness of existing insulation, noting the type of windows & doors, wall construction.

    then you can shop --
    the contractors can then spot check the data, then apply their judgment as to equipment selection, suggest needed upgrades or corrections to equipment, including ducts.

    read lots here & at BUILDINGSCIENCE.com

    how do you expect them to pay for 0.5- 1 day of work? would you work for free? do you want 3+ contractors to each do this?

    as a minimum, measure --
    let the contractor spend time inspecting your existing ducts & equipment.

    it would be helpful to have last 2y of fuel use --

    it would be helpful to list any comfort problems -

    [Edited by cem-bsee on 11-30-2005 at 08:43 AM]
    harvest rainwater,make SHADE,R75/50/30= roof/wall/floor, use HVAC mastic,caulk all wall seams!

  3. #3
    Join Date
    Nov 2005
    Location
    Kansas City (zip 66204)
    Posts
    50

    Where is that program that was mentioned in the last post? I can do the leg work and get the numbers. Actually, I would perfer to do it my self.



    BTW - I would not expect that someone give me 1/2 days work for free.

    Doug

  4. #4
    Join Date
    Nov 2005
    Location
    On Tour or Central FL or Michigan
    Posts
    49
    HVAC-Calc last tab at top of page

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