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  1. #14
    So it sounds like I have two ways to get this done. Aeroseal, if I can find someone to drive in for a price I can afford. Or brush on mastic, which means I have to pay someone to strip off the insulation along the ductwork, paint 'em shut, and then reapply the insulation. Eesh - this is going to cost me. Are there any other options I need to know about? Worth it in the end, I suppose. Thanks for all the valuable responses.

  2. #15
    Join Date
    Aug 2002
    Location
    Office and warehouse in both Crystal River & New Port Richey ,FL
    Posts
    18,836
    It really is worth it.

    Every cubic foot of air that leaks from the supply ,into the crawl,causes one to infiltrate your home.

    Every cubic foot of return air leak ,in the crawl,pulls in one .

  3. #16
    Join Date
    Aug 2003
    Location
    Central Kentucky
    Posts
    6,248
    Before you invest the time & money in sealing that existing duct system you might want to contact a contractor who can determine if those ducts are operating properly in the first place.

    Sealing a pre-existing duct system that is undersized & inadequate will give you more trouble than you might suspect.

    The airflow delivery & static pressure of the duct system should be verified before any sealing is done.

    Check out http://www.nationalcomfortinstitute.com for more information that might be of help.
    Have you set up a Google alert for Carbon Monoxide yet?
    Click here to find out how.

  4. #17
    Join Date
    Aug 2002
    Location
    Office and warehouse in both Crystal River & New Port Richey ,FL
    Posts
    18,836
    Originally posted by davidr
    Before you invest the time & money in sealing that existing duct system you might want to contact a contractor who can determine if those ducts are operating properly in the first place.

    Sealing a pre-existing duct system that is undersized & inadequate will give you more trouble than you might suspect.

    The airflow delivery & static pressure of the duct system should be verified before any sealing is done.

    Check out http://www.nationalcomfortinstitute.com for more information that might be of help.

    Very good point.We always check ESP first,as well as room by room cfms.

  5. #18
    Join Date
    Feb 2003
    Location
    Huntsville,AL
    Posts
    4,125
    check & use the basics=
    are your rooms balanced now? -- within 3F just after the blower shuts down -- winter & summer?
    are all comfortable?

    if not= load calc + duct sizing for ea room
    duct rework = return & supply
    duct sealing & insulating

    good time to upgrade your filters to 5" thick media type
    harvest rainwater,make SHADE,R75/50/30= roof/wall/floor, use HVAC mastic,caulk all wall seams!

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