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  1. #27
    Join Date
    May 2004
    Location
    south louisiana
    Posts
    3,188
    Quote Originally Posted by jimj View Post
    and if ductwork was sealed so bird couldn't have gotten in there...why would
    duct cleaning be needed.
    properly installing & sealing of ductwork, plenum connections, return air
    leaves no areas for debris to get into ducts.
    thus no need for duct cleaning.
    The cure of the part should not be attempted without the cure of the whole. ~Plato

  2. #28
    Join Date
    Dec 2002
    Location
    Arizona
    Posts
    4,412
    Quote Originally Posted by energy_rater_La View Post
    and if ductwork was sealed so bird couldn't have gotten in there...why would
    duct cleaning be needed.
    properly installing & sealing of ductwork, plenum connections, return air
    leaves no areas for debris to get into ducts.
    thus no need for duct cleaning.
    All very true! I know you do a lot of duct sealing after the fact, so what do you do with all that dirt that is now going to come out of the newly sealed ducting with higher velocities and volume?

    Just asking?
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  3. #29
    Join Date
    May 2004
    Location
    south louisiana
    Posts
    3,188
    I take things apart. as the parts come apart I inspect the insides.
    if the flex is moldy, or dirty..it gets replaced.

    if the ductwork is hard pipe I'm inspecting it prior to sealing.
    around here lots of hard pipe is held together with just duct tape, which you don't discover
    until you unwrap it. (usually duct wrap is shot..one of the reasons for sealing is to re-insulate)
    with just duct tape holding it together, it constantly comes apart, so as I screw sections back together
    I look inside. I've had to take sections out and hose them out, let them dry & then put them back
    together.

    hvac company takes static pressure readings before & after to show any changes.
    it was actually this forum that made me aware that I needed to be careful with sealing ducts
    & the effect it could have on static pressure.

    for a while the guy I usually work these jobs with would take sp readings, but a couple of
    hvac companies didn't like that...so now the hvac co takes readings both before & after.
    fine with me...having extra eyes on my jobs is a good thing IMO.

    what still amazes me is the amount of dirt, spiderwebs, sheetrock dust & crap in
    return air chases. homeowners are amazed...but never thought before to vac out
    return. once the chase is air sealed & lined with ductboard which is then mastic
    sealed..returns don't get dirty again. I've seen return used to store all kinds
    of stuff..paint cans, cleaning products & a few things stashed away from
    parents by their kids.

    I've done a few duct change outs of flex duct after duct cleaning. not sure what
    they used..whips brushes lions tigers or bears...but the flex liners were shot.
    The cure of the part should not be attempted without the cure of the whole. ~Plato

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