Crawl Space HVAC

Discussion in 'HVAC Heating & Cooling' started by weather777, Nov 3, 2008.

  1. weather777

    weather777 New Member

    Messages:
    36
    HVAC was located in the crawl space of new construction(see below),but there is concern as to noise potential at night with a bedroom above.Please provide thoughts as to noise as well as possible solutions---there is a mechanical room on floor above,but HVAC person did not want to use it.The crawl space will be sealed (and conditioned) with foam above and other materials on walls and floor.

    Thank you for your help

    Attached Files:

  2. nhmaster

    nhmaster Master Plumber

    Messages:
    3,189
    Location:
    S. Maine
    Rule 1 - Never locate mechanical equipment near the master bedroom.
  3. Redwood

    Redwood Master Plumber

    Messages:
    7,452
    Location:
    Connecticut
    Unless your house is located next to a busy interstate highway or, rail line...
    Then it probably doesn't matter...
  4. Southern Man

    Southern Man DIY Hillbilly

    Messages:
    530
    Location:
    North Carolina
    Imagine that, the HVAC professional took it upon himself to usurp the house designer. Call him back and tell him to do the job right or you'll call your attorney.
  5. weather777

    weather777 New Member

    Messages:
    36
    We agreed to it after hearing it would not work in the mechanical room as thought ---so I blame myself for it.:(
  6. Southern Man

    Southern Man DIY Hillbilly

    Messages:
    530
    Location:
    North Carolina
    Most of the noise will come from the unit being attached to the I-joists. If you support it on the ground that will all go away.

    Get out the install manual for the thing and locate the lower support points. Then get yourself a dozen or so concrete blocks, some pressure treated lumber, a short shovel and your old clothes. Dig a footing under the unit to the frost line and stack up the blocks to a few inches of the unit's support points. Cut plates from the lumber to bridge over the masonry cells and cushion the unit. Then drop the unit down onto the new support, making sure that you've got plenty of slack in the flexible duct connections and the condensate still drains.

    You can also get a roll of unfaced fiberglass insulation and add it to what you already have between the joists above the unit.
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