Combustion air line

Discussion in 'HVAC' started by jeremymcl, Dec 20, 2019.

Help Support House Repair Talk by donating:

  1. Dec 20, 2019 #1

    jeremymcl

    jeremymcl

    jeremymcl

    Member

    Joined:
    Dec 19, 2019
    Messages:
    10
    Likes Received:
    0
    Location:
    Canada
    Hello,
    I have a 4” insulated combustion air line coming in beside my furnace. I know it’s need for air flow. My question is when nothing is running, there is still a breeze of air coming in. Is this normal? Or will hot water tank keep suction going?

    thank you
     
    Last edited: Dec 20, 2019
  2. Dec 20, 2019 #2

    kok328

    kok328

    kok328

    Well-Known Member

    Joined:
    Nov 20, 2007
    Messages:
    2,866
    Likes Received:
    284
    Should be that much of a breeze and hopefully they installed it to a few inches off the floor so that won't happen as bad.
    For mine, I installed and electronic damper on the end of the duct and tied that back to the transformer for the humidistat.
    With the humidifier set, when the furnace comes on the damper opens to allow for combustion air.
    When the furnace shuts off, the damper closes and prevents that cold air breeze.
     
  3. Dec 20, 2019 #3

    jeremymcl

    jeremymcl

    jeremymcl

    Member

    Joined:
    Dec 19, 2019
    Messages:
    10
    Likes Received:
    0
    Location:
    Canada
    Thank you for replying. It doesn’t make basement cold. Maybe it will always have a little breeze coming through. This is what I have.

    thanks again
     

    Attached Files:

Draft saved Draft deleted

Share This Page

Group Builder