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Fields SWG-III power venter

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Bill Nye_2
Bill Nye_2 Member Posts: 538
in THE MAIN WALL
combustion air, make sure you have make up air. If the house goes negative while the burner/power vent is cycling then on the off cycle cold air will enter the house through the power venter. This could cause condensation too.

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  • tom_49
    tom_49 Member Posts: 267


    Ive been seeing lots of power vented oil FHA furnaces vented with the Fields SWG-3 power venters .

    Alot of them have serious condensation issues in the flue pipe, judging by the white powderlike build-up at the pipe joints.

    Any solutions?

    Thanks Tom

  • Bill Nye_2
    Bill Nye_2 Member Posts: 538
    Post purge

    Make sure you have enough post purge timing. Make sure you are only pulling .03 - .04 draft in the breech. Make sure the burner is not underfired by too much.
  • tom_49
    tom_49 Member Posts: 267


    Thanks Bill, the house I was at tonight does have a comb. air problem. The dead giveaway was when the cellar door slammed shut after the blower ran for about 10 seconds.

    I left the cellar window open for the night. Told cust. we had to do some changes to duct system.

    I have to back tomm. to check a couple other things, I'll check out the post purge.What would say is a good PP cycle time? 3-5 min.
  • Bill Nye_2
    Bill Nye_2 Member Posts: 538
    Fan in a can

    I have been using Fields fan in a can lately with good success. 3-5 is good. I see a lot of them set to shut off ASAP. Guess they don't wanna waste heat.
This discussion has been closed.

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