Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.

Flue damper

Options
Paul_28
Paul_28 Member Posts: 113
I have the Buderus G124X/25 boiler installed and connected to a stainless steel chimney liner which is insulated. In the morning the flue pipe is cold to the touch and when the boiler fires there is spillage form the boiler hood. It takes a few boiler cycles for the flue to become warm enough for a good draft I thought I would remove the flue damper and replace it with strait pipe to keep the chimney warmer. Do you think it will help?

Comments

  • Steamhead
    Steamhead Member Posts: 17,008
    Options
    Are you sure

    something isn't partially blocking the liner? Bird or wasp nests can do that......

    To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"
    All Steamed Up, Inc.
    Towson, MD, USA
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
    Consulting
  • Paul_28
    Paul_28 Member Posts: 113
    Options
    The liner

    is clear. its a new install. When the flue pipe warms up the daft is good for the rest of the day. It only happens in the morning when the boiler is of for most of the night. The outside tempuature here is about 50*.
  • Dale
    Dale Member Posts: 1,317
    Options
    Connector rise?

    Is the pipe up from the vent damper as straight and long as possible before it goes into the chimney? A longer connector rise really makes a difference. Is the vent connector B vent double wall or single wall, double wall heats much quicker. Is there a listed cap on the chimney liner? It is not unusual for a flue to spill for a short time but since it's only 50 out it shouldn't spill for long.
  • Paul_28
    Paul_28 Member Posts: 113
    Options
    Problem solved

    Problem solved. There was a small amount of cold air from somewhere in the old chimney blowing on the connector pipe in the chimney thimble. I corrected this by putting ceramic insulation around the connector pipe. The chimney thimble is 7” and the connector pipe 5”. No more spillage and the flue pipe are warm. Thanks
  • Dale
    Dale Member Posts: 1,317
    Options
    Good job

    This is a good reason to be sure the annular space between the top of the liner and top of the chimney is well sealed, and as you found the bottom also.
This discussion has been closed.