Dvid
Member
We have a new home and one bathroom fan in particular has horrible cold backdraft from outside.
The damper with the fan is angled at the top and bottom. It's not stuck. I suspect it is leaking in air or worse blowing open from the other side if enough air is hitting the flap. That particular corner of the house gets a lot of wind. The soffitt cover is not snug up against the soffitt. Even covering 3 of the four sides of the vent cover with tape doesn't eliminate the problem.
I removed the outside soffitt vent cover and there is a white plastic pipe attached to the flex duct. (See photo. I have temporarily closed the pipe.)
I thought about inserting a product like Continental Fan Manufacturing BDD100 Spring Loaded Backdraft Damper for 4" Ducting BUT the white plastic piece in the soffitt has a little lip to hold a screen guard and is less than 4" wide. Not sure it will work.
Home Depot makes a 1 way soffit vent, but it must go beneath the soffitt and it won't attach to the white plastic tube under the soffit. Both pieces are 4".
Is my only choice to get up in the attic and install something like a Fantech 9800000 RSK-4 within the flex duct line?
Thanks! I need expert help.
The damper with the fan is angled at the top and bottom. It's not stuck. I suspect it is leaking in air or worse blowing open from the other side if enough air is hitting the flap. That particular corner of the house gets a lot of wind. The soffitt cover is not snug up against the soffitt. Even covering 3 of the four sides of the vent cover with tape doesn't eliminate the problem.
I removed the outside soffitt vent cover and there is a white plastic pipe attached to the flex duct. (See photo. I have temporarily closed the pipe.)
I thought about inserting a product like Continental Fan Manufacturing BDD100 Spring Loaded Backdraft Damper for 4" Ducting BUT the white plastic piece in the soffitt has a little lip to hold a screen guard and is less than 4" wide. Not sure it will work.
Home Depot makes a 1 way soffit vent, but it must go beneath the soffitt and it won't attach to the white plastic tube under the soffit. Both pieces are 4".
Is my only choice to get up in the attic and install something like a Fantech 9800000 RSK-4 within the flex duct line?
Thanks! I need expert help.