Cold Air Coming In From Direct Vent Gas Fireplace

In the winter alberta we get huge drafts coming in the grills of our gas fireplace insert.

Cold air coming in from direct vent gas fireplace.

The dog house is vinyl siding and there is an 8 inch vent out the back of it. A direct vent gas inserts is flued up the chimney but because it is a sealed firebox the cold air cannot escape back into the room. I have a marco clean face insulated model d41cfi fireplace built on. This should stop the problem.

From the outside there is a fresh air intake on the chimney and there is a metal chimney exiting the top of the old stucco chimney. I am going to make the assumption that the builder put no. I have a superior dvt8 cens direct vent gas fireplace. Unfortunately i didn t figure out how to set the glass cover back correctly and we had to endure a couple weeks of sub zero temperatures to 5ft around the fireplace until the builder showed me what had gone wrong.

I am getting a cold draft from the bottom vent top of unit where fireplace meets mantle and even surrounding area where floor meets mantle. Use our direct vent fireplace termination cap coveron the outside cap to stop the cold outside air from coming in through the flue. Cold air issues from the bottom of direct vent fireplace can usually be eliminated by checking underneath. This unit is five years old and installed when home was built.

I ve noticed it when it s not in use especially at night but it seems inconsistent and not necessarily predictable by the temperature or audible wind. Plug the holes with rokwool insulation or high temp caulk. Install our magnetic fireplace vent coveron the lower vent to stop the inner air circulation from coming inside. Where the controls are located there are usually gas line knockouts holes on the left and right side.

Did this with the fireplace direct vent gas too. I suspect that your vent outside is not lower than the fire place which would allow colder heavier air to find it s way into the house.