Cold Air Coming Through My Gas Fireplace

The air comes in through the large unsealed hole that is left from the pipe going through.

Cold air coming through my gas fireplace.

Putting a bag or plastic over the box outside does nothing. If the wall behind the fireplace is uninsulated which is common the problem will be worse. Step one is stopping the cold air draft. The damper that sits above the firebox should be able to close fully and make a tight seal.

Stuffing the hole s with batt insulation will slow the draft down. When you close the flue you re essentially plugging the chimney with a metal flap. This air is direct to the surrounding area behind the fireplace and comes out through any vent usually the lower grill making the floor icey cold. It seems that the gas insert s enclosure bottom must sit off of the bottom of the fireplace opening by about an inch.

Keeping your home warmer in the winter can involve a couple steps. Install or replace the damper a damper is a metal flap in your chimney that blocks cold air from coming in and warm air from escaping. Use our magnetic fireplace vent cover to stop the inner cold air circulation from the vents. I m guessing that that along with a void between the back of the insert and the flue is allowing cold air to come down the chimney past the back of the insert and underneath the insert and out into my family room.

Remembering to keep the damper closed when the fireplace isn t being used will block the cold air that wants to enter your home. Over years of use dampers can become rusted or warped. You will stop the cold drafty air in the winter and keep warm humid air from coming in during the summer months. Leaving the fireplace pilot light on in the winter will help.

Ways to prevent cold air entering your home through your fireplace. How can i fix this.