To conserve energy and reduce heating costs, many of us have turned to wood burning fireplaces and stoves to supplement the heat we receive from our natural gas furnaces.
However, some homes often are too tight to provide adequate air for the safe operation of open-flame heating systems (fireplaces, wood, oil, propane stoves, natural gas furnaces).
After you weatherize your home, you may need to add a combustion air source to prevent backdrafting. Consult with a qualified heating contractor.
What is back drafting?
To check for back drafting
However, if the vent is cold, your fireplace may be creating a dangerous back draft.
Turn down the thermostat and water heater controls. Let the fireplace burn down (if you have glass doors on the fireplace, close them), and call a heating contractor.