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Your chimney comes with dampers, which are similar to air vents. Dampers are metal plates that allow hot air and smoke to flow from the fireplace up your chimney and out of your home. When you close the damper, it prevents cool air from getting into your home. This is why you’ll want to check to make sure your damper is open before starting your fireplace and you want to ensure it’s closed after the fire goes out. You can open and close them via an external knob, pull chain, or lever. 

You should schedule a fireplace inspection at least once a year, per the National Fire Protection Association (NFPA). However, this is the minimum requirement even if you’re diligent with fireplace maintenance between uses. If you suspect your fireplace is malfunctioning, schedule one sooner to avoid fire hazards or the release of harmful emissions like carbon monoxide in your home.

Pellet stoves are designed to run for several hours at a time. Running them for an entire day is not uncommon. More advanced models can run continuously for up to 48 hours, making them ideal if you live in extremely cold conditions and don't want to keep refueling the stove.

Signs that your chimney may need to be replaced include visible damage like cracks in the structure, bricks, or mortar, as well as crumbling or flaking mortar and loose bricks. Leaks, dampness, discoloration, and efflorescence (a white, stain-like substance on the bricks) are also key indicators of water damage, which can compromise the chimney's safety. Addressing these problems is essential, as a chimney in this condition may be at risk of collapsing and causing major damage to your home. A full replacement costs about $10,000 on average, but can range from $3,100 to $15,400.