How Prevent Cold Air Comming From Your Fireplace
8045 Snouffer School Rd. Gaithersburg MD 20879

Why Is Cold Air Coming from My Fireplace?

The question about cold air coming from the fireplace is a question many homeowners have. Fortunately, there are only a few possible causes and several very effective remedies.

chimney cap installFireplace and chimney basics

The basic structure and operation of a fireplace and chimney is something most homeowners readily understand. There’s a firebox, where fires burn, and a chimney, up which go smoke and combustion gasses. The path for smoke also is a path for air. When a fireplace isn’t in use, cold air from outside can come down the chimney into the home, and warm interior air can escape up through the flue.

Ways to prevent cold air entering your home through your fireplace

Keeping your home warmer in the winter can involve a couple steps. Step one is stopping the cold-air draft.

Fireplace damper:

The damper that sits above the firebox should be able to close fully and make a tight seal. 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. If you suspect this may be a problem, have your damper inspected by a certified fireplace/chimney inspector.

Chimney plug:

Also known as a chimney balloon, this product fits up in the chimney and is inflated, creating a solid barrier against incoming air. Chimney plugs can be used any time you’re not burning a fire as an extra layer of protection. If you forget about the plug and light a fire, it will deflate on its own to allow smoke to exit up the chimney.

Fireplace doors:

Another way to keep cold air out of your room is to install a set of fireplace doors. Quality fireplace doors will create a strong seal at the mouth of the firebox and prevent air circulation when you’re not using your fireplace. Not only will doors keep your home warmer, they look fantastic, too.

gas chimney

Consider an upgrade with a fireplace insert or ZC fireplace

If you’re using a traditional open masonry fireplace, drafts of cold air are something you’re going to have to deal with, like it or not. However, you can completely eliminate these drafts by adding a powerful new fireplace insert to your existing firebox.

Inserts are built in a factory and run on wood, gas or pellets. They work on a closed-combustion system that produces and retains much larger amounts of heat than a masonry fireplace. They have their own vent pipe, which goes right up the chimney.

Zero-clearance, or ZC fireplaces, also are factory built, but unlike inserts, they’re installed into a new area in a wall within your home. These appliances are powerful heat producers and never allow the cold-air drafts that keep your home chilly.

Wood, gas and pellet ZC fireplaces, like inserts, have heat-efficiency ratings of 80% and higher. Compare that to ratings of 10% or 20% common with traditional masonry fireplaces. This means the majority of the heat the unit produces will be available as heat for the home.

As you can see, cold air entering your home through your fireplace is a problem that can be addressed. High’s Chimney Service of Gaithersburg, MD, can help with inspections, repair and the installation of components, fireplace inserts and ZC fireplaces. Get on the road to more warmth by calling us today at (301) 519-3500.