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How to Fix Cold Air Coming From Gas Fireplace

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By tumfweko1 on February 22, 2023.

When it comes to heating our homes, gas fireplaces have become a popular and convenient option for many homeowners. While they offer a lot of benefits, such as easy control over the flame and low maintenance requirements, one issue that some people may experience is feeling cold air coming from the fireplace.

 This can be particularly frustrating, especially when you’re trying to stay cozy on a chilly night. In this blog post, we’ll explore the potential causes of cold air coming from a gas fireplace and offer some solutions to help you stay warm and comfortable. Whether you’re dealing with a drafty fireplace or looking to improve your home’s energy efficiency, we hope you’ll find these tips helpful.

Causes of Cold Air Coming from Gas Fireplace

There are several potential causes of cold air coming from a gas fireplace. Below are some of the most common reasons why you might be feeling a chill:

Cold outside air: If the fireplace isn’t in use and the damper or flue is left open, cold outside air can easily flow into the room through the fireplace. This can make the room feel drafty and uncomfortable.

Poorly sealed damper or flue: Even when the fireplace is not in use, air can enter the room through a poorly sealed damper or flue. This can happen if the seals have worn down or if the damper is not fully closed.

Chimney drafts: A chimney can create a draft that pulls cold air into the room. This happens when the warm air inside the house rises and escapes through the chimney, creating negative air pressure that sucks cold air in from outside.

Negative air pressure: In some cases, negative air pressure inside the house can cause cold air to be pulled in through the fireplace. This can happen when there isn’t enough air circulating in the house, leading to a vacuum effect that draws in air from wherever it can find it.

Solutions to the Problem

There are several steps you can take to address cold air coming from your gas fireplace. The best solution will depend on the underlying cause of the problem. Below are some common fixes that may help:

Close the damper or flue: If cold air is coming in through the fireplace when it’s not in use, make sure the damper or flue is fully closed. This will prevent cold air from entering the room.

Use a fireplace cover: Another simple solution is to cover the fireplace when it’s not in use. This can be a decorative cover or a simple sheet of plastic or fabric. The cover will help prevent cold air from entering the room and can also help keep the fireplace clean.

Install a top-sealing damper: A top-sealing damper is installed at the top of the chimney and can be closed when the fireplace is not in use. This can be a more effective solution than a traditional damper, as it prevents cold air from entering the chimney in the first place.

Use a chimney balloon: A chimney balloon is a balloon-like device that can be inflated to block the chimney and prevent cold air from coming into the room. It’s important to make sure the balloon is properly installed and removed before using the fireplace.

Install a glass fireplace door: A glass fireplace door can help prevent cold air from entering the room and also increase the efficiency of the fireplace. The glass will act as an additional barrier, keeping the warm air in and the cold air out.

Install a vented gas log set: If you’re looking for a more efficient source of heat, a vented gas log set can be a good option. These are designed to look like traditional wood logs and are connected to a gas line. They provide heat without the need for a chimney or flue.

 Additional Tips for Improving Your Home’s Warmth and Energy Efficiency

While addressing the issues with your gas fireplace can certainly help improve your home’s warmth, there are other steps you can take to increase your home’s energy efficiency and reduce the amount of cold air entering your home. Below are some additional tips to consider:

Insulate your home: One of the best ways to keep your home warm and reduce energy bills is to ensure your home is properly insulated. This can include insulating walls, floors, and attics, as well as sealing any gaps around windows and doors.

Use draft stoppers: Draft stoppers can be placed under doors or windows to prevent cold air from entering the home. These can be purchased at most home improvement stores or easily made with simple materials.

Add weatherstripping: Weatherstripping can be added around doors and windows to help create a tight seal and prevent drafts. This can be an easy and affordable solution for improving your home’s energy efficiency.

Seal air leaks: Use caulking or expanding foam to seal any gaps or cracks in the walls or foundation that allow cold air to enter your home.

Upgrade your thermostat: Consider upgrading to a programmable thermostat, which can help you save energy and money by adjusting the temperature automatically when you’re not at home.


Experiencing cold air coming from a gas fireplace can be frustrating, but it’s important to remember that there are several potential causes and solutions. By taking steps to address the underlying issue and improve your home’s energy efficiency, you can create a more comfortable and cost-effective living space. If you’re unsure about the cause of the issue or need help with troubleshooting, it’s always a good idea to consult a professional. With the right tools and knowledge, you can stay warm and cozy all winter long.