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The short answer is yes, but the longer answer is more complex. Unless the fireplace is ventless by design, you’ll need some type of exhaust pipe system to safely send fumes and other harmful byproducts out of the house. Even then, ventless fireplaces are not always permitted because they do keep the byproducts inside of your house. Ventless fireplaces are safest when installed in spaces that are themselves well-ventilated, like large rooms with lots of windows.

The NFPA model codes and International Residential Code (IRC) mandate that all new one- and two-family homes have fire sprinkler systems. However, all municipalities are different. The best way to determine if your municipality requires fire sprinklers is to contact your state fire marshal’s office. One reason to install a fire sprinkler system is that it’s the first line of defense in putting out a fire and alerting your family of emergencies.

The primary disadvantage of a ventless fireplace is that it doesn’t have an exterior venting system. This means that the byproducts from combustion are emitted into your home, which raises some safety concerns. In addition, ventless gas fireplaces produce moisture as they burn—and if there’s no ventilation, you could end up with a mold problem.

After a house fire, you should not reenter your home unless the fire crew has told you it’s safe to do so. In the longer term, you should not attempt to make repairs to the house on your own. Professional crews are trained to clean up after a fire (including smoke and soot damage), dry out any water damage from the firefighter crews, and make the necessary structural, plumbing, and electrical repairs—and this is all likely covered by insurance.