Which type of fireplace is known for being duct-free?

A ventless fireplace is specifically designed to operate without the need for a flue or duct system. This type of fireplace allows for the combustion gases and byproducts to be re-circulated back into the room, increasing its efficiency and making installation simpler, as it can be placed in locations where traditional venting would be impractical or impossible.

Ventless fireplaces are equipped with oxygen depletion sensors that monitor the air quality in the room and shut off the gas supply if the oxygen levels drop too low. This is a key safety feature, ensuring that indoor air quality remains safe for occupants. The lack of ducting also allows for flexible installation options and can be an attractive choice for those looking to add a fireplace to a space without substantial remodeling.

In contrast, direct vent fireplaces, wood-burning fireplaces, and gas log fireplaces all necessitate some form of venting system to expel combustion gases outside or utilize existing chimneys. These types of fireplaces serve different purposes and operate under different principles related to airflow and venting.