Traditional gas fireplaces, like their wood-burning cousins, require an exhaust flue (vent) to remove harmful fumes from the home. When possible, an existing chimney is used to run a new flue ...

Gas fireplaces, including inserts, can be direct-vent or ventless. Direct-vent systems are usually more expensive and less energy-efficient since heat escapes up the chimney. Unvented or vent-free ...