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 ...

Natural-vent fireplaces can also pull off classical elegance, such as this Keystone Deluxe model from Empire, or a more modern look, like the customizable B46 Ascent model from Napoleon. A direct ...