Direct Vent Fireplaces for Heat and Ambience Bob visits a Heat n' Glo showroom where Ross Morrison shows him a variety of direct-vent gas fireplaces. With a sealed glass chamber there is no interplay of of room air—no products of combustion will get into the room and it doesn't use any of the the room's already warm air for combustion. The fireplace inserts come with ceramic fiber logs. When the flames hit the logs they produce a nice glow. The logs are light, unbreakable, and last a lifetime. Ross shows Bob the 6000 TRXI, a premium model that is rated as a furnace. It has a beautiful masonry appearance inside and a pumps out enough BTUs to heat a 1200 - 1500 sq. ft. house. The fireplace also offers the option of turning the flames down or off or opening the climate control damper to cut the heat by one half.
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