What exactly are “vent-free” gas products?
Vent-free gas products are gas appliances that are designed to be installed and operated without the addition of a vent or chimney. They are intended to provide supplemental heat to a home. Because there is no vent, flue, or chimney required, all of the heat generated by the product goes directly into the home. That’s why vent-free products are 99 percent energy efficient. 2. What types of vent-free gas products are available? Vent-free gas appliances are available as gas space heaters, gas logs, gas stoves, gas fireplaces, and gas fireplace inserts. They operate on natural or propane gas. 3. Can I use vent-free logs in any wood-burning fireplace—masonry or prefab? Vent-free logs are certified for installation in the following enclosures: o A masonry fireplace with a suitable chimney; o A listed factory-built fireplace, assembled with a working chimney, in accordance with the terms of the listing, and not including a marking prohibiting use with unvented gas logs; o A vent-free fireb
