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2. Direct vent fireplace - Wikipedia

   en.wikipedia.org/wiki/Direct_vent_fireplace

   Direct vent fireplaces are extremely efficient compared to a traditional fireplace and can operate at about 85% efficiency. Even a very efficient traditional fireplace only operates at about 15% efficiency. This is because most of the hot air generated by the fire travels up the chimney due to convection.

3. Fireplace - Wikipedia

   en.wikipedia.org/wiki/Fireplace

   Direct vent fireplaces are fueled by either liquid propane or natural gas. They are completely sealed from the area that is heated, and vent all exhaust gasses to the exterior of the structure. Chimney and flue types: Masonry (brick or stone fireplaces and chimneys) with or without tile-lined flue. Reinforced concrete chimneys. Fundamental ...

4. Gas venting - Wikipedia

   en.wikipedia.org/wiki/Gas_venting

   Gas venting and flaring that are performed as routine practices are especially wasteful and may be eliminated in many modern industrial operations, where other low-cost options are available to utilize the gas. [3] Gas venting is not to be confused with similar types of gas release, such as those from:

5. Cozy Up at Home With These Gas Fireplaces—An Instant ... - AOL

   www.aol.com/lifestyle/cozy-home-gas-fireplaces...

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6. Innovative Hearth Products - Wikipedia

   en.wikipedia.org/wiki/Innovative_Hearth_Products

   Their product lines include gas, electric, and wood fireplaces for both indoor and outdoor settings. [4] They also produce additional products and accessories such as fireplace inserts , free-standing stoves , gas log sets, and venting products.

7. Stack effect - Wikipedia

   en.wikipedia.org/wiki/Stack_effect

   The stack effect or chimney effect is the movement of air into and out of buildings through unsealed openings, chimneys, flue-gas stacks, or other purposefully designed openings or containers, resulting from air buoyancy.