Published at Saturday, September 15th, 2018 - 21:45:41 PM. Fireplace. By Catarina Borngen.
Ventless gas logs are designed to be used indoors and have several safety features that make them safe inside your home. Manufacturers of ventless gas logs have a limit to the amount of BTU’s burned which limits the size of most unvented gas log burners to 30". The size of a firebox that would comfortably hold a 30" gas burner is 42" to 48" which is still a large fireplace. A standing pilot assembly stays lit and heat is tracked with a thermocouple. If the flames go out for any reason, the thermocouple cools and gas stops at the valve. Oxygen depletion sensors are also attached to the gas valve to ensure the flames do not burn up so much oxygen in the house that unsafe conditions are created.
I have been in this situation many times and the answer is often gas logs. I have had clients with damage to their chimney flue inside a wall and believe they can put a gas log fireplace kit into their wood-burning fireplace instead of repairing the damaged flue. This is a mistake, and a dangerous mistake. Gas logs use liquid propane or natural gas instead of wood for fuel. When gas burns, oxygen is burned and carbon monoxide is created. If there is damage to the flue, a typical gas log fireplace is not the answer because the fresh air ventilation is still necessary to pull out carbon monoxide. The answer is ventless gas logs. Vent free gas logs do not have to be vented. When a client wants to design a custom outdoor fireplace but they do not want to build a chimney and cut through their patio roof, a vented gas log kit is the perfect solution because no ventilation is necessary.
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