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2. 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. [5]

3. 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.

4. Fireplace - Wikipedia

   en.wikipedia.org/wiki/Fireplace

   There are also air quality control issues due to the amount of moisture they release into the room air, and an oxygen sensor and a carbon monoxide detector are safety essentials. 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 ...

5. Propane - Wikipedia

   en.wikipedia.org/wiki/Propane

   The enthalpy of combustion of propane gas where products do not return to standard state, for example where the hot gases including water vapor exit a chimney, (known as lower heating value) is −2043.455 kJ/mol. [29] The lower heat value is the amount of heat available from burning the substance where the combustion products are vented to the ...

6. Central heating - Wikipedia

   en.wikipedia.org/wiki/Central_heating

   Some central heating plants can switch fuels for reasons of economy and convenience; for example, a home owner may install a wood-fired furnace with electrical backup for occasional unattended operation. Solid fuels such as wood, peat or coal can be stockpiled at the point of use, but are inconvenient to handle and difficult to automatically ...

7. AOL Mail

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