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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. Gas heater - Wikipedia

    en.wikipedia.org/wiki/Gas_heater

    Upright non-flued liquefied petroleum gas heater, 1970s A wall mounted gas heater that runs on either propane or natural gas. A gas heater is a space heater used to heat a room or outdoor area by burning natural gas, liquefied petroleum gas, propane, or butane. Indoor household gas heaters can be broadly categorized in one of two ways: flued or ...

  4. The 11 Best Gas Patio Heaters for Outdoor Entertaining - AOL

    www.aol.com/9-best-gas-patio-heaters-191700923.html

    50,000 BTU Patio Heater. East Oak’s propane-powered patio heater offers 50,000 BTUs—one of the most powerful heat outputs in this roundup—with a generous heating radius that will accommodate ...

  5. Grate heater - Wikipedia

    en.wikipedia.org/wiki/Grate_heater

    The ideal tubular grate heater would be built like an ideal heat exchanger with as large a surface area as possible with material suitable to minimize the heaters thermal deterioration yet provide good thermal conductivity with a high airflow rate, similar to your home furnace. However the unique environment of a fireplace and the burning of ...

  6. Fireplace - Wikipedia

    en.wikipedia.org/wiki/Fireplace

    Some fireplace units incorporate a blower, which transfers more of the fireplace's heat to the air via convection, resulting in a more evenly heated space and a lower heating load. Fireplace efficiency can also be increased with the use of a fireback, a piece of metal that sits behind the fire and reflects heat back into the room.

  7. Central heating - Wikipedia

    en.wikipedia.org/wiki/Central_heating

    Sealed systems offer an alternative to open-vent systems, in which steam can escape from the system, and gets replaced from the building's water supply via a feed and central storage system. Heating systems in the United Kingdom and in other parts of Europe commonly combine the needs of space heating with domestic hot-water heating.