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  2. Fireplace - Wikipedia

    en.wikipedia.org/wiki/Fireplace

    Ventless fireplaces (duct free/room-venting fireplaces) are fueled by either gel, liquid propane, bottled gas or natural gas. [clarification needed] In the United States, some states and local counties have laws restricting these types of fireplaces. They must be properly sized to the area to be heated. [5]

  3. Direct vent fireplace - Wikipedia

    en.wikipedia.org/wiki/Direct_vent_fireplace

    A direct vent fireplace is a prefabricated metal fireplace that employs a direct-vent combustion system. "Direct vent" refers to a sealed-combustion system in which air for combustion is drawn from the outdoors, and waste combustion gasses are exhausted to the outdoors. "Direct vent" does not simply mean that all gasses from combustion are ...

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

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

    Nothing warms up a room like a gas fireplace and stately mantle. These are your best options for a worthwhile investment. Skip to main content. 24/7 Help. For premium support please call: 800-290 ...

  5. Gas heater - Wikipedia

    en.wikipedia.org/wiki/Gas_heater

    Another example of a non-flued gas heater, running on natural gas. Non-flued heaters – also known as unvented heaters, vent-free heaters, or flueless fires, may be either permanently installed or portable, and sometimes incorporate a catalytic converter. [1] Non-flued heaters can be risky if appropriate safety procedures are not followed.

  6. Flue - Wikipedia

    en.wikipedia.org/wiki/Flue

    Fireplaces are one of the biggest energy wasters when the flue is not used properly. This occurs when the flue is left open too wide after the fire is started. Known as convection, warm air from the house is pulled up the chimney, while cold air from outside is pulled into the house wherever it can enter, including around leaking windows and ...

  7. Chimney - Wikipedia

    en.wikipedia.org/wiki/Chimney

    Today's central heating systems have made chimney placement less critical, and the use of non-structural gas vent pipe allows a flue gas conduit to be installed around obstructions and through walls. Chimney in North London Flue. Most modern high-efficiency heating appliances do not require a chimney.

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