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2. Fireplace insert - Wikipedia

   en.wikipedia.org/wiki/Fireplace_insert

   This custom-fitted fireplace insert has large glass doors to maximize the view of the fireplace, and a large surface area heat exchange with thermostat-controlled fan-forced air. A fireplace insert [1] is a device that can be inserted into an existing masonry or prefabricated wood fireplace. Fireplace inserts can be fuelled by gas, wood ...

3. Fireplace - Wikipedia

   en.wikipedia.org/wiki/Fireplace

   During the first phase the initial heat is provided through a large glass window while the fire is burning. During this time the structure, built of refractory bricks, absorbs the heat. This heat is then evenly radiated for many hours during the second phase. Masonry fireplaces without a glass fire window only provide heat radiated from its ...

4. 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.

5. Register (air and heating) - Wikipedia

   en.wikipedia.org/wiki/Register_(air_and_heating)

   However, the hot air must be pushed from the register with enough force (or "throw") so that it will cross the room and reach the window. If there is too little throw, the hot air will stop moving partway across the room, the cold air from the window will not be heated (creating the feeling of a cool draft), and air circulation will suffer. [9]

6. Is your heater making you sick? How to avoid cold-like ...

   www.aol.com/lifestyle/heater-making-sick-avoid...

   Humidifiers can add moisture back into dry air caused by heaters. Lizarzaburu recommends them, especially if you or your family members have a history of allergies or asthma. However, make sure to ...

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