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2. Grate heater - Wikipedia

   en.wikipedia.org/wiki/Grate_heater

   However the unique environment of a fireplace and the burning of gas, wood, coal, pellets, etc., require specific heater designs and material construction making few, if any, grate heaters compatible with all fuels. The most critical elements of any tubular grate heater are: Safety - construction material and method, design and features.

3. Grille (architecture) - Wikipedia

   en.wikipedia.org/wiki/Grille_(architecture)

   A wooden window grill in Plaza del Conde del Real, Valencia ().The structure was probably used as a stable. Grille, and control for an air duct. A grille or grill (French word from Latin craticula, small grill) is an opening of several slits side-by-side in a wall, metal sheet or another barrier, usually to allow air or water to enter and/or leave and prevent larger objects (such as animals ...

4. Register (air and heating) - Wikipedia

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

   A floor register. A register is a grille with moving parts, capable of being opened and closed and the air flow directed, which is part of a building's heating, ventilation, and air conditioning (HVAC) system.

5. Fireplace - Wikipedia

   en.wikipedia.org/wiki/Fireplace

   In 1678, Prince Rupert, nephew of Charles I, raised the grate of the fireplace, improving the airflow and venting system. The 18th century saw two important developments in the history of fireplaces. Benjamin Franklin developed a convection chamber for the fireplace that greatly improved the efficiency of fireplaces and wood-burning stoves.

6. Grating - Wikipedia

   en.wikipedia.org/wiki/Grating

   A grating is any regularly spaced collection of essentially identical, parallel, elongated elements.Gratings usually consist of a single set of elongated elements, but can consist of two sets, in which case the second set is usually perpendicular to the first (as illustrated). [1]

7. Grille (car) - Wikipedia

   en.wikipedia.org/wiki/Grille_(car)

   The front fascia of a motor vehicle has an important role in attracting buyers. [3] The principal function of the grille is to admit cooling air to the car's radiator. However, the look of the vehicle "matters a great deal more than whether the design features actually serve any fun