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2. Chimney - Wikipedia

   en.wikipedia.org/wiki/Chimney

   A flue liner is a secondary barrier in a chimney that protects the masonry from the acidic products of combustion, helps prevent flue gas from entering the house, and reduces the size of an oversized flue. Since the 1950s, building codes in many locations require newly built chimneys to have a flue liner.

3. Fireplace - Wikipedia

   en.wikipedia.org/wiki/Fireplace

   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 exterior of the structure. Chimney and flue types: Masonry (brick or stone fireplaces and chimneys) with or without tile-lined flue. Reinforced concrete chimneys. Fundamental ...

4. Ventilation (architecture) - Wikipedia

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

   An early method of ventilation was the use of a ventilating fire near an air vent which would forcibly cause the air in the building to circulate. English engineer John Theophilus Desaguliers provided an early example of this when he installed ventilating fires in the air tubes on the roof of the House of Commons.

5. Dorade box - Wikipedia

   en.wikipedia.org/wiki/Dorade_box

   A dorade box (also called a dorade vent, collector box, cowl vent, or simply a "ventilator") is a type of vent that permits the passage of air in and out of the cabin or engine room of a boat while keeping rain, spray, and sea wash out.

6. Vent (tailoring) - Wikipedia

   en.wikipedia.org/wiki/Vent_(tailoring)

   A vent is a vertical slit rising from the bottom hem of a jacket or a skirt, generally to allow for ease of movement. [ 1 ] In the case of jackets, vents were originally a sporting option, designed to make riding easier, so are traditional on hacking jackets, formal coats such as a morning coat , and, for reasons of pragmatism, overcoats.

7. Duct (flow) - Wikipedia

   en.wikipedia.org/wiki/Duct_(flow)

   The duct board is formed by sliding a specially-designed knife along the board using a straightedge as a guide. The knife automatically trims out a groove with 45° sides which does not quite penetrate the entire depth of the duct board, thus providing a thin section acting as a hinge. The duct board can then be folded along the groove to ...