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Natural ventilation is the intentional passive flow of outdoor air into a building through planned openings (such as louvers, doors, and windows). Natural ventilation does not require mechanical systems to move outdoor air. Instead, it relies entirely on passive physical phenomena, such as wind pressure, or the stack effect. Natural ventilation ...
The design of the direct vent fireplace allows for such a high level of efficiency because of the sealed firebox. The sealed firebox only allows combustion gasses to leave the system and exit the building. Since it is sealed, no warm air from the room is able to be drawn into the firebox and expelled out of the building. [8]
Joseph W. Walker of Malden, Massachusetts, applied for a US patent for a basic louvered window in 1900.He was issued patent no. 687705 on November 26, 1901. [5] A popular hand-cranked glass, aluminum and screen window combination was later designed by American engineer Van Ellis Huff and found widespread use in temperate climates before the advent of air conditioning. [6]
Modern louvers are often made of aluminum, metal, wood, or glass.They may be opened and closed with a metal lever, pulleys, or through motorized operators. [4]The Australian Standard specifies requirements for the construction of buildings using louver in bushfire-prone areas in order to improve their resistance to bushfire attack from burning embers, radiant heat, flame contact and ...
Rooftop HVAC unit with view of fresh-air intake vent Ventilation duct with outlet diffuser vent. These are installed throughout a building to move air in or out of rooms. In the middle is a damper to open and close the vent to allow more or less air to enter the space. The control circuit in a household HVAC installation.
5 – Filter compartment 6 – Mixed (recirculated + outside) air duct A rooftop packaged unit or RTU An air handler , or air handling unit (often abbreviated to AHU ), is a device used to regulate and circulate air as part of a heating, ventilating, and air-conditioning ( HVAC ) system. [ 1 ]