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An attic fan installed underneath a roof. A powered attic ventilator, or attic fan, is a ventilation fan that regulates the heat level of a building's attic by exhausting hot air. A thermostat is used to automatically turn the fan off and on, while sometimes a manual switch is used. An attic fan can be gable mounted or roof mounted. Additional ...
A whole house fan pulls air out of a building and forces it into the attic space or, in the case of homes without attics, through an opening in the roof or an outside wall. This forces air from the living areas into the attic and out through the gable and/or soffit vents, while at the same time drawing air from the outside into the living areas ...
Louvered attic vent in a gable Modern building codes permit both vented and unvented attics in all climates, if a building is otherwise correctly constructed. [ 5 ] However, unoccupied attics should usually be ventilated [ 6 ] to reduce the accumulation of heat and moisture that contribute to mold growth and decay of wood rafters and ceiling ...
An axial belt-drive exhaust fan serving an underground car park. This exhaust fan's operation is interlocked with the concentration of contaminants emitted by internal combustion engines. Mechanical ventilation of buildings and structures can be achieved by the use of the following techniques: Whole-house ventilation; Mixing ventilation
Passive cooling covers all natural processes and techniques of heat dissipation and modulation without the use of energy. [1] Some authors consider that minor and simple mechanical systems (e.g. pumps and economizers) can be integrated in passive cooling techniques, as long they are used to enhance the effectiveness of the natural cooling process. [7]
In this case, the ventilation systems of the mechanical floor are seen as gable vents, dormers, or abat-sons (louvers in a bell tower). Examples include some buildings in UCLA , like Dodd Hall, which has a mechanical floor disguised as an attic and a bell tower.
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