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Drain-waste-vent system or plumbing drainage venting, pipes leading from fixtures to the outdoors; Duct (flow), used to deliver and remove air; Flue, a duct, pipe, or chimney for conveying exhaust gases from a furnace or water heater; Gas venting, a safe vent in the hydrocarbon and chemical industries; Medical ventilator, mechanical breathing ...
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.
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.
HVAC (heating, ventilation, and air conditioning) is a major sub discipline of mechanical engineering.The goal of HVAC design is to balance indoor environmental comfort with other factors such as installation cost, ease of maintenance, and energy efficiency.
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Hydrothermal vent; Venting in Drain-waste-vent system in plumbing; Venting in Permeability (foundry sand) Venting, in anger, a form of complaining; In science fiction, flushing someone into space without full anti-vacuum protection; The act of using a vent in the online multiplayer game Among Us
In the U.S., every plumbing fixture must also be coupled to the system's vent piping. [1] Without a vent, negative pressure can slow the flow of water leaving the system, resulting in clogs, or cause siphonage to empty a trap. The high point of the vent system (the top of its "soil stack") must be open to the exterior at atmospheric pressure.
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