Vents serve diverse physical and mechanical functions across different systems, most notably in plumbing, architecture, and heating. Three primary types of vents include plumbing roof vent stacks, which equalize air pressure in drainage pipes to protect P-trap water seals; HVAC supply or return vents, which circulate heated or cooled air throughout residential and commercial building spaces; and clothes dryer exhaust vents, which safely expel hot, lint-laden air and moisture from appliances directly to the outdoor environment.
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