A vent is a building component that allows air, gases, or moisture to escape or enter systems for proper airflow and pressure control.

In construction, a vent is an opening or device designed to allow air, gases, moisture, or fumes to flow in or out of a building or mechanical system. Vents play a critical role in maintaining indoor air quality, regulating pressure, and preventing the buildup of moisture or harmful gases within enclosed spaces.

Vents are used across multiple building systems, including plumbing, roofing, HVAC, and combustion appliances. Common examples include plumbing vents that equalize pressure in drain systems, roof vents that release heat and moisture from attics, dryer vents that exhaust lint-laden air, and HVAC vents that distribute conditioned air. Each vent type is designed for a specific function and environment.

From a code and performance perspective, proper vent sizing, placement, and termination are essential. Building and mechanical codes regulate vent materials, clearances, and discharge locations to ensure safety and efficiency. When correctly installed, vents protect building components, improve system performance, and contribute to occupant comfort and health.

Plumbing vents are often called “stink pipes” because they release sewer gases above the roofline—keeping odors out of occupied spaces.

• Direct Vent
• Gable Vent
• Intake Vent