AirVent

An air vent, or airvent, is a device or opening that allows air to enter or exit a space or a system. In buildings, vents are part of heating, ventilation, and air conditioning (HVAC) systems and serve to supply conditioned air, exhaust stale air, or both. Architectural vents include grilles, diffusers, and registers installed in walls, ceilings, or floors, as well as roof vents used to vent attics and other spaces. They influence airflow patterns, thermal comfort, and indoor air quality, and may be fixed or adjustable. Many vents contain dampers to regulate flow and prevent unwanted backdrafts. Materials range from metal to plastic and are chosen for durability, moisture resistance, and fire performance.

In roofing and exterior applications, vents such as soffit, ridge, and turbine vents provide passive exhaust paths for heat and moisture. In interior spaces, performance depends on proper placement, sizing, and integration with ducts and filters. Noise, leakage, and energy use are common design considerations, along with fire-rated construction in certain compartments.

A related use of the term applies to plumbing and hydronic systems. Automatic air vents or air release valves vent trapped air from water supply lines, heating loops, and boilers, helping to prevent air locks and improve efficiency. They are typically located at high points and may operate automatically or be manually opened when needed.

Design, installation, and maintenance practices follow local building codes and HVAC standards. Vent systems must balance ventilation rates, energy efficiency, and occupant comfort, with routine inspection of grilles, dampers, and automatic vents to ensure proper operation. Some products carry brand names such as AirVent, but the generic concept covers both architectural vents and plumbing air release devices.