Field glossary

VAV box

Variable air volume terminal unit; a controlled damper, flow sensor, and optional reheat that conditions one zone

Used across 3 Anvilfield field guides, most in HVAC.

Also defined as

Terminal unit at each zone with a damper, controller, airflow sensor, and optional reheat coil
A commercial variable air volume terminal that throttles air to a zone, often with reheat

Where this shows up