1 Scope

This document provides a general overview, including terms and definitions and technical specifications for an underfloor air distribution (UFAD) system. A UFAD system includes a raised floor, a zone air handling unit (AHU), an underfloor plenum and underfloor air diffusers. This document is applicable to all types of systems which utilize underfloor plenum to supply conditioned air into the occupied space.

This document is not applicable to AHUs, ceiling-based air diffusers or displacement ventilation systems.