Underfloor Air Distribution: Lessons Learned

HVAC systems using underfloor air distribution (UFAD) promise multiple benefits. These include: improving occupant satisfaction by providing control over personal air supply through use of manually adjustable diffusers; making building systems more flexible and easily reconfigurable, with the effect that churn can be less expensive; improving room ventilation by delivering fresh air closer to occupants; and reducing building energy use due to decreased central fan energy, extended economizer cooling, and improved cooling-cycle efficiency.