Ethen,

With your LEED submission, include a supporting narrative with precise and consistent with use of the terms UFAD and thermal displacement ventilation (TDV). Not all UFAD systems achieve TDV throughout the zone and not all systems that do deliver air under the floor. The EDR simulation guidelines and the design briefs do a decent job of distinguishing these facts. The design briefs also pick up on the zone air distribution effectiveness (Table 6-2) of ASHRAE Standard 62. I strongly believe that designs and energy models should incorporate the impact of air distribution effectiveness.

Good luck,

Paul Riemer, PE, LEED AP BD+C