Underfloor Ventilation Techniques & Merchandise Key differences include the use of an underfloor air provide plenum, hotter supply air temperatures, localized air distribution and thermal stratification. Thermal stratification is one of the featured characteristics of UFAD techniques, which allows larger thermostat setpoints in comparison with the traditional overhead techniques http://sethblqtw.mybloglicious.com/20031045/helpful-bits-of-advice-about-smart-subfloor-ventilation-methods