Underfloor air distribution systems (UFAD) provide a continual supply of fresh ventilation air directly to the lower zone where people breathe, while warmer/stale air rises toward the ceiling. The colder air supplied from the central air source down to the zone mixing unit provides better overall space humidity control. Ventilation effectiveness, individual temperature control/thermal comfort and improved energy performance are all key benefits of an underfloor system that can help qualify your building for U.S. Green Building Council LEED® certification.

Carrier offers zone mixing boxes, perimeter fan coils, and diffusers as part of a complete UFAD system.

• Underfloor Air Distribution Systems

Model Details	Description	Airflow (Cfm)	Key Document
45X	Fan-Powered Zone Mixing Box	50 - 6,200	Product Catalog
45U	Series Flow Fan-Powered Unit	280 - 1,200	Product Catalog
42K	Perimeter Fan Coil Unit	325 - 2,800	Product Catalog
35BF-R	High Induction Swirl Diffuser		Product Catalog
35BF-D	Linear Floor Diffuser Plenum		Product Catalog
35BF-V	Linear Variable Air Volume Diffuser Plenum with Damper		Product Catalog
35BF-CT	Linear Bar Diffuser		Product Catalog

Learn about underfloor air distribution systems.

Download equipment selection software for underfloor air distribution systems.