Central Station Air-Handling Unit Casings (AHUC)


Program Scope

The certification program includes: enclosure which houses the fans, coils, filters, and other components of the CSAHU. It is generally made of metal and lined where necessary with material for thermal insulation and/or acoustic attenuation. It is portion of CSAHU that contains the air that is being conditioned, is exposed to the fan pressure, and separates the conditioned air from the surrounding air. The size limitation on the certification program is AHUC no larger than 150 ft2 in exterior air tunnel cross-sectional area.

Certified Ratings

  • Casing Deflection Rating Class
  • Casing Air Leakage Class
  • Thermal Transmittance Class with Leakage
  • Thermal Transmittance Class without Leakage
  • Thermal Bridging Class

The rules and procedures for obtaining and maintaining certification are detailed in the Resources section above. The specific Standard listed above details the technical requirements for rating and publishing your product performance, the AHRI General Operations Manual (OM) details the program operational rules that are generic to all of AHRI’s certification programs and lastly, the Product-specific Operations Manual provides the operational rules that are specific to this program along with the required documents and fees. Please ensure that you are familiar with the latest rules and procedures for this program.