Unit Ventilators (UVNT)


Program Scope

The certification program includes unit ventilators with outside air ventilation and return air dampers capable of providing ventilation air of at least 80% of rated standard air flow, with the capability of providing any combination of these functions: humidity control, circulation, heating or cooling, and filtering of air. Humidity control and heating or cooling, supplementary to the ventilation air, may be remote or an integral part of the unit. The equipment is designed for the free delivery of air but may be applied with minimal duct work having a static resilience not greater than 0.50 in of water [125 Pa]. The unit ventilator can be either vertical floor standing or horizontally mounted in or adjacent to the space it serves and is generally provided with air capacities of 3000 cfm [1416 L/s] or less.

Certified Ratings

The following certification program ratings are verified by test:

  • Total cooling capacities, Btu/h[W]
  • Sensible cooling capacity, Btu/h[W]
  • Power input, Watts, [W]
  • Insulation efficiency [pass/fail]
  • Low voltage start [pass/fail]
  • Standard air flow, %
  • Ventilation air flow, SCFM

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.