Why AHRI 340/360 Should Not Be Used For DOAS Specs Department of Energy (DOE) regulate DOAS via ASHRAE 90.1’s minimum efficiency requirements. The certification program will help the U.S. An AHRI DOAS certification program is expected to be ratified sometime in the next two years, according to Ned Bent, associate certification engineer, AHRI. And, ASHRAE 90.1–2016 sets minimum efficiencies for DOAS product. The current standard AHRI 920-2015 laid the groundwork. For more on DOAS use in high-performance buildings, click here.Thanks to AHRI 920 Performance Rating of DX Dedicated Outdoor Air System Units, these complex questions are now being addressed.ĪHRI’s forthcoming standard 920-2018 due out later this year, continues the process for certified DOAS testing and establishes a clearer definition of efficiency ratings. What should consulting engineers use to compare DOAS products?.
The industry has for years compared packaged unit efficiency utilizing AHRI Standard 340/360, Performance Rating of Commercial and Industrial Unitary Air-Conditioning and Heat Pump Equipment. However, the absence of a test standard, certification program, and an efficiency rating target makes it near impossible for engineers and contractors to compare brands, models, and features. Louis, MOĭedicated outdoor air systems (DOAS) have become a staple of HVAC specifications over the last 20 years. By JOHN McKISSACK, P.E., Nortek Global HVAC, St.
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