AAON's EXTREME Series Rooftop Unit Wins DOE Challenge with Dual Fuel at -20°F
AAON's Alpha Class EXTREME SERIES rooftop unit completed the DOE Commercial Building HVAC Technology Challenge with true simultaneous dual fuel capability and AHRI certification. The unit delivers more heating capacity than competitors at low-ambient temperatures down to -20°F and is available in 3–40 ton models for immediate commercial orders.
1. DOE Challenge Certification
AAON’s Alpha Class EXTREME SERIES rooftop unit completed laboratory evaluation of the DOE Commercial Building HVAC Technology Challenge, achieving AHRI certification (#217285043) with true simultaneous dual fuel operation that no other commercially available packaged rooftop unit offers.
2. Simultaneous Dual Fuel Performance
The system uses an air source heat pump as the primary heating source and seamlessly engages its natural gas furnace under extreme demands, delivering certified performance to -20°F—10°F colder than the DOE requirement—for superior low-ambient heating capacity.
3. Commercial Deployment and Market Impact
Field-proven across North America, including second-winter operations in Canada, the EXTREME SERIES is available now in 3–40 ton models and has already secured multiple commercial orders for retrofitting existing buildings without full infrastructure overhauls.
4. U.S. Manufacturing and Testing Capabilities
Engineered, manufactured, and headquartered in Tulsa, Oklahoma, AAON leverages its Norman Asbjornson Innovation Center—the only lab testing HVAC equipment from -20°F to 130°F for up to 540 tons—to maintain forward-compatible design per upcoming AHRI 1340 standards.