SCHOFIELD, Wisconsin (December 9, 2024) – Direct gas-fired make-up air units from Greenheck now use R-454B, an A2L refrigerant mandated by the Environmental Protection Agency with low potential to contribute to global warming. Because R-454B has mild flammability potential, the units underwent third-party testing from Intertek for all relevant product safety standards, including UL 60335-2-40. The tests certified that the refrigerant leak detection and mitigation systems are operating at full effectiveness.
Greenheck’s Model DGX units, which provide 100% outdoor air, also feature packaged direct expansion (PDX) cooling, housing all cooling components in one compact rooftop unit. Their improved design also includes microchannel coils, which have parallel flow tubes with tiny channels that carry refrigerant. Compared to standard coils, microchannel coils are on average 40% smaller, use 50% less refrigerant, and transfer heat 40% more efficiently.
For more information on Greenheck’s direct gas-fired make-up air units, visit https://www.greenheck.com/products/air-conditioning/make-up-air/direct-gas-fired-make-up-air-units.
To go more in depth into the refrigerant transition and safety testing, read our application article: mua101-24_thesafetyofa2lrefrigerants.pdf
About Greenheck:
Greenheck is a global leader in engineering and manufacturing air movement, control, conditioning, and distribution equipment. For more than 75 years, we have been committed to promoting the highest levels of indoor air quality by offering the widest range of ventilation products for commercial and institutional buildings. Through superior customer service, we continue our legacy of innovation as experts in air movement by connecting our mechanical representative partners and customers with the newest products. With our CAPS® product selection tool and HVAC University product education series, Greenheck offers technology and product knowledge to ensure that when you work with us, you are working with the easiest company to do business with.
To learn more, visit www.greenheck.com or contact Greenheck, P.O. Box 410, Schofield, WI 54476-0410, (715) 359-6171, FAX (715) 355-2399.
The post Greenheck’s Direct Gas-Fired Make-Up Air Units Now Feature R-454B Refrigerant first appeared on HVAC Insider.
