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More Cooling Options for Make-Up Air

September, 2025

Greenheck’s Model DGX and Model MSX make-up air units with packaged direct expansion (PDX) have increased their cooling and airflow options in housing size H22. When configured with PDX, these units now offer airflow up to 9,000 cfm and have added cooling capacities at 7, 10, and 16 tons, expanding their range for make-up air applications. Both units use environmentally friendly, EPA-compliant R-454B refrigerant for PDX cooling, with chilled water and evaporative cooling as alternatives. The redesigned Model DGX with PDX provides direct gas-fired heat up to 1,200,000 Btu/h and incorporates microchannel coils, which are smaller, use less refrigerant, and transfer heat more efficiently. Model MSX is available with electric heat, steam coils, or hot water coils.

Greenheck Model DGX-P116 Make-Up Air Unit

 

Greenheck make-up air units are ideal for warehouse, kitchen, industrial, and commercial applications. With total performance capacities from 800 to 64,000 cfm, heating up to 7,000,000 Btu/h, and 3 to 16 tons of packaged cooling, Greenheck’s make-up air products can meet a wide range of ventilation, heating, and cooling needs. For more information, please see our product page: https://www.greenheck.com/products/air-conditioning/make-up-air.

 

About Greenheck

Greenheck is a global leader in engineering and manufacturing air movement, control, and conditioning 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.