An indirectly fired recirculating gas heater from Munters has received USDA approval, accepted for use in USDA-approved dairy plants. The VariMax IFRG Often used with spray dryers in the dairy industry, VariMax IFRG is manufactured by Munters, Amesbury, Mass.

According to the company, receiving approval involved having a USDA inspector visit Munters’ factory in 2009. He inspected the equipment, reviewed standard designs and noted required changes to meet USDA approval. Late in 2010, the inspector made another visit for final acceptance inspection. Units were subsequently installed at a dairy plant and passed the onsite USDA inspection.

According to Munters, VariMax IFRG systems are more than 90 percent efficient.