Multistack LLC, a privately held Sparta, Wis.-based manufacturer of chiller systems and heat pumps, recently acquired Desert Aire Corp., a Germantown, Wis.-based manufacturer of commercial and industrial humidity- and climate-control systems.

Multistack will operate Desert Aire as a wholly owned subsidiary. The two companies will maintain their separate headquarters and engineering and manufacturing facilities. The executive teams of the two companies will remain intact.

Multistack employs more than 160 people at its Sparta facility, where the company manufactures cooling, heating, and energy-recovery solutions under the brand names of Multistack, Airstack, MultiPRO, and MagLev.

Desert Aire employs more than 80 people at its Germantown facility.