MRC-4 is a heavy duty air handling system with multi-stage filtration, pulse cleaned or disposable filters, cooling system, heating system and, when needed, acid gas absorbers. Adiabatic cooling is also available. The MCR-4 system uses airfoil backwardly inclined centrifugal fans and industrial duty dampers. Hot dipped galvanized and stainless steel heat exchangers are available for the most severe service. Units can be made of steel, aluminum, stainless steel, and galvanized welded sheet. MRC-4 units are fully wired and piped and mounted on a common skid base for rapid installation with little process down time.