Built to withstand commercial R-410A and HFC applications

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this HVAC pressure switch protects the equipment from operating under hazardous low-pressure conditions that could lead to coil icing or motor burnout

This comprehensive service kit is engineered to restore factory-spec relief valve functionality

and 90000 series range hoods

Resideo MARD-8 Damper 319852-301 Built to withstand commercial R-410AThe Resideo MARD 8 is a heavy duty 8 inch modulating automatic round damper designed for high performance bypass and zone control in commercial and residential HVAC systems. Built with a 22 gauge galvanized steel shell, this single blade damper features a male crimped and female uncrimped end for seamless integration with rigid or flexible ductwork. A primary application for this 3 wire motorized damper is managing bypass air in systems larger than