Front Return Air HandlersFeatures Front or Bottom* Return (*Requires RXHK-B01/B02 Kit) Flow Check Piston for cooling or heat pump operation Wall-hanging brackets Built in Filter Rack (Uses Standard Filter Sizes) Suitable for R-410A or R-22 Refrigerants (RHAL Only) AHRI Certified UL Certified Molex Plug Connections for field installed heater kits Dual Voltage Direct Drive Blower with multi-speed motor Thermoplastic Drain Pan with bottom primary and secondary connections Optional Decorative Grill for front return applications (RXHK-C01/C02) Optional Decorative Wall Grill (RXHK-D01) Factory Installed Condensate Float Switch which shuts off the outdoor unit in event the condensate pan becomes clogged