Nortek B6VMAX Series, Air Handler with TXV, 14-16 SEER, R-410A Refrigerant, Features: Energy Efficient Variable Speed ECM Motor: Advanced technology provides 16 field-selectable cooling airflows and automatically sets heating airflows based on the amount of installed heat. Quiet Blower Operation: Extra quiet and smooth blower on and off cycles. Constant airflow: Motor automatically adjusts to different static loads. Reduced air stratification: This results in improved air quality by optimizing humidity removal and filtration capabilities. Multi-poised: Can be used in horizontal, Upflow, Downflow and vertical applications. Built in Filter Rack: Makes the air handler easy to service. Plug-in Heater Kit: Available in 5 kW through 30 kW (Not for use in 115 Volt units) Circuit Board: Incorporating blower time delay relay, low voltage terminal strip, and heat-strip sequencing. Breaker Accessibility: Breaker accessible from the front of the unit when heater is applied. Plastic Drain Pan: Provides corrosion resistance. Durable Cabinet: Galvanized steel with a polyurethane finish. The finish will endure 950 hours of salt spray and resist corrosion 50% better than comparable units. Designed to meet the requirements 610.2.A.2: Meets Florida building code requirements for air leakage. Thermal Expansion Valve: Factory installed externally equalized thermal expansion valve provides precise refrigerant control under varying load conditions. Cabinet Insulation: 1' insulation with an R-value of 4.2 contributes to quiet operation and prevents cabinet sweating in difficult applications. Anteater Coil Technology: Copper alloy with zinc additives to stop formicary corrosion.