Nortek B6BMM0 Series, Air Handler, 13 SEER, Features: Durable, Attractive Cabinet: Galvanized steel with a polyester urethane finish. The 950 hour salt spray finish resists corrosion 50% better than comparable units. The plastic drain pan is corrosion-resistant. Multi-poised: Can be used in horizontal, Upflow, Downflow and vertical applications. Multi-speed: Gives flexibility of installation. Ease-of-Service: Plug-in wire connections and built-in filter rack makes the air handler easy to service. Plug-in Heater Kits: Available in 5kW - 30kW (Not for use in 115 Volt units) Circuit Board: Incorporating blower time delay relay, low voltage terminal strip, and heat-strip sequencing. Air Handler Control Board: Controls time-sequencing of heat stages with field-selectable sequence timing. Breaker Accessibility: Breaker accessible from front of unit when heater is applied. No Fasteners on Sides or Back: Smooth surfaces for ease of installation. Designed to Meet the Requirements 610.2.A.2: Meets Florida building code requirements for air leakage. Micro-Channel Evaporator Coil: All aluminum design to prevent leaks caused by corrosion formicary. Cabinet Insulation: 1' insulation with an R-value of 4.2 contributes to quiet operation and prevents cabinet sweating in difficult applications