Quick and Easy Retrofit - Fast installation for replacement of many existing rooftop units - fits high volume competitor’s roof curbs;R-410A Refrigerant - Environmentally friendly;Single Speed Scroll Compressor - Furnished on 036 through 060 models;Two-Stage Scroll Compressor - Furnished on 074 models. Allows rooftop units to deliver just the necessary amount of cooling needed to meet the space’s demand;Eco-Last Coil System - Smaller, lighter condenser coil;High Pressure Switch - Protects compressor;Direct Drive (ECM) or Belt Drive Blower Motors - Multi-tap ECM direct drive motors (all 036 thru 060 models). Belt drive motors (036 thru 074 3ph models). Two-speed belt drive motor (low static/high static) 074 models maximizes air performance;Downflow or Horizontal Airflow - Easy field conversion;Two Fork Lift Slots on Three Sides - Easy to pick up and transport units from almost any angle;Corrosion-Resistant Drain Pan - Provides application flexibility, durability and improved serviceability;Common Components - Many maintenance items are standard throughout the entire product line, reducing the need to carry different parts to the job or maintain in inventory