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Commercial S-Class Rooftop Units

Superior Comfort, Efficiency and Performance.

Features and Benefits

  • Integrated Modular Controller – digital accuracy and enhanced unit performance with over 200 unit control functions.
  • 35- to 50-Ton Rooftop Units
  • Impressive diagnostic capability provides simple troubleshooting to reduce operation and service cost.
  • Multiple Compressors – allow the unit to provide efficient cooling with four cooling stages.
  • Heating Section – multiple gas valves and electric heating elements allow unit to provide up to four heating stages.
  • Stainless Steel Heat Exchanger – provides application flexibility and allows operation at low outdoor air temperatures.
  • Step-in Blower Compartment – improves access and reduces maintenance time.
  • Full-Perimeter Base Rail – provides greater structural integrity so the unit is easier to handle when rigging and transporting.
  • Independent Motor Mount – allows for easy, efficient access without removing top panel.
  • Coil Cleaning Access Door – improves internal coil access for better cleaning.
  • Slab Condenser Coil – permits faster, more thorough coil cleaning.
  • Removable Drain Pan – improves cleanability and indoor air quality (IAQ).

Reliable performance

  • Hinged Toolless Access Panels – provide quick access to components and protect panels and roof from damage during service.
  • Corrosion-Resistant Cabinet – galvanized steel cabinet under a two-layer surface protects against rust and corrosion.
  • Louvered Grill – protects coil from damage during installation, high wind and hail.
  • Enhanced Panel Design – provides rain, wind and hail protection of internal components.

Factory-installed Options

  • Humiditrol® Dehumidification System – improves IAQ through a patented dehumidification system capable of removing moisture based on actual humidity levels.
  • MERV 8, 11 and 15 High-Efficiency Filters – improve air filtration for better IAQ.
  • R-410A environmentally friendlier refrigerant (select models)
  • Double-Wall Construction – improves cleanability of internal surfaces for better IAQ.
  • Standard-Static Power Exhaust Fans – 50% and 100%.
  • High-Static Power Exhaust Fans – 50% and 100%, optional modulating capability.
  • Integral Energy Recovery Wheel – saves energy and reduces unit size needed for outdoor air ventilation.
  • Phase Monitor – prevents damage to electrical components from single phasing, phase reversal and low voltage conditions.
  • Integral Economizer – saves energy by using outdoor air for cooling when suitable.
  • Hot-Gas Bypass – allows unit operation in low air flow applications.
  • Outdoor Air CFM Control – helps maintain outdoor air volume for variable-air-volume units.
  • Capacity staging down to 25%
  • Refrigerant service valves
  • Variable-frequency drives on supply fan
  • Barometric relief dampers
  • Manual or motorized fresh air dampers
  • Liquefied propane gas ready (gas/electric units only)
  • Stainless steel heat exchanger (gas/electric units only)
  • Blower proving switch
  • Dirty-filter switch
  • Supply and/or return air smoke detector
  • Powered GFI (factory wired) and Non-powered GFI
  • Non-fused disconnect
  • Coil corrosion protection
  • Stainless steel drain pan
  • Third-party DCC options
  • System integration with BACnet® or LonTalk® protocol
  • Horizontal discharge
  • Spring vibration isolation, compressor
  • Spring vibration isolation, supply fan
  • Spring vibration isolation, high-static power exhaust fans
  • Export packaging
  • 30-180 KW Electric Heat (electric/electric units only)
  • 500 and 800 kBtuh Gas Heat (gas/electric units only)
  • Modulating gas (500 or 800 kBtuh gas/electric units only)
  • Low-temperature vestibule heater


  • 15-Year Limited Warranty on stainless steel heat exchanger.
  • 10-Year Limited Warranty on aluminized heat exchanger.
  • 5-Year Limited Warranty on compressor.
  • 3-Year Limited Warranty on Integrated Modular Controller.
  • 1-Year Limited Warranty on covered components.

For more information on HVAC warranties, take a look at our checklist.