AMST - Air Handlers and Coils

The AMST Multi-Position, 9-Speed ECM air handler with internal TXV is optimized for single-stage AC and HP outdoor units up to 15.2 SEER2.

Energy Efficient Air Handlers
  • Energy-Efficient
  • Multi-Position

UL2-40 Logo

IO Attachment PDF 3.84 MB

* Complete warranty details available from your local dealer or at To receive the 10-Year Parts Limited Warranty, online registration must be completed within 60 days of installation. Online registration is not required in California or Québec. The duration of warranty coverage in Texas and Florida differs in some cases.



•  Internal factory-installed thermal expansion valves for cooling and heat pump applications

•  7mm evaporator coil tube size on 1½ - 3½ Ton models and ⅜" evaporator coil tube size on 4 to 5 Ton models

•  Direct-Drive, 9-speed ECM blower motor

•  All-aluminum evaporator coil with high performance coated fin stock

•  Coil mounting track for quick repositioning

•  Optimized for use with R-410A refrigerant

•  Cabinet air leakage less than 2.0%at 1.0 inch H₂O when tested in accordance with ASHRAE standard 193

•  Cabinet air leakage less than 1.4%at 0.5 inch H₂O when tested in accordance with ASHRAE standard 193

•  3 kW – 25 kW electric heater kits

•  AHRI certified; ETL listed


  • 11/2 to 5 tons
  • Electronic Expansion Valve (EEV) for cooling and heat pump applications
  • Integrated communicating ComfortBridge™ Technology
  • Variable-speed ECM blower motor
  • Provides constant CFM over a wide range of static pressure conditions independent of duct system
  • Improved humidity and comfort control
  • Horizontal or vertical configuration capabilities

Product Limited Warranty+

All functional parts are covered by a 10-Year Parts Limited Warranty*. For a full description of this product warranty, please click on the consumer brochure or product warranty links above.

The AMST is factory-sealed to achieve a 2% or less leakage rate and the cabinet is fully painted in an Architectural Gray finish.

Additional Information

Before purchasing this appliance, read important information about its estimated annual energy consumption, yearly operating cost, or energy efficiency rating that is available from your retailer.