GSW Water-to-Water Series

The GSW Water-to-Water Series offers high efficiency with advanced features, extremely quiet operation and application flexibility at competitive prices. As ClimateMaster's most adaptable R-22 refrigerant units, the GSW Series can be used for radiant floor heating, snow/ice melt, chilled water for fan coils, industrial process control, potable hot water generation, hot/chilled water for make-up air, and many other types of HVAC and industrial applications.

Available in sizes 3 ton (10.6 kW), 5 ton (17.6 kW) and 10 ton (29.3 kW) the GSW Series offers a wide range of units for most any installation. The GSW has an extended range refrigerant circuit, capable of ground loop (geothermal) applications as well as water loop (boiler-tower) applications. Standard features are many. Microprocessor controls, G90 galvanized steel cabinet, polyester powder coat paint and TXV refrigerant metering device are just some of the features of the flexible GSW Series.

ClimateMaster's exclusive double isolation compressor mounting system makes the GSW Series the quietest water-to-water unit on the market. Compressors are mounted on vibration isolation springs to a heavy gauge mounting plate, which is then isolated from the cabinet base with rubber grommets for maximized vibration/sound attenuation. Options such as double-wall load heat exchanger (for potable hot water generation) and DDC controls allow customized design solutions.

The GSW Series Water-to-Water heat pumps are designed to meet the challenges of today's HVAC demands with a high efficiency, high value solution.


  • Sizes 036 (3 ton, 10.6 kW), 060 (5 ton, 17.6 kW) and 120 (10 ton, 29.3 kW)
  • Copeland scroll compressors
  • Dual refrigeration circuits on size 120
  • Exceeds ASHRAE 90.1 efficiencies
  • G90 galvanized steel construction with polyester powder coat paint
  • Unique double isolation compressor mounting with vibration isolation springs for quiet operation
  • Insulated compressor compartment
  • TXV metering device
  • Extended range (20 to 120°F, -6.7 to 48.9°C) operation
  • Microprocessor controls standard (optional DXM and/or DDC controls)
  • LonWorks, BACnet, Modbus and Johnson N2 compatibility options for DDC controls
  • Flush securely-mounted corner post water connections (no backup wrench required)
  • Compressor run and fault lights on the front of the cabinet
  • Seven Safeties Standard
  • Wide variety of options including double-wall load heat exchanger and UltraQuiet™ sound attenuation package