Psychrometric Test Room

Psychrometric Test Room

Climatic Testing Systems, Inc. (CTS) designs and manufactures Psychrometric Test Rooms, in accordance with ASHRAE Standard 37, that are used by air conditioner manufacturers to determine the thermal performance of unitary air conditioners, split systems and heat pumps.

Dual, environmentally controlled rooms are used to simulate indoor and outdoor conditions. The Air Enthalpy Method is used to determine unit capacities and obtain heat balances. Code Testers utilizing AMCA nozzles and designed specifically to ASHRAE Standards, are used to provide accurate determination of the test unit air flows and outlet air conditions.CTS control software allows the user to perform all the ARI standard tests.

CTS offers Psychometric Test Rooms up to 150 Ton capacity with a 10:1 turndown range for each facility.

Indoor Dry Bulb Temperature40 to 104°F
4 to 40°C
± 0.2°F
Indoor Dew Point Temperature 35 to 86°F
2 to 30°C
± 0.3°F
± 0.2°C
Outdoor Dry Bulb Temperature -20 to 131°F
-26 to 55°C
± 0.2°F
± 0.1°C
Outdoor Dew Point Temperature 5 to 95°F
-15 to 35°C
± 0.3°F
± 0.2°C
Indoor and Outdoor Room Air Flows Up to 20,000 cfm
Up to 34,000 m3/hr
± 5%
Unit Under Test Voltage 90 to 600V ± 1%
Heat Balance
3% or better
1% or better
  • Editing of test programs
  • Automatic test sequencing
  • Loop calibration and calibration reports
  • Hardware checkout routine
  • Stability monitoring
  • Real-time tolerance adjustments
  • Real-time history graphing capability
  • Automatic test report generation
  • Data file management
  • Low Dew Point Control to 0°F
  • Automated Nozzle Open/Clost System
  • Cyclic Test
  • Defrost Test Automation
  • HSPF Calculations
  • Refrigerant Mass Flow Measurement with Refrigerant Side Capacity Calculations
  • 3% agreement or better, indoor code tester to outdoor code tester
  • 1% repeatability of test results