Temperature & Humidity Test


The purpose of the Temperature and Humidity Test is to demonstrate the capability of the installation’s air-handling system to maintain the air temperature and humidity level within the control limits and over the time period agreed between the customer and supplier for the particular area being tested.


Refer Annex I (Table 1: Minimum Instrumentation requirements)


General Temperature and Humidity Test:

  1. This test is performed following completion of the airflow uniformity tests and adjustment of the air-conditioning system controls.
  2. This test should be performed at least 1 hour after the air-conditioning system has been operated and the conditions have been stabilized.
  3. The temperature and humidity should be measured at a minimum of one location for each temperature-controlled zone.
  4. The probe position should be selected with due consideration of the presence of heat sources.
  5. The temperature probe should be positioned at work-level height and at a distance of no less than 300 mm from the ceiling, walls, or floor of the installation.
  6. After sufficient time is allowed for the sensor to stabilize, the temperature and humidity Test reading at each location should be recorded.
  7. Measurements should be performed as appropriate for the purpose of application and the measurement time should be at least 5 min with one value recorded at least every minute.
  8. The test should be carried out for 3 consecutive days “at Rest” and “in Operation” condition respectively.


Temperature and humidity Test levels and requirements as specified in the contract documents or as agreed between the customer and the supplier.


By agreement between customer and supplier, the following information and data should be recorded:

  1. Type of tests and measurements, and measuring conditions;
  2. Type designations of each measurement instrument and apparatus used and its calibration status;
  3. Measurement point locations (A diagram showing all of the locations where temperature and humidity readings were taken. Assign an identification grid number or letter to each location)
  4. Record the measurement time, Temperature, and relative humidity for each location.
  5. Report the following data for each temperature and relative humidity
  • Number of readings
  • Minimum readings
  • Average of the readings
  • Maximum readings, and
  • The deviation of the maximum and the minimum readings from the mean

6. Occupancy state(s).

The frequency of the Temperature and humidity Test should be once a year.

For More Post Related to HVAC

  1. SOP For Airflow Velocity and Uniformity Test
  2. SOP For Temperature and Humidity Test