CSA Standard CAN/CSA Z412-00 (R2011) - "Office Ergonomics" gives acceptable ranges of temperature and relative humidity for offices in Canada. These values are the same as recommended by the American Society of Heating, Refrigerating, and Air Conditioning Engineers (ASHRAE) Standard 55 - 2010 "Thermal Environmental Conditions for Human Occupancy". The recommended temperature ranges have been found to meet the needs of at least 80% of individuals. Some people may feel uncomfortable even if these values are met. Additional measures may be required.
Conditions |
Relative Humidity |
Acceptable Operating Temperatures |
|
°C |
°F |
||
Summer (light clothing) |
If 30%, then |
24.5 - 28 |
76 - 82 |
If 60%, then |
23 - 25.5 |
74 - 78 |
|
Winter (warm clothing) |
If 30%, then |
20.5 - 25.5 |
69 - 78 |
If 60%, then |
20 - 24 |
68 - 75 |
|
The USEPA recommends that humidity levels be kept between 30-60% to decrease fungal growth. IAQ Analytics recommends optimal humidity to be 45-55%. High levels of humidity can contribute to fungal growth, whilst low humidity can tend to contribute to dry skin conditions.
IAQ Analytics recommends that, if your temperature or humidity readings fall outside of the levels recommended, you contact your professional to discuss the appropriate measures to correct this issue/s.