humidity

Humidity refers to the amount of water vapor in the air. Relative humidity is measured as a percentage.

Humidity is important for workplace comfort because it conditions the air and creates a different perception of temperatures.

The optimum humidity range for indoor environments is between 40% to 60%. This level ensures that employees can work comfortably, stay focused and remain healthy.

Maintaining a humidity level close to 50% reduces growth of dust mites, mould, mildew, diminishing the risk of bacteria and viruses surviving, and minimising off-gassing of VOCs.

Spaces with suboptimal humidity can be breeding grounds for infectious bacteria and viruses.

Excessively low or high relative humidity can introduce a range of respiratory issues, irritation to the skin and eyes, a reduction in mental focus, and general discomfort. In low humidity environments, viruses (such as the common cold or coronavirus) can also survive for prolonged periods. 

As a result, more illness may spread throughout the workspace which can affect efficiency and productivity.

what to do

Manage humidity levels by utilizing a humidifier/dehumidifier, shutting off equipment, or reducing air leakage.

Machinery generates heat and may contribute to an already dry environment, therefore, if possible, only run equipment when needed (this will also reduce energy costs!)

external reference

OC 311/2: Sick building syndrome (hse.gov.uk)



HSE - Thermal comfort: The six basic factors