Thermal Comfort and Discomfort Analysis

Thermal comfort may be estimated using International Standard ISO 7730 (2005) Ergonomics of the thermal environment — Analytical determination and interpretation of thermal comfort using calculation of the PMV and PPD indices and local thermal comfort criteria.

Thermal comfort is related to a human being's thermal sensation, which is mainly related to the thermal balance of his or her body as a whole.

This balance is influenced by physical activity and clothing, as well as the environmental parameters: air temperature, mean radiant temperature, air velocity and air humidity.

These factors can be measured continuously by QED Environmental Services as per ISO 7730, and the thermal sensation for the body as a whole has been predicted by calculating the predicted mean vote (PMV).

In addition, specific work settings may be investigated with regards to Discomfort Analysis.  These use in addition to the above parameters; directional radiation differences (i.e. a hot wall or glazing), and temperature difference of the floor, ankle, abdomen or head.

Measuring thermal comfort allows for;

• Identifying the cause of ongoing Tenant complaints, where all other tests or assessments have failed to
• Verifying the effectiveness of upgrades or changes to building services works
• Verifying mechanical consultant design