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Appendix Two: Thermal Comfort Sensation Scales
Many thermal comfort sensation scales have been established; one is presented as an example in table A-1 below. This scale recognizes 15 degrees of comfort and discomfort with regard both to heat and humidity and 5 degrees with respect to air freshness.
Table A2.1.Thermal comfort sensation scale
Heat |
Humidity |
Air Freshness |
|||
| Unbearably hot | +7 | Unbearably moist | +7 | ||
| Much too hot | +6 | Much too moist | +6 | ||
| Too hot | +5 | Too moist | +5 | ||
| Hot | +4 | Moist | +4 | Very stuffy | +2 |
| Too warm | +3 | Too humid | +3 | ||
| Warm | +2 | Humid | +2 | Stuffy | +1 |
| Comfortably warm | +1 | Comfortably humid | +1 | ||
| Neutral | 0 | Neutral | 0 | Comfortable | 0 |
| Comfortably cool | -1 | Comfortably dry | -1 | ||
| Cool | -2 | Dry | -2 | Fresh | -1 |
| Too cool | -3 | Too dry | -3 | ||
| Cold | -4 | Parched | -4 | Very fresh | -2 |
| Too cold | -5 | Too parched | -5 | ||
| Much too cold | -6 | Much too parched | -6 | ||
| Unbearably cold | - 7 | Unbearably parched | -7 | ||
In applying this scale to a practical situation, one determines the degrees that correspond to the sensation and notes down the corresponding code from table A-1 and the time of observation on a record sheet similar to the example shown in table A-2 along with other relevant data.
Table A2.2. Typical data sheet for environmental conditions and thermal comfort observation
| Outdoor Weather Conditions | Date | |||
| Description of Room | Location | |||
Observations |
||||
| Instrument | Measurement | 1 | 2 | 3 |
| Time of observation | ||||
| Whirling hygrometer | °C Dry bulb | |||
| °C Wet bulb | ||||
| °C Wet bulb | ||||
| Temp. difference | ||||
| From tables or chart | % Relative Humidity | |||
| From tables or chart | Dew Point | |||
| Globe thermometer | G. T. °C | |||
| Silvered thermometer | S. T. °C | |||
| Kata thermometer | Cooling times | |||
| Factor: | ||||
| Range: | ||||
| Glass or silvered | ||||
| From nomogram | Cooling power | |||
| Air velocity | ||||
| Effective temperature | ||||
| (Normal-scale nomogram) | E. T. °C | |||
| Effective temperature | ||||
| (Basic-scale nomogram) | B.E.T.°C | |||
| Corrected effective temperature (Basic-scale nomogram) | G.E.T. (B)°C | |||
| Mean temperature of surroundings | M.T.S. °C | |||
| Equivalent temperature nomogram | Equiv. Temp. °C | |||
| Thermal comfort sensations | ||||
| Sensation | Time | |||
| a. Heat | ||||
| b. Moisture | ||||
| c. Freshness | ||||
| Name________________________ | Posture or work_______ | Weight_____________ |
| Age and sex___________________ | Last meal: time________ | |
| nature________ | ||
| Clothing_______________________ |