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Persons and Metabolic Heat Gain
Metabolic heat gain from occupants in air conditioned spaces at different degrees of activities - in Watts
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The table below indicates the sensible and latent heat from people. The values can be used to indicate the heat loads handled by air conditioning systems.
Note that the values are based on older ISO and ASHRAE standards. Later ISO and ASHRAE standards should be checked for updated values.
| Degree of Activity | Typical Application | Average Metabolic rate - male adult (W) | Room Dry Bulb Temperature (oC) | |||||||||||
| 28 | 27 | 26 | 24 | 22 | 20 | |||||||||
| Sens. | Lat. | Sens. | Lat. | Sens. | Lat. | Sens. | Lat. | Sens. | Lat. | Sens. | Lat. | |||
| Seated at rest | Cinema, theatre, school | 100 | 50 | 50 | 55 | 45 | 60 | 40 | 67 | 33 | 72 | 28 | 79 | 21 |
| Seated, very light work | Computer working | 120 | 50 | 70 | 55 | 65 | 60 | 60 | 70 | 50 | 78 | 42 | 84 | 36 |
| Office work | Hotel reception, cashier | 130 | 50 | 80 | 56 | 74 | 60 | 70 | 70 | 60 | 78 | 52 | 86 | 44 |
| Standing, walking slowly | Laboratory work | 130 | 50 | 80 | 56 | 74 | 60 | 70 | 70 | 60 | 78 | 52 | 86 | 44 |
| Walking, seated | 150 | 53 | 97 | 58 | 92 | 64 | 86 | 76 | 74 | 84 | 66 | 90 | 60 | |
| Moderate work | Servant, hair dresser | 160 | 55 | 105 | 60 | 100 | 68 | 92 | 80 | 80 | 90 | 70 | 98 | 62 |
| Light bench work | Mechanical production | 220 | 55 | 165 | 52 | 158 | 70 | 150 | 85 | 135 | 100 | 120 | 115 | 105 |
| Moderate Dancing | Party | 250 | 62 | 188 | 70 | 180 | 78 | 172 | 94 | 156 | 110 | 140 | 125 | 125 |
| Fast walking | Mountain walking | 300 | 80 | 220 | 88 | 212 | 96 | 204 | 110 | 190 | 130 | 170 | 145 | 155 |
| Heavy work | Athletics | 430 | 132 | 298 | 138 | 292 | 144 | 286 | 154 | 276 | 170 | 260 | 188 | 242 |
- 1 W = 3.41 Btu/hr
Body Heat Generated
- moderate activity- seated, very light work - computer working
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Related Topics
- Air Conditioning - Air Conditioning systems - heating, cooling and dehumidification of indoor air for thermal comfort
- Air Psychrometrics - The study of moist and humid air - air condition - psychrometric charts, Mollier diagrams, air temperature, absolute and relative humidity, moisture content and more .
- Physiology - Human physiology, air quality and comfort temperatures, activity and metabolic rates, health effects of carbon monoxide and more
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Related Documents
- Area per Person - Common area per person in buildings - values can in general be used calculating indoor climate loads
- Met - Metabolic Rate - The Met is often used as a measuring unit of human body heat production
- People and Heat Gain - Heat Gain from Occupants in Air Conditioned Spaces - in btu/hr
- Predicted Mean Vote Index (PMV) - The PMV index predicts the mean response of a larger group of people
- Wet Bulb Globe Temperature (WBGT) - The WBGT can be used to measure the general heat-stress index
