Calculator for the Heating Power of Humans
Calculates with how many watts a number of people heat. By burning food in their bodies, humans generate energy, which, among other things, is used to maintain their body temperature. This energy is released to the outside as heat. The more active a person is, the higher is this heating capacity. Clothing keeps the heat on people and thus reduces the heating output. The figures relate to adults of average height and are rough estimates.
Heat output during activitySleep: 80W Sedentary work: 120 watts Light physical exertion: 200 watts Heavy physical exertion: 500 watts |
Clothing factor(Almost) no clothes: 1 Normal clothes: 2 Winter clothes: 3 |
The formula for the calculation is: Pg = n * P / f
Example: 8 people with light summer clothing (f=1.5) in an office with mostly sedentary work but who have to get up and walk around frequently (P=140) heat with 747 watts.
Thermal image of a person, photography in infrared.
Of course, heating a room by cramming lots of people in is generally not a sensible heating method. But taking people's heat output into account can make sense for some calculations. This is particularly true for rooms that are expected to be occupied by large numbers of people, such as lecture halls. If these people are also moving, for example through sports or dancing, their heat output also increases. In this case, the additional heating can and should be reduced accordingly to prevent overheating in such rooms, which can lead to health problems. Of course, when there are lots of people, it is all the more important to ventilate sufficiently to ensure there is good air to breathe, which, depending on the outside temperature, can render heating ineffective anyway.
Here you can convert metric units into customary and imperial units and convert temperature units.
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