Heat Sources and Convective Air Flows

Convective air flows from some common heat sources - people, computers, radiators and more

The below can used as an indication of the convective heat flow some common heat sources generates.

Source Convective Air Flow
liter/sec
1.1 m above floor 1.8 m above floor
Room with
height < 3 m
People, sitting relaxed 15 - 20 40 - 50
People, sitting working 15 - 20 40 - 50
People, standing working 15 - 20 40 - 50
Fax 15 - 20 30 - 40
Table lamp, fluorescent tube 3 - 5 10 - 15
Table lamp, bulb 10 - 15 25 - 30
PC 15 - 20 40 - 50
Copy machine 15 - 30 40 - 70
Window /m2 3 - 5 3 - 5
Radiator 5 - 10 5 - 10
Room with height > 3 m People, sitting relaxed 15 - 20 40 - 50
People, sitting working 15 - 20 40 - 50
People, standing working 15 - 20 40 - 50
Over head projector 20 - 30 60 - 70
TV and video 20 - 30 50 - 60
Window /m2 3 - 5 3 - 5
Radiator 5 - 10 5 - 10
Industry People, moderate work 40 - 50
People, heavy work 40 - 50
Welding machine 100 - 150

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