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Convective Air Flow from Typical Heat Sources

Convective air flow from typical heat sources - like people, computers, radiators and more

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The table below indicates the convective heat flow generated by some common heat sources.

SourceConvective Air Flow
(liter/sec)
1.1 m (3.5 ft) above floor1.8 m (6 ft) 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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