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# Convective Air Flows from Typical Heat Sources

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

Convective Air Flows from Typical 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

## Related Topics

### • Heating Systems

Design of heating systems - capacities and design of boilers, pipelines, heat exchangers, expansion systems and more.

## Related Documents

### Convective Air Flow - Single Heat Source

Calculate the vertical air flow and air velocity generated by a single heat source.

### Convective Heat Transfer

Heat transfer between a solid and a moving fluid is called convection. This is a short tutorial about convective heat transfer.

### Convective Heat Transmission - Air Velocity and Air Flow Volume

Hot or cold vertical surfaces generates vertical air flows - calculate air velocity and volume flow.

### Heat Transfer Coefficients in Heat Exchanger Surface Combinations

Average overall heat transmission coefficients for fluid and surface combinations like Water to Air, Water to Water, Air to Air, Steam to Water and more.

### Overall Heat Transfer Coefficients

Walls or heat exchangers - calculate overall heat transfer coefficients.

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