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Ventilation

Ventilation

Ventilation


Natural ventilation of industrial and commercial buildings, or of the above ceiling roof space in air-conditioned buildings, is a cost-effective means of exhausting hot air or achieving a sufficient degree of air change in the building.


Natural ventilation should also be considered as a means of venting smoke in a fire situation and as a means of helping to control condensation by removal of warm moist air from the building space.


The roof system can be designed to incorporate a series of Ampelair Turbo Ventilators.
Design information is given in this section to enable estimation of exhaust airflow rate and hence a reasonable basis on which to design for the air changes required.

Ampelair Wind Driven Ventilators

Ampelair Wind Driven Ventilators


  • Locked-on rotor mechanisms prevents loss or damage in high winds.
  • Corrugated vanes provide more strength and stability.
  • Square to round base on all models.
  • Sealed dual bearing system excludes dust, grit and other foreign matter and retains lubricant.
  • Paint finish available to match roof selection.
Model
Throat Diameter (mm)
Zincalume®
Throat Diameter (mm)
Aluminium
AS150
Throat Diameter (mm)
-
150
AS200
Throat Diameter (mm)
-
200
AS300
Throat Diameter (mm)
-
300
-
Throat Diameter (mm)
AA360
360
AS450
Throat Diameter (mm)
-
457
-
Throat Diameter (mm)
AA460
46
AS600
Throat Diameter (mm)
AA600
600

For design calculations refer to section 2.4.4.1.2 of Technical Manual

Table 2.4 Exhaust Capacity, m3/s
Stack Height Metres
Wind Speed m/s
Temp Diff °C
150 Throat ⌀ (mm)
200 Throat ⌀ (mm)
300 Throat ⌀ (mm)
360 Throat ⌀ (mm)
460 Throat ⌀ (mm)
600 Throat ⌀ (mm)
3
Wind Speed m/s
1.5
Temp Diff °C
6
150 Throat ⌀ (mm)
0.038
200 Throat ⌀ (mm)
0.068
300 Throat ⌀ (mm)
0.152
360 Throat ⌀ (mm)
0.214
460 Throat ⌀ (mm)
0.350
600 Throat ⌀ (mm)
0.609
Wind Speed m/s
Temp Diff °C
12
150 Throat ⌀ (mm)
0.039
200 Throat ⌀ (mm)
0.070
300 Throat ⌀ (mm)
0.158
360 Throat ⌀ (mm)
0.221
460 Throat ⌀ (mm)
0.362
600 Throat ⌀ (mm)
0.630
Wind Speed m/s
Temp Diff °C
18
150 Throat ⌀ (mm)
0.042
200 Throat ⌀ (mm)
0.074
300 Throat ⌀ (mm)
0.166
360 Throat ⌀ (mm)
0.233
460 Throat ⌀ (mm)
0.382
600 Throat ⌀ (mm)
0.664
Wind Speed m/s
5
Temp Diff °C
6
150 Throat ⌀ (mm)
0.084
200 Throat ⌀ (mm)
0.150
300 Throat ⌀ (mm)
0.336
360 Throat ⌀ (mm)
0.472
460 Throat ⌀ (mm)
0.772
600 Throat ⌀ (mm)
1.343
Wind Speed m/s
Temp Diff °C
12
150 Throat ⌀ (mm)
0.086
200 Throat ⌀ (mm)
0.152
300 Throat ⌀ (mm)
0.344
360 Throat ⌀ (mm)
0.483
460 Throat ⌀ (mm)
0.791
600 Throat ⌀ (mm)
1.377
Wind Speed m/s
Temp Diff °C
18
150 Throat ⌀ (mm)
0.088
200 Throat ⌀ (mm)
0.157
300 Throat ⌀ (mm)
0.352
360 Throat ⌀ (mm)
0.494
460 Throat ⌀ (mm)
0.808
600 Throat ⌀ (mm)
1.408
5
Wind Speed m/s
1.5
Temp Diff °C
6
150 Throat ⌀ (mm)
0.039
200 Throat ⌀ (mm)
0.070
300 Throat ⌀ (mm)
0.158
360 Throat ⌀ (mm)
0.221
460 Throat ⌀ (mm)
0.362
600 Throat ⌀ (mm)
0.630
Wind Speed m/s
Temp Diff °C
12
150 Throat ⌀ (mm)
0.046
200 Throat ⌀ (mm)
0.082
300 Throat ⌀ (mm)
0.183
360 Throat ⌀ (mm)
0.258
460 Throat ⌀ (mm)
0.420
600 Throat ⌀ (mm)
0.732
Wind Speed m/s
Temp Diff °C
18
150 Throat ⌀ (mm)
0.047
200 Throat ⌀ (mm)
0.084
300 Throat ⌀ (mm)
0.189
360 Throat ⌀ (mm)
0.264
460 Throat ⌀ (mm)
0.431
600 Throat ⌀ (mm)
0.751
Wind Speed m/s
5
Temp Diff °C
6
150 Throat ⌀ (mm)
0.086
200 Throat ⌀ (mm)
0.153
300 Throat ⌀ (mm)
0.344
360 Throat ⌀ (mm)
0.483
460 Throat ⌀ (mm)
0.791
600 Throat ⌀ (mm)
1.377
Wind Speed m/s
Temp Diff °C
12
150 Throat ⌀ (mm)
0.089
200 Throat ⌀ (mm)
0.158
300 Throat ⌀ (mm)
0.354
360 Throat ⌀ (mm)
0.497
460 Throat ⌀ (mm)
0.813
600 Throat ⌀ (mm)
1.414
Wind Speed m/s
Temp Diff °C
18
150 Throat ⌀ (mm)
0.092
200 Throat ⌀ (mm)
0.164
300 Throat ⌀ (mm)
0.367
360 Throat ⌀ (mm)
0.515
460 Throat ⌀ (mm)
0.844
600 Throat ⌀ (mm)
1.467
9
Wind Speed m/s
1.5
Temp Diff °C
6
150 Throat ⌀ (mm)
0.042
200 Throat ⌀ (mm)
0.074
300 Throat ⌀ (mm)
0.166
360 Throat ⌀ (mm)
0.233
460 Throat ⌀ (mm)
0.381
600 Throat ⌀ (mm)
0.664
Wind Speed m/s
Temp Diff °C
12
150 Throat ⌀ (mm)
0.047
200 Throat ⌀ (mm)
0.084
300 Throat ⌀ (mm)
0.180
360 Throat ⌀ (mm)
0.264
460 Throat ⌀ (mm)
0.431
600 Throat ⌀ (mm)
0.751
Wind Speed m/s
Temp Diff °C
18
150 Throat ⌀ (mm)
0.052
200 Throat ⌀ (mm)
0.093
300 Throat ⌀ (mm)
0.210
360 Throat ⌀ (mm)
0.295
460 Throat ⌀ (mm)
0.483
600 Throat ⌀ (mm)
0.839
Wind Speed m/s
5
Temp Diff °C
6
150 Throat ⌀ (mm)
0.088
200 Throat ⌀ (mm)
0.157
300 Throat ⌀ (mm)
0.352
360 Throat ⌀ (mm)
0.494
460 Throat ⌀ (mm)
0.808
600 Throat ⌀ (mm)
1.408
Wind Speed m/s
Temp Diff °C
12
150 Throat ⌀ (mm)
0.092
200 Throat ⌀ (mm)
0.164
300 Throat ⌀ (mm)
0.367
360 Throat ⌀ (mm)
0.515
460 Throat ⌀ (mm)
0.843
600 Throat ⌀ (mm)
1.467
Wind Speed m/s
Temp Diff °C
18
150 Throat ⌀ (mm)
0.093
200 Throat ⌀ (mm)
0.166
300 Throat ⌀ (mm)
0.371
360 Throat ⌀ (mm)
0.522
460 Throat ⌀ (mm)
0.855
600 Throat ⌀ (mm)
1.486