Slope Mounted Ventilators
The Robertson Slope Mounted (RSM) ventilator
is a natural ventilation system ideally suited to
applications where ventilation needs are not
complicated or where rapid installation into
existing buildings is required. It is particularly
well suited to use on existing buildings and
for areas requiring spot ventilation such as
warehouses and light industrial workshops.
The RSM ventilator was designed to provide
optimum performance for its type, as well as
a low, streamlined appearance. Available in
three sizes, the RSM ventilator meets most
requirements for localised natural extract.
Design Features
Coefficient of Discharge: 0.344
Throat Sizes:
415: 1220mm x 385mm
615: 1830mm x 385mm
724: 2134mm x 609mm
• Coefficient of discharge minimum of 0.344
(determined by independent tests).
• Weathertight: Designed to exclude wind
and driving rain and provided with a hood to
prevent back-draught.
• Robertson Maxlite™ Ventilator: A standard
RSM fitted with a weather hood completely
manufactured from moulded translucent
sheeting to provide maximum light conditions
in addition to ventilation.
• Ease of installation: RSM ventilators can be
installed quickly and easily into all forms of
roofing, including existing structures.
• Base types: Type A (standard), Type B (to fit
soaker sheet), Type C (curb fixing base).
• Materials: Can be supplied in a wide range of
cladding materials.
Dimensions & Mass
| Unit |
Exhaust Opening (m2) |
Dimensions (mm) |
Mass |
| A |
B |
C |
D |
E |
F |
G |
Zincalume |
Zincalume |
| 415 |
0.47 |
770 |
1326 |
365 |
520 |
150 |
1220 |
215 |
20 |
14 |
| 615 |
0.70 |
770 |
1934 |
365 |
520 |
150 |
1830 |
215 |
26 |
16 |
| 724 |
1.30 |
1295 |
2262 |
610 |
952 |
170 |
2134 |
215 |
86 |
45 |
Exhaust Capacity Table
(cubic metres per second per metre run)
| Temp. Diff. x Eff. Ht (ΔT ºC x metres) |
| |
RSM 415 |
RSM 615 |
RSM 724 |
| 35 |
0.532 |
0.798 |
1.483 |
| 50 |
0.562 |
0.862 |
1.603 |
| 70 |
0.607 |
0.909 |
1.704 |
| 85 |
0.642 |
0.965 |
1.793 |
| 100 |
0.677 |
1.107 |
1.892 |
| 120 |
0.699 |
1.055 |
1.964 |
| 135 |
0.745 |
1.119 |
2.081 |
NOTE:
The above exhaust capacities are based on wind speed of 8 km/h.
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