ROBERTSON VENTILATION INTERNATIONAL
Exhaust Systems
Smoke/Heat Release (QDP)

Coefficient of Discharge: (open) 0.84
(closed) 0.344

The Robertson QDP is designed as a dual purpose unit which, under normal conditions, functions as an efficient Slope Mounted Natural Ventilator. Should fire conditions occur, the unit will automatically open to provide an almost unrestricted exhaust area.


Typical Cross Section


Design features

  • Coefficient of Discharge: As determined by independent tests is a minimum of 0.344 with the lids closed, and 0.84 with the lids open.
  • Maintenance testing: Regular maintenance testing of all automatic smoke/heat release ventilators is a standard building code requirement. QDP Ventilators incorporate the necessary facilities to enable this testing.
  • Remote control systems: Can be provided with electrical or pneumatic remote control systems with zone control if required.
  • Base types: Available with a Type A, Type B (to fit a soaker sheet), or Type C (curb fixing base).
  • Materials: Can be supplied in a wide range of cladding materials including Versacor coated sheeting.
  • QDP vents are designed to meet international building code standards
Home Yardage Warehouse
QDP Ventilators
Home Yardage Warehouse, Sydney

Smoke/Heat Release Systems

When combined with regular fire-fighting equipment, fire ventilation can be extremely effective in minimising damage. Robertson Smoke/Heat Release ventilators are designed to release fire fumes and smoke from the interior of buildings through self-opening or remote controlled roof-mounted ventilators.

This helps reduce the spread of toxic fumes and gases within the building, allowing those inside to exit safely while improving visibility for those entering the building on fire-fighting tasks. In addition, Robertson Smoke/Heat Release ventilators help confine the heat released by fire to a small area, limiting damage due to the spread of heat and smoke. In the 1920's Robertson was the first to offer automatic dampers to control fire development in buildings.

Dimensions and Mass:
Unit
Vent Area m2
Dimensions (mm)
Mass
A
B
C
D
E
F
G
Versacor
Zincalume
Aluminium
415
0.47
770
1326
365
520
150
1220
215
33
29
23
615
0.70
770
1934
365
520
150
1830
215
39
37
27
724
1.30
1295
2262
610
952
170
2134
215
133
99
54

Specification

The ventilators shall be of the QDP type as manufactured by HH Robertson and shall be of the size as indicated on the drawings.

Ventilators shall be weatherproof under all positive pressure conditions and shall provide continuous natural ventilation when the internal dampers are in the open position, regardless of external weather conditions.

The ventilators shall be capable of withstanding a wind load of 1.44 kPa and shall have a free area of exhaust at least equal to the stack opening.

As fire ventilators, the units shall have a free area of vertical discharge at least equal to the stack opening and shall be fitted with fusible links rated to operate at 71 °C.

The ventilators shall be constructed in Versacor Protected Metal, Zincalume - Plain or Painted, or Aluminium.

Provision shall be made to permit manual operation from the roof for testing purposes without disturbing the release mechanism.

Options Available:
1. All dampers shall be constructed in two pieces and form an integrated part of the ventilator. ?? number of units shall be fitted with manual control dampers.

2. All units shall be provided with dampers which shall provide pressure relief on an increase of internal pressure in the building of ??.Pa.

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Smoke/Heat Release (QDP) Ventilator
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