The Robertson Slope Mounted 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. Particularly well suited to use on existing buildings and for areas requiring spot ventilation such as warehouses and light industrial workshops. The RSM ventilator has been designed to give optimum performance for its type together with low streamlined appearance. Available in three sizes, the RSM ventilator will meet most requirements for localised natural extract.

Exhaust Capacity Table:
(cubic metres per second per unit)

Design features

• Coefficient of Discharge: As determined by independent tests is a minimum of 0.344
  
• Weathertight: Designed to exclude wind and driving rain and provided with a hood to prevent backdraughting.
• Robertson Maxlite Ventilator: A standard RSM fitted with a weathering hood completely manufactured from moulded translucent sheeting to provide maximum light conditions in addition to ventilation.
• Ease of installation: RSM Ventilators may be installed quickly and easily into all forms of roofing including existing structures.
• 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.
• Acoustics: Can be acoustically treated to suit specific project requirements.

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Specification

The ventilators shall be of the (select one) RSM or Maxlite type as manufactured by HH Robertson and shall be of the size shown on the drawings.

Ventilators shall be weatherproof under all positive pressure conditions and shall provide continuous natural ventilation as specified below regardless of wind velocity and direction.

The ventilators shall have a proven Coefficient of Discharge of 0.344 as certified by an independent test authority and each unit shall have an exhaust capacity of ?.m3/sec based on ?…°C temperature difference and ?…m effective height for a wind speed of ??km/hr.

The ventilators shall be designed to withstand a total wind load of 1.44 kPa (this can be varied to suit local conditons) and shall have a free area of discharge at least equal to the stack opening.

Ventilator stack is to be protected from direct exposure to the elements.

The ventilators shall be constructed of (select one) - Versacor Protected Metal, Zincalume - Plain or Painted, Aluminium.

Dampers (if required) shall be constructed in two pieces and form an integral part of the ventilators. Dampers shall be (select one) - Manually operated by chain (or cord), Pneumatically operated.