Multivent

A flap type combination roof ventilator in mill finish aluminium

Introduction

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The unit is a multi-purpose roof mounted natural exhaust ventilator that benefits not only from opening top flaps but also controllable side dampers.

The side dampers are used to provide ventilation which can be boosted by opening the top flaps.

Application

Particularly suited to applications where ventilation is required with the feature of opening top flaps for increased ventilation, i.e. factories or commercial areas with heat sources which would otherise cause uncomfortable working conditions.

With the top flaps open, these units provide almost clear daylight openings and consequent psychological relief to personnel working in an enclosed environment.

Energy Conservation

Fitted with energy conserving draught strips to minimise heat loss when closed.

Weathering

The unit has an integral welded base skirt to fix down and flash to all types of building structures including roof upstands (can also be installed along the ridgeline).

Construction

Manufactured using aluminium BS EN 485 alloy, with side dampers, top flaps and controls all secured to the main ventilator body.

Sizes

Available with a 508mm wide throat width, with throat lengths from 1220mm up to 2896mm.

Options

  • Internal closure trim flashings
  • Bird guards or insect mesh
  • Security guards
  • Extended base flanges

Controls

Manual Nylon covered wire cable to:

  1. Clam Cleat/Clutch Control – variable setting.
  2. Winch – variable setting.
  3. Friction loaded – variable setting.

Pneumatic For day to day opening and closing, also enables optional connection to temperature sensors/building management systems.

Electric Actuation For day to day opening and closing, also enables optional connection to temperature sensors/building management systems.

Maintenance

Dampers and flaps are pivoted on double bush nylon bearings. Maintenance should be carried out in accordance with McKenzie-Martin’s recommendations.

System Design & Product Selection

Assistance with scheme design and product selection is offered by our experienced technical team.

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