WCO natural louvred ventilator

WCO can provide extract ventilation as well as allow the entry of natural daylight for most kinds of industrial and commercial buildings. Its top section provides maximum ventilation and this can also be used for emergency smoke extract ventilation, although it is not certified as a smoke ventilator. Two controllable side dampers provide day to day ventilation when it is raining.

Product information

WCO louvred ventilators are well suited to most industrial and some commercial buildings. If rainy weather makes it necessary to close the top louvres, continuous weatherproof ventilation can be enabled by opening the side dampers.

Features and benefits

A wide range of applications - WCO can provide both day to day and smoke control ventilation, although it is not certified as a smoke ventilator.

Polycarbonate versions allow the entry of natural daylight. There are pneumatic, electric or hand controls and a wide range of louvre types, accessories and finishes.

Various control options - The pneumatic control can be extended to incorporate a rain sensor, so that when it rains the top louvres automatically close and simultaneously the side louvres open. If used as a smoke ventilator, activation is either by a local thermal fuse which opens the unit at a pre-selected temperature, or by the controls responding to an external release signal. (Please note that it is not certified as a smoke ventilator to EN 12101-2).

High performance - WCO is aerodynamically efficient and has a high resistance to weather.

Easy to install - WCO is delivered fully assembled to site and may be installed at any angle from the horizontal to 45º. It has a wide range of base profiles to suit all sheeting, curb or glazing applications.

Durable - WCO is manufactured from tough, corrosion resistant aluminium alloy, grade 3005 in accordance with EN 573-3, with stainless steel fixings. Louvres pivot on double nylon UV- resistant bearings. It requires very little maintenance.

Quality of manufacture - WCO is manufactured under the ISO 9000 quality standard. Each unit is given a functional test before despatch.

Design service - Colt provides a pre-order design service. Please contact Colt for more information relating to the application, specification, installation or servicing of WCO.

Options

Description

WCO can provide extract ventilation as well as allow the entry of natural daylight for most kinds of industrial and commercial buildings. Its top section provides maximum ventilation and this can also be used for emergency smoke extract, although it is not certified as a smoke ventilator. Two controllable side dampers provide day to day ventilation when it is raining. 

Material

All principal components manufactured from corrosion resistant aluminium alloy grade 3005 in accordance with EN573-3, with stainless steel fixings.

Dimensions/ size range

  • Nine width options from 550mm throat width to 1900mm throat width
  • 21 length options available from 638mm to 3298mm throat length

Louvre options

Depending on the application, the louvres on the top of the ventilator are made from:

  • Single skin aluminium
  • Double skin aluminium
  • Twin wall clear or opaque polycarbonate

These louvres incorporate either low-loss brush seals (for aluminium louvres) or rubber seals (for polycarbonate louvres) to reduce air leakage when the ventilator is closed. The side louvres have the option for low-loss brush seals.

Base Fixing Type

Aluminium base profile to suit:

  • sheeting
  • curb
  • glazing curtain walling systems

Controls

  • Pneumatic
  • 24V DC electric
  • 230V AC electric
  • Manual

For both electric and pneumatic versions, activation is either by double action locking mechanisms, or failsafe open / failsafe closed options.

If used as a smoke ventilator, activation is either by local thermal fuse which opens the unit at a pre-selected temperature, or by responding to an external release signal. (Please note that it is not certified as a smoke ventilator).

Decorative Finish

  • Mill finish
  • Polyester powder paint to a RAL colour, standard 75 mu

Guards

Factory fitted guards to the inside the throat of the ventilator avilable:

  • bird
  • insect
  • security

Performance

Performance

U value Varies with size and options, from 3.2 to 6.0 W/m2/K*
Aerodynamic coefficient Varies with size and options, up to 0.7
Sound insulation 10.0-15.0 dB

* In many cases a U value of at least 3.5 W/m²/K is required to meet local Regulations. This value can be achieved or surpassed if the ventilator is installed on an upstand which protrudes above the outer membrane of the roof. Colt can advise on this.

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