United Kingdom

Seefire natural louvred ventilator

Seefire is a natural louvred ventilator suitable for natural day to day and smoke control ventilation. Seefire conforms to EN 12101-2 and is CE marked. It can provide inlet or extract ventilation as well as permit the entry of natural daylight for most kinds of industrial and commercial buildings.

Product information

Seefire louvred ventilators are suited to most industrial and commercial buildings and are among the most cost-effective kinds of natural ventilators.

They are popular with Specifiers and Contractors because of the wide range of options available, and Building Operators and Owners because of their simplicity and low maintenance. 

Features and benefits

Wide range of applications- Seefire is classed as a dual purpose ventilator, providing day to day and smoke control ventilation and fire ventilation. Seefire can also be installed in the vertical either for low level air inlet or for high level extract.

Polycarbonate and glass versions allow the entry of natural daylight. Seefire smoke vent is also often used as a termination piece for large ducted or air handling systems. There are pneumatic, electric or hand controls and a wide range of louvre types, accessories and finishes

High performance - Seefire smoke vent is aerodynamically efficient and has a high resistance to weather. 

Easy to install - Seefire is delivered fully assembled to site and may be installed at any angle from the horizontal to the vertical. It has a wide range of base profiles to suit all sheeting, curb or glazing applications. Bases are customised to suit the installation into either curtain walling, glazing or prepared openings.

Durable - Seefire smoke vent is manufactured from tough, corrosion resistant aluminium alloy, grade 3005 in accordance with EN573-3, with stainless steel fixings. Louvres pivot on double nylon UV- resistant bearings.

Certified performance - Seefire has been exhaustively tested and certified to EN 12101-2: 2003 in accredited third party test laboratories and is CE marked. 

Quality of manufacture - Seefire is manufactured under the ISO 9001 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 Seefire.



Clear opening natural louvred ventilator. Dual purpose, for highly efficient natural ventilation and smoke control, and suited either for extraction or inlet. Tested to and in compliance with EN 12101-2. Made from tough, corrosion resistant aluminium alloy with stainless steel fixings.

Dimensions / size range

  • Six width options from 426mm throat width to 2336mm throat width.
  • Thirteen length options available from 705mm to 3498mm throat length.

There are some restrictions on the maximum size of the ventilator if glass louvres are used. Colt can advise on this.

Louvre options

Depending on the application, louvres made from:

  • Single skin aluminium
  • Single skin wired glass
  • Single skin laminated glass
  • Single skin toughened glass
  • Double skin aluminium
  • Twin wall clear polycarbonate
  • Twin wall opaque polycarbonate
  • Low-loss brush seals (for aluminium louvres)
  • Rubber seals (for glass or polycarbonate louvres) to reduce air leakage when closed.


  • No seals
  • Low-loss brush seals (for aluminium louvres)
  • Rubber seals (for glass or polycarbonate louvres)

These reduce air leakage when the ventilator is closed.

Colours/ finishes options

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

Fixing options

Suitable for fixing either onto a curb, into glazing, into curtain walling, or into roof sheeting.

Controls options

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

For both electric and pneumatic versions, either double-action locking mechanisms, failsafe open or failsafe closed.

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.

Other options / accessories

  • Bird guard
  • Insect guard
  • Burglar guard



Its performance varies with the size and options selected. Most tests to EN 12101-2.


Tested to and in compliance with EN 12101-2 and CE marked.

* 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.

Aerodynamic coefficient (Cv) up to 0.68
Reliability RE 1000 (10,000 cycles)
Wind load up to WL 4,000 N/m²
Snow load up to SL 2,000 N/m²
Resistance to heat B 300
Low ambient temperature operation T(00) to T(-25)
Materials resistance to fire B or E (to EN 13501-1)
U value up to 3.2 W/m2/K*
Sound insulation up to 11.0 dB R'w
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