Home > Companies > Colt International Ltd > Apollo ATI natural ventilator for weathered ventilation

Apollo ATI is a natural flap ventilator that can provide both full extraction through its top flaps and weathered ventilation via longitudinal side flaps. It is a dual purpose ventilator, providing both day to day and smoke control ventilation and is generally installed onto roofs, providing high level extract to most kinds of industrial buildings. Polycarbonate versions allow the entry of natural daylight. It is tested to and in compliance with EN 12101-2 and is CE marked. It is made from tough, corrosion resistant aluminium alloy and is manufactured under the ISO 9001 quality and ISO 14001 environmental management standards.


  • Certified performance.
  • Cost effective.
  • Durable.
  • Easy to install.
  • Energy efficient - highly insulated and air tight, meeting or exceeding today’s energy savings regulations.
  • Low maintenance.
  • Allows weathered ventilation.
  • A wide range of applications.
  • Tested and certified as fall-through-proof in 300J and 1200J tests by an external test house.

Related literature

The following content references this product:

Standard product features




Manufactured from corrosion resistant aluminium alloy grade 3005 in accordance with EN 573-3, with stainless steel fixings.


Used to reduce air leakage when closed.

Side flaps:

Side flaps and aerodynamic deflectors are set within a wind baffle to provide weathered ventilation.


  • Aerodynamic coefficient (Cv): Up to 0.69.
  • Reliability: RE 1000 (10,000 cycles).
  • Wind load class: Up to 1500 N/m².
  • Snow load class: Up to 5700 N/m² (electric), 1500 N/m² (pneumatic).
  • Resistance to heat: B 300.
  • Low ambient temperature operation: T(-15).
  • Materials resistance to fire: E (to EN 13501-1).
  • U value: Up to 3.4 W/m²K.
  • Air permeability: Class 3 (to EN 12207:2000).
  • Sound insulation: 26 dB R’w.


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

NBS Specification

NBS Create logo
This product is associated with the following NBS Create clause:
90-45-80/340 Natural smoke and heat exhaust ventilators

Product specification

An important note about specifying



Colt International Ltd


+44 (0)23 9245 1111

Product reference

Apollo ATI natural ventilator for weathered ventilation


 - Throat width:
[ ______ ]
 - Throat length:
[ ______ ]

Fixing type

 - Aluminium base profile to suit:

Frame finish

[Mill aluminium]
[Polyester powder coating, RAL]
Insert colour requirement.

Top flaps

[16 mm clear polycarbonate, 7 skins, 6 chambers]
[16 mm opaque polycarbonate, 7 skins, 6 chambers]
[16 mm opaque polycarbonate, external and internal sheet, single chamber]
[Double skin Insulated aluminium infill panel]


 - Type:
[24 V DC]
 - Operation:
[Double locking]
[Failsafe closed]
[Failsafe open]

Manufacturer details

Colt House,
Ridgeway Office Park,
Bedford Road,
Hampshire, GU32 3FQ
Tel +44 (0)23 9245 1111
Fax +44 (0)23 9245 4220
NBS Plus
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