Apollo Mono single flap roof ventilator

The Apollo Mono natural flap ventilator provides both smoke and day to day ventilation. It conforms to EN 12101-2, and is a cost effective way of providing smoke and heat exhaust ventilation. It has a simple design as well as very many different variants and sizes.

Product information

Features and benefits

Wide range of applications - Apollo Mono is classed as a dual purpose ventilator, providing both day to day and smoke control ventilation. 

Efficient and weather resistant - Apollo Mono is aerodynamically efficient. The sealing system consists of EPDM profiles which keep air leakage down to a minimum. Where ventilation is required in all weathers, please refer to the Apollo ATI.

Durable - Apollo Mono is manufactured from tough, corrosion resistant aluminium with stainless steel hinges. It has been tested and certified as fall-through-proof in 300J and 1200J tests by an external test house. It is manufactured under the ISO 9001 quality and ISO 14001 environmental management standards.

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

High thermal performance – The ventilator is highly insulated and air tight, meeting or exceeding today’s energy savings regulations.

High acoustic performance – With the aluminium lidded version, a sound reduction of up to 29 dB (R’w) may be achieved.

Quality of manufacture - Apollo Mono is manufactured under the ISO 9001 quality standard. Each unit is given a functional test before despatch.

We are at your service

We provide a pre-order design service. We also offer complete project management, installation, wiring and commissioning, which means that we take complete responsibility to ensure that the product is in full working order within one package of works.

Please contact us for more information relating to the application, specification, installation or servicing of this product.



The Apollo Mono natural flap ventilator provides both for day to day and smoke ventilation. Apollo conforms to EN 12101-2. It allows extract ventilation for most kinds of industrial buildings and is usually installed on the roof. Polycarbonate versions allow the entry of natural daylight.

Dimensions / size range

  • From 800mm to 1800mm throat width in 1 mm increments.
  • From 800mm to 2300mm throat length in 1mm increments.

Upstand options

  • Conical upstand, 400 mm or 500 mm high
  • Straight upstand, 400 mm or 500 mm high

Either with bitumen sheets or an adhesive roofing film

Lid options

  • 20 mm clear or opaque polycarbonate, 7 skins, 6 chambers
  • 20 mm grey (non light transmitting) polycarbonate, 7 skins, 6 chambers
  • 24mm double skin insulated aluminium infill panel

Either with brushes or rubber seals to reduce air leakage when closed.

Colours/ finishes options

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

Fixing options

  • Fixing onto curb
  • Fixing onto glazing
  • Fixing onto Curtain walling
  • Fixing onto roof sheeting

Controls options

  • Smoke ventilation: Pneumatic cylinder
    (Day-to-day ventilation: either by a pneumatic cylinder, or a 230 V AC electric actuator)
  • Smoke ventilation: 24V DC electric actuator
    (Day-to-day ventilation by a 24 V DC electric actuator)

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.



Aerodynamic coefficient Varies with size and options, up to 0.74
Reliability RE 1,000 (+10000 cycles)
Wind load  Varies with size and options, classified at WL 1500 (1,500 N/m²) to WL 7141 (7,141 N/m²)
Snow load  Varies with size and options, up to 2,793 N/m² 
Resistance to heat B 300 
Low temperature temperature operation T(-15)
Materials resistance to fire E (to EN 13501-1)
U value

Up to 1.31 W/m²K

Air permeability

(Following the guidelines of DIN 18055)

Leakage at 100 Pa, class 1 to 4, depending on the unit version
Sound insulation Up to 29 dB R‘w
Fall through proof Tested up to 1200 Joule


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

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