Marine Air Flow International

Roof Mounted Fresh Air Intakes

Wheelhouse Fresh Air Supply

Recently released our new Roof Mounted Fresh Air Systems are perfect for your wheelhouse or even a cabin that requires fresh air input as an alternative to air conditioning the space.

Developed to meet Aus Ships' recently built new Brisbane river ferries, these systems are ordered as a complete kit, are simple to install and will help to keep your wheelhouse cool without exposing yourself to any weather conditions. 

We have supplied quite a few of these into the ferry industry but they also work well in small outboard patrol and pursuit craft when you are wanting to keep weight to a minimum and avoid the expense of running air conditioning. The fans are very power efficient and draw minimal power. 

Whats Included In A The Roof Mounted Fresh Air System?

Built to a standard size, our roof mounted systems include:
  • Custom designed rear facing intake hood with a built in two stage Air Intake Grille
  • A compact 10 inch 24v fan and duct with a built in air diffuser
  • The fan is wired to a potentiometer so as to regulate the air volume and noise.
  • Ceiling panel with a stylish cover and air directional input.


  • This System has been designed to  bring in fresh air into a cabin space where air conditioning is not being used.  
  • The Grilles has been designed to be mounted on the roof of the cabin with the specially designed 24v dc backward curved fan mount inside the grille 
  • This fan have been designed to handle high pressure at a low noise rate and still move a decent amount of air around the room. 
  • The system has a round air diffuser mounted in a standard style ceiling tile to fit in seamlessly with the rest of the ceiling
  • A flex duct is connected from the fan the air diffuser to ensure all the fresh air is direct straight into the cabin and not into the ceiling cavity. 
  • A 10-turn fan speed controller is wired into the fan this controller can control up 10 fans from the one controller and can be either mount in the bridge or at a control station the cabin.

All Systems Come Standard With:

  • Fan Housing from Fibre Reinforced Plastic.
  • Synthetic Impeller - Corrosion Proof.
  • Sealed marinized motor316 stainless steel fasteners
  • IP44 Rated
  • Ceiling diffuser
  • Flexible ducting pre mounted to fan
  • Powder coated to required colour
  • Install kit complete with everything to fit up to your vessel
Supplied with a full replacement 3 year warranty

Finished Product Details

Voltage:24 volt DC
AMP Draw:6.5A
Air Volume - Ltr/Sec420 l/s
DB Level @ 1.5M73 DB
DB Level @ 4M66DB
KG (complete unit)21KG
Roof Mounted Fresh Air System - Spec Data Sheet

Click on the link below to download our Roof Mounted Fresh Air System Specifications  Sheet (Spec Data Sheet).

Roof Mounted Fresh Air System Data Sheet

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These systems are prices at $3300.00 and are constructed to standard sizes.

Get in touch for more assistance.

A Roof Mounted Fresh Air System in place

One of our fresh air systems in place in a Brisbane River ferry. This system is keeping the wheelhouse cool and was installed quickly and easily.

Contact Us

Get in touch via phone, email or through our contact form and we will be pleased to assist with all your engine room ventilation needs. 


33-37 Paradise Avenue

Miami QLD 4220

6am to 4:30pm. Mon ~ Thurs


Mark:  office[at]

Brad:   info[at]


Mark:  +61 428 301 700

(Chief Estimator)

Brad:      +61 400 714 803