Marine Air Flow 20 Years On!

June 4, 2025

Brad Marsden

Director - Marine Air Flow International

35 Years Experience in the Marine Industry

View Brad's Info

Marine Air Flow is 20!

20 Years ago Marine Air Flow started in a farm shed in East Trinity. We had finally gotten really sick of the horrific hours that a marine maintenance business took and sold up. While Brad wanted to immediately immerse himself in something else, I insisted that he take a year off. And he did.


He spent a year fishing with his mate Rod, using his backhoe on the property we had (30 acres at East Trinity) and we also took a few trips overseas. When the year was close to ending, he started to put into place the plan for creating Marine Air Flow.


During our time with Profab, our prior business, engine room ventilation was something we just couldn't get. It was available offshore but seemed to be either one of two things: a less than great product, or constructed for military applications where the business wasn't interested in supplying to recreational vessels.


We had dabbled in creating a few "vents" as they were then called but the lack of a dedicated system stuck with Brad and when he was ready, that was what he decided to focus on.

The open face farm shed that Marine Air Flow started from.

It has been far from plain sailing and a MASSIVE amount of work, dedication and pure commitment from Brad has meant that today Marine Air Flow is a leader in its field. Not just in Australia either, we do more than 40% of our turnover as export today.


Things Have Gone Wrong

Very early on, Brad was bringing a new drill press home from Cairns city and avoiding a cane truck, it fell off the back of the trailer. That was devastating at the time. It was money we didn't have to spend again and despite insurance covering it, we had to wait 2 months for another to arrive. It seems so trivial now, but at the time it meant that I spent hours in the shed with Brad every month manually drilling fixing holes.


At one point after moving the whole thing to the Gold Coast, a staff member let us down very badly and Brad missed a holiday to Fiji to cover for it. That one sucked.


I got a steel sliver off a wire brush in my finger while I was doing some kind of finishing, which got horribly infected and put me off my own work for 3 weeks. Turns out you can't type with a finger bandaged to be the size of a sausage! That damn metal bit is there to this day! 


Brad jumped off the trailer at one point and ruptured the ACL in his knee. This was when we found out that directors aren't covered under workers comp. I had to use the insurance from a motorbike trip we were supposed to be doing in Africa to cover Brad's knee reconstruction. To this day, we've never done that trip.


About 3 years into Marine Air Flow, Brad went on a sales trip to WA which left us with $30 in our business account. I can't begin to explain just how scary that was!


There Has Been Some Amazing Achievements Along The Way


I remember the day that Riviera committed to us being their one and only supplier of ventilation equipment for all their new boats. It was so very exciting for us and we thank them for their amazing commitment to us over the last decade.


We now regularly do work for the Australian Government, local and international boat builders, foreign military projects, and even roll-on-roll-off ferries.


Some amazing outcomes:

  • Thian one of our mature age apprentices won Apprentice Of The Year, and Jacob has just been nominated this year for the second time.
  • We are now a team of 24 with team members from Myanmar, Thailand, Brazil, Spain, France & Argentina
  • Blake one of our original apprentices has now been with us 17 years. He is married with 2 children the oldest of which is 10!
  • Mark has been with us for around 14 years from memory, is also married and has a son now.
  • Joh our accounts person has been with us the entire way and we are so grateful to her for her hard work and putting up with Brad's receipt collecting. Her children that weren't even born when we started are almost fully formed humans now!
  • Our factory is now 1200 square meters and we could do with a little more space if I'm honest.
  • We won the Small Business Exporter of the Year award last year which was pretty epic, and then
  • We also won the AIMEX Exporter of the year this year in 2025.


Equipment has evolved from the manual drilling to CNC machines, laser cutters, automatic benders and we are currently investigating robotic welders.


We have evolved from Brad writing hand written invoices (remember those little carbon copy invoice pads?) to running almost our entire operation from the Zoho suite of software tools.


We now have over 30 products in our line up but our Air Intake Grilles still top the sales chart every quarter.


Our Website Has Been and Still Is One Of Our Biggest Assets

Yes, sure this is because I am a web developer by trade and we embraced the technology as a way to get our name and products out there. However, there have been multiple evolutions over the 20 years and will be more to come.


The original MAFI website!

Our Team Is Our Biggest Asset


We are always extremely grateful to our amazing team of very hard workers. Marine Air Flow has:

  • a production team,
  • a design team,
  • a estimating and quoting team,
  • a technical and development team,
  • an assembly and dispatch team and

team leaders for all of those along with a GM who keeps us all in line. Well maybe not Brad exactly!


Some of our team have mechanical engineering degrees, there's an MBA in there, and even a philosophy degree however you don't need  a formal qualification to work with us. Some of our best workers are fully self taught and are just as valuable to us as anyone else.


Some Numbers:


  • 4 - we work 4 days a week Monday to Thursday
  • 32 - monitors in our office
  • 27,000+ - The amount we spend on software per year!!
  • 4200+ - Cans of soft drink consumed from the smoko hut fridge per year
  • 1,000,000+ - Christmas lights in our electrical wizard Matt's house every year. Get in touch  at the end of the year for the address to see it. It's pretty amazing.
  • 1 - tonnage per month in spacer we have to use before Brad promised he would buy us a company Maserati! We are getting close....
  • 4 - Office dogs we've had. Squirt a 65 kg Great Dane, Miss Monroe a 40 kilo Hungarian Vizler, Prada an American staffy with a very distorted face from her cleft palate & Chloe an English staffy with a serious overbite!
  • 382 - The combined age of Guns and Roses band members when we all went to see them for our Christmas party in 2023.
  • 10 - The years our local Magpie Neil has been with us for. He has a damaged foot and the boys named him Neil after one of our guys who they said used to squark and carry on. He hangs out around the house and factory and comes in the smoko hut looking for crumbs most days. It will be a sad day when we realise Neil is missing.
  • 4000+ projects completed to date

Thank You


Thank you to our amazing team, our incredible clients and everyone who has helped us along the way.

They say it takes a village and in this case its more like a small city.


You all know who you are and we thank you from the bottom of our heart!


Jen

By Brad Marsden June 10, 2025
Optimising Engine Room Ventilation for Abu Dhabi’s High-Speed Ro-Pax Ferries As part of Abu Dhabi’s ongoing investment in advanced maritime infrastructure, the AD Ports Group commissioned two high-speed Ro-Ro ferries to operate between the UAE mainland and Delma Island. Carrying 250 passengers and 25 cars per trip at a service speed of over 30 Knots is pretty impressive , and you'd have to agree they are certainly very tidy looking Roll On Roll Off Ferries!! Designed for both passenger comfort and operational performance, these cutting-edge vessels required a ventilation solution that could meet the rigorous demands of the Gulf’s climate and the intense operating conditions of four powerful MTU engines per vessel. Our team was proud to be selected to design and deliver the engine room ventilation system for these state-of-the-art ferries, ensuring they remain safe, efficient, and reliable at sea. Engineering the Future of Fast Ferry Travel Built to carry up to 194 passengers and 25 vehicles, each of the 56-metre-long catamarans has been equipped with four MTU 16V4000M65L high-performance engines driving Kongsberg KaMeWa waterjets. This powerful propulsion setup enables cruising speeds of up to 35 knots, making the ferries among the fastest in their class within the region. Inside, the vessels feature modern amenities such as a VIP lounge, children’s play area, two cafes, five toilets, and full wheelchair accessibility, highlighting AD Ports Group’s commitment to both efficiency and passenger experience. Operating in the heat of the Persian Gulf, however, presents unique engineering challenges. The heart of this lies within the engine room where temperatures, airflow, and safety systems must be tightly controlled to prevent overheating, ensure compliance, and protect both crew and machinery. A Tailored Ventilation Solution for Demanding Conditions The brief for this project was clear: create a ventilation system that could not only manage the extreme thermal loads generated by four high-output marine engines but also comply with international marine safety standards, including fire isolation and redundancy protocols. Key features of the system we delivered include: Marine-Grade Ventilation Dampers : Built from corrosion-resistant stainless steel, our dampers are designed for longevity and reliability in a saltwater environment. Integrated Auto Close Capability : The dampers are configured to close rapidly in the event of a fire, helping to isolate the engine room and restrict oxygen supply. High Airflow Capacity : Designed specifically for the compact, high-output layout of the engine rooms, the system allows for maximum airflow and heat dissipation under full load. Moisture and Salt Mist Defence: Our Intake grilles are known globally for their excellent capability of reducing salt mist and spray into your engine room. Here they allow a vessel operating in already extreme conditions to require far less ongoing equipment replacement. Redundancy & Safety : With automated control options and manual overrides, the system ensures continuous operation and safety during engine shutdowns or emergencies. Delivering Results at Sea With the ventilation system now fully installed and operational, the Ro-Pax ferries have successfully completed sea trials and are ready to begin service. The performance of the engine room ventilation under load has exceeded expectations, maintaining optimal operating temperatures even during high-speed runs in the peak Gulf heat. In addition to thermal performance, the system’s fire isolation capability offers an added layer of safety, helping these ferries meet stringent international compliance standards while delivering peace of mind for operators and passengers alike. Reflecting on the Project This project underscores the critical importance of high-performance ventilation systems in modern vessel design. From the intense thermal loads of multi-engine configurations to the need for rapid fire response and corrosion resistance, every detail matters when it comes to marine safety and reliability. We’re proud to have played a key role in supporting this milestone for AD Ports Group and Abu Dhabi’s maritime future and we look forward to bringing this level of engineering excellence to future vessel builds across the region and beyond. Talk to Us About Your Marine Ventilation Needs Whether you’re designing a new-build high-speed ferry or retrofitting an existing vessel, we offer tailored ventilation solutions that combine safety, efficiency, and performance. Get in touch with our team today to learn how we can support your next marine engineering project.
Marine Air Flow has achieved JOSCAR certification, used by Military and Government organisations
By Brad Marsden June 5, 2025
Marine Air Flow has achieved JOSCAR certification, used by Military and Government organisations in Australia
A vessel in rough seas with multiple crew on deck.
By Brad Marsden February 19, 2025
Learn how Delta T optimizes engine room cooling on boats, ensuring performance, safety, and efficiency. Discover tips and trends for effective management.
Black Watch 40 with Marine Air Flow Teardrop Intake Grilles
By Brad Marsden January 30, 2025
Do you have a Black Watch 40 that has trouble with salt mist and over heating? You can retrofit an engine room ventilation system to solve that!
Marine Air Flow winning the 2024 Small Business Export Award
By Jenny Marsden November 23, 2024
We are very excited to announce that Marine Air Flow has won the 2024 Export Award for Small Business.
By Brad Marsden July 30, 2024
We are proud to announce we are the June 2024 winners of the Gold Coast Business Excellence Award.
The Woolgoolga RIB - another Marine Air Flow engine room ventilation project.
By Brad Marsden June 4, 2024
A new rescue vessel built by The Whiskey Group for the Australian Volunteer Marine Rescue team in New South Wales.
Svitzer Pilot transfer boat built by Dongara Marine with MAFI's engine room ventilation equipment.
By Brad Marsden May 29, 2024
Another completed project for Dongara Marine. This time a pilot transfer boat for Svitzer Marlin that will operate from Woodside Oil and Gas in the Pilbara.
North Sea Boats built X18 Armoured Troup Carrier with MAFI engine room equipment
By Brad Marsden November 13, 2023
North Sea Boats built X18 Armoured Troup Carrier launches with MAFI engine room equipment
Isn't this FAC patrol boat a weapon?
By Brad Marsden November 8, 2023
Another completed project by Marine Air Flow. This time an engine room ventilation project for this amazing patrol boat for the Indonesian Navy.
More Posts