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Campervan Roof Vent Installation Guide (Maxxair Maxxfan Deluxe)

A campervan roof vent is a must if you are going to enjoy your experience on the road. A campervan without a fan will quickly become a sauna in the summer. Even worse, a fanless van will lead to very bad air quality in the van due to cooking, moisture, and general bad smells. To ensure your van has good indoor air quality, you need to install a campervan roof vent. In this guide I will show you how to very easily install a Maxxair Maxxfan Deluxe in your van conversion! I'm Shane, I've been teaching people to convert campervans for many years, I'm the van conversion instructor at Udemy, author of The Van Conversion Newsletter, and the proud owner of a beautiful self-build campervan called Beans. So let's jump in and have a look at campervan roof vent installation!

Campervan Roof Vent Installation Guide (Maxxair Maxxfan Deluxe)

This post contains affiliate links, which means that if you click a product link and buy anything from the merchant (Amazon, eBay, etc.) we will receive a commission fee. The price you pay remains the same, affiliate link or not. By using these links, you are helping me to continue writing free educational content!



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Supplies List 🛒

Bosch power drill

​Bosch power drill (800W)

For driving and drilling

​Hammerite metal paint

For protecting bare metal from rust

Metal file

​Metal file

For filing burrs on exposed metal



For cutting a hole in the side of your van!

Sikaflex 522


​A selection of clamps


​Timber (2X2)

Butyl tape

​Mastic / Butyl tape

To seal fan to the roof of the van

Gorilla glue

​Gorilla glue

Wood glue for the frame

What is the best campervan roof vent?

There are two brands most people will go for:

  1. Maxxair

  2. Fantastic

I personally have a Maxxair Maxxfan Deluxe and absolutely love it. These are the unique features of the Maxxfan;

  • It has a built-in rain shield, making it great for all weather conditions. SUPER IMPORTANT FEATURE!

  • It is a 10-speed reversible fan

  • Intake and exhaust

  • It has a programmable thermostat and a remote control

Another great option is the Fantastic fan. You can get the

  • Fantastic vent 7350 – best

  • Fantastic vent 1200 – budget

Maxxair Maxxfan Deluxe for a Van Conversion

Campervan Roof Vent Installation: Maxxair Maxxfan Deluxe

Step #1: Locate the site where you want to install the campervan fan

From within the vehicle, ascertain the roof section where you will install the campervan fan.

  • Mark out the cut lines of 400mm X 400mm on the interior (Maxxair Maxxfan Deluxe measurements).

  • Drill four holes in the four corners of your cut out markings

Step #2: Cut out the square in the roof

Hop onto the van roof and cut out the square with a jigsaw

Maxxair Maxxfan Deluxe for van conversion drill in roof
  • Get your jigsaw and cut out the square marked by the pilot holes.

  • Ensure you use oil (like WD-40) when using the jigsaw and hold it tight to prevent it from wandering

  • Stick a tarp (black garbage back) to the inside of the van to prevent metal shavings from going everywhere (which can cause rust to your van if left)

Maxxair Maxxfan Deluxe for van conversion hole in roof

Step #3: File the sharp edges

  • Use a metal file to smooth the rugged or sharp edges of the hole.

  • After that, you can smoothen the uneven edges further with fine sandpaper

Maxxair Maxxfan Deluxe for van conversion file exposed metal

Step #4: Clean the area around the space

  • Use isopropyl rubbing alcohol to clean any dirt and filings on the roof and around the cut-out. Do this both inside and outside the cut-out area. Doing this gets rid of the filings that can bring about rusting.

Step #5: Apply primer and metal paint on the cleaned area

  • After the alcohol dries, apply primer, then Hammerite metal paint. This will guard against corrosion in the future on the exposed metal

Step #6: Make a wooden frame for the campervan roof vent

a) Cut four pieces of 2X2 (inch) wood with measurements on the interior of 400mm X 400mm. I built the frame using mitre butt joints. I didn't actually have a mitre saw, so I was doing it by eye. If I were to do it again, I would use basic butt joints.

Maxxair Maxxfan Deluxe wooden frame dimensions

b) Glue the four pieces of wood together (Gorilla glue is the most popular choice for good reason). Clamp the pieces together and leave it overnight. I used corner clamps, but you can use regular clamps too.

Maxxair Maxxfan Deluxe wooden frame creating glue

Step #7: Add a Mastic/Butyl tape seal to the top of the van

The Ford Transit's roof is a farshot from flat (there are rungs along the surface). To smooth out the roof's surface so I could attach the fan, I applied strips of mastic tape. This has the added benefit of waterproofing the area too. Mastic tape is a bit like play-dough. You will need about 6m of Mastic tape.

  • Lay down strips of mastic tape on all four sides around the cut out area.

  • Lay down strips until the area is nice and level

Maxxair Maxxfan Deluxe for van conversion mastic butyl tape

Step #8: Stick the Maxxair Maxxfan Deluxe backing flange to the top of the van

  • First apply a thin bead of Sikaflex sealant/adhesive to the inside of the plastic backing

  • Then flip the plastic backing over and stick it onto the hole in the van

After placing down the plastic backing flange, adjust it on all sides of the hole so that it is evenly distanced from the edges.

  • Press the frame onto the mastic/butyl seal to make a water-tight bond.

  • Then clamp it down for a few hours

  • You can apply sealant around the edges of the mastic to double ensure you have a water-tight seal

Step #9: Stick the wooden frame to the inside of the van

  • First apply Sikaflex adhesive to the inside of the wooden frame

  • Then clamp the frame to the roof of your van from the inside

Step #10: Screw the Maxxair Maxxfan Deluxe plastic backing into the wooden frame

  • Hop onto the top of your van and screw down the plastic backing

  • Using self-drilling screws will make this much easier.

  • Put a little bead of silicone on top of each screw head when they are drilled in

Maxxair Maxxfan Deluxe screwing plastic backing into mastic tape

Step #11: Attach the body of the fan into the roof

  • Place the body of your Maxxair Maxxfan Deluxe into the plastic backing on the roof

  • There are four screws which attach the body to the plastic backing

Attach Maxxair Maxxfan Deluxe to van conversion

Step #12: Attach the fan trimming to the inside part of the fan

  • On the inside of the van, get the trimming and insert it to the fan.

  • Fit it into the frame with four screws.

Maxxair Maxxfan Deluxe plastic trim

Step #13 (Optional): Check whether the campervan fan installation was a success

The Maxxair Maxxfan Deluxe campervan roof vent comes with a remote control that you can use to switch on the fan and adjust its speed settings. If you already have your electrical system setup, wire up the positive and negatives and switch on the fan. If it starts working, then your installation was a success! 🥳🥳 If it fails, then there is a problem with the wiring. Recheck the wiring, and make sure that you have wired it correctly. If it fails to work again, change the fuse (it could have blown out). For this reason, always have spare fuses just in case.


I hope you found this guide to installing the Maxxair Maxxfan Deluxe Campervan Roof Vent useful! You are well on your way to a beautiful self-build campervan! Don't forget to subscribe to The Van Conversion Newsletter for everything you need to get started with your own van conversion.

Be sure to check out the rest of the Metalwork guides. Related articles include: bulkhead removal, van ladder installation, spare wheel carrier installation.

If you're converting a van but unsure of how to do it, you could also check out the Van Conversion Course on Udemy. In the course, you'll learn directly from me how to convert a van into your dream home - no prior experience needed!

Until next time,

Shane ✌️

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