Van Build - roof fan
Which fan
We went with MaxxFan 6200k. It has two unique features: inverse air flow and is usable during the rain.
Location
We decided to install only one fan. The location in front has the advantage that Promaster has a flat area perfect for installation. If we want it in the back, an additional adapter will be needed.
Be careful to avoid the supporting beams on the roof!
Installation
- draw the square in the roof for cutting.
- Cut the hole using jigsaw. We used blue tape along the cutting line to reduce vibration, and hung a trash back from below to collect the metal dusts. (it is intimidating for the first cut, but jigsaw is easy to maneuver to our surprise).
- file the cut smooth and apply seal and paint.
- applyButyl Tape on the fan flange (on the surface that will be touching the fan roof). The tape itself is a play dough like rubber but harder. make sure the surfaces are clean, or wipe with alcohol if needed.
- prepare a wood frame to be used from inside the van, so that screws can have something to bite.
- install the flange with top screws.
- install the fan and fasten the side screws.
- lastly, seal perimeter and screw heads with lap sealant. Note, lap sealant cures slowly during cold weather. It took almost a week to cure with close to freezing temperature.