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For ventilation, the Flettner TCX-2 wind-powered vent was installed in the rear of Discovery right next to the camera. Reasonably easy to install without professional assistance, about an hour from start to finish. No electricity is needed for the fan as it is powered by wind or by convection currents inside the van. Cooler air from the floor pushes up the warmer air through the vent. The Flettner is designed using state-of-the-art computational low dynamics, the Flettner TCX-2 was created to maximise rotational efficiency and torque to produce very powerful extraction rates, making it particularly suited to being fitted to larger vehicles like the Sprinter.
At highway speeds, the air inside the Sprinter remains fresh as the Flettner pulls all the stale air out, and the front vehicle vents allow fresh air to enter.
When parked on a windy day, air inside the van is pulled out and replaced by fresh air from the slightly open windows in the front doors.
On a cold winter day with no wind, the Flettner continues to spin when the inside air is warmed by the Espar D2 heater with the hot air venting to the outside, keeping moisture and any subsequent condensation at bay.
When there is absolutely no wind on a hot day, the Flettner will not spin. In that case, a Rowenta electric fan is used to circulate air inside.
Flettner Vent - Installed on 10Jul2017
From beginning to end, the vent was reasonably easy to install. The install photos are shown below from completion to start. Final product first!
Modified: Fri, 19 Apr 2019 11:07:01 -0700