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Switch to Reverse Polarity On Ventline Vanair Trailer Roof Vent w/ 12V Fan

Question:

Is it possible to add some type of switch that would allow the unit to be used in either direction exhaust or inlet?

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Expert Reply:

You certainly can wire the fan of Ventline Vanair Trailer Roof Vent w/ 12V Fan part # VP-543SP in reverse polarity. I confirmed this with my technical contact at Ventline. Please note however, with this fan the air-moving capacity will be reduced to some degree. You will want a DPDT Center Off Toggle switch to accomplish this.

Ventline does not offer such a switch, but you will be able to pick one up at a hardware store.

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