[arcticdude]

I did a much less elegant, though similar setup in my inverter bay. Due to the cables already in place and my lack of desire in trying to run a cable most of the length of the coach, I mounted my Cerbo way up front next to my Touch 50. The option of using the internal relays would have been difficult.

So I used a 105 degree snap disc triggering a 4” pancake fan blowing out an existing floor hole. I attached a section of dryer vent hose to the fan, terminating it just above the upper surface of one of the Quattros now in the coach. So it sucks hot air off the bay ceiling and blows it out through the floor.

Comparatively crude, but it works.