Since our lower bunk has no a/c or heating ducts, it can get stuffy for our granddaughter. So I decided to add a speed controlled fan to ventilate the lower bunk area with air from the living room of our Eagle HT 26.5BHS.
Here is the finished install:
From inside the lower bunk:
The components included a 70 mm computer fan and a 12V dc speed controller:
The computer brushless ball bearing 12V dc fan I already had is similar to this one: https://www.amazon.ca/uxcell[emoji24...sr=1-6-catcorr
The fan is mounted in a ABS cap I modified and then attached to the aluminum tube.
The speed controller was purchased on Amazon: https://www.amazon.ca/dp/B07SQQTK6M/...709270_TE_item
I already had a white vent. The black was also purchased on Amazon: https://www.amazon.ca/dp/B0095TEPI0/...709270_TE_item
I used a 4 1/4" diameter hole saw for cutting the hole for the "fan tube":
I will need to wait until next season to give it a real world test since the FW is going into winter storage next week.