On March 1, 2024 at 11:38, highfigh said...
I installed a flexible 3" duct going from the top of a cabinet to a basement, using a plastic quad outlet junction box, a 12V computer fan, Bosch relay and a wall wart, triggered by the 12V jack on a Denon receiver. Still working after 13 years.
I got the duct from the HVAC guys- it was scrap from what they were doing.
Sounds about what I want to do. Thanks for the input