INKBIRD WiFi 6” Inline Duct Fan. Inline duct fan function: increases airflow and heat dissipation, achieves We can run the fan however we want. The fan speed is variable from 0 to 10. efficient Motor.
eBay
Still has a ton of life left. Includes mounting brackets and 8 foot pre-wired 120V cord. Brushless thermally protected AC motors with sealed for life bearings (will not require any lubrication). Save money and buy used!
eBay