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by walterbell 1344 days ago
Terra Bloom has 4/6/8" EC duct fans that can be controlled by wired/wireless remotes and DIY MCU/RPi via PWM, including a tachometer readout of actual fan speed, https://terra-bloom.com/blogs/news/how-to-choose-a-fan-speed... & https://github.com/albahmed23/terrabloom_ec_fans.