I've looked through the Shelly relays and the only one that mentions fans is the RGBW2.
I want to control an inline duct fan based on season, temperature, and HVAC status, however for the sake of quietness, I plan on buying a fan too-large and then slowing it down.
Many fans indicate that they have two or three speeds, and many show that they can be adjusted infinitely with another device such as the Vari-Speed controller.
Is the RGBW2 capable of controlling speed in the same way as a 3-speed or infinite speed controller? If not, is it able to control the controller? E.g. if I purchased a Vari-Speed, could the Shelly relay tell the Vari-Speed what speed to run at?
