ZigBee 24vdc fan controller

I'm looking for a smart DC fan controller to drive a 24vdc blower fan for my smoker..

There's plenty of on/off relays and physical dial boards that I can find but I want to be able to have HASS vary the speed based on a separate ZigBee temperature sensor.

Anyone have any ideas?

No-one seems to have asked this question before... They all seem to be ceiling fan related... :/