When our tumble dryer is on (condenser dryer), the temperature in the utility room increases by several degrees, and the humidity decreases. I need to create an object in Cortex that represents the tumble dryer and that, if true, will switch on the fan.

I also have a temperature and humidity sensor in the kitchen, so I suspect a good way to do this would be that if the temperature in the utility room is more than 2 degrees higher than that in the kitchen, then it's true and I can use that to switch on the fan.

Could someone point me in the right direction?