Thermostat internal relay

Is there a procedure to have a thermostats internal relay action of turning on the A/C, Heat & Fan be used as an event to turn on other devices ?

I have several zoned areas each with their own T-Stats that I would like to be able to turn on ceiling fans at a preset level in those areas in response to the cooling cycle.
Or to turn on an outlet for a heated blanket during winter and the Heating cycle.
Any ideas?

JOD.