I have an american standard (trane) freedom 95 single stage- model AUH1B080A9421AA. I am getting an air purification system put in and it will work better of course if the furnace fan runs all the time. From what I understand this model of furnace has a 4 speed blower motor. Currently with the thermostat I can have the fan run all the time but it is on the same speed as when the heat is on and I would like to know if it is possible to have the motor run 24/7 on low and when it needs to kick in for heating then run on high or med high as it is now? Is it a matter of getting a better thermostat? Is it even possible?
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