I have installed an add on corn furnace to an existing oil fired forced air furnace. I would
Like to control the fan on the oil furnace with the thermostat of the corn furnace. Oil furnace is 24volt 4 wire. The corn furnace is millivolt (I believe) 2 wire. What I'm looking for is to have the oil furnace fan run when the corn furnace is calling for heat. Also not disrupting the normal operation of the oil furnace. The oil furnace uses a honeywell fan
Limit/control on it if this helps.
Thanks