I may not be understanding the situation completely, wouldn't be the first time. But why not move the stat that controls the area of the house that is getting cold away from the other stat?
Maybe to a bedroom where the door can be shut to isolate the stat from the area controlled by the first stat?
Kevin
I'm thinking the two boilers have their own ductwork? If so, linking the two boilers to same stat won't help....
The house was built as as side by side duplex. Each boiler is plumbed to heat 1/2 of the house and isn't large enough to heat the entire house. I could move one thermostat to a hall way on one side, but I would rather only have one thermostat if I can. Moving the thermostats in this house would be a royal pain. The central AC is also ran off one of these thermostats. it would need to stay centrally located.
