I'm being tempted to put a stove insert in the fireplace in my living room. The problem is that the house is a ranch, and the living room is at the far end from the bedrooms. The thermostat is in the front hall, directly outside the living room and separated only by a double wide opening (with no doors). A stove will do a great job of heating the living room, dining room, and possibly the kitchen ... but I'm concerned that the heat that gets into the hall will tell the thermostat no heat is needed. That will mean no heat for the bedrooms or bathrooms.
The house doesn't have central air, so the thermostat is a simple, 2-wire, heat-only thermostat. Would it be possible to install a second thermostat, at the opposite end of the hall, and wire it in parallel with the first one so the boiler will come on regardless of which one is calling for heat?