In our ranch house built in 1950 we want to add a pellet stove in the living room. I'm concerned that the heat from the stove will prevent the furnace from kicking on to heat the basement (full size, finished). The thremostat is on the wall just outside of the living room facing the dining room/kitchen. We are on a shared well and our basement houses the pressure tank and I'd hate to have freezing pipes that prevent not only us but our neighbors from having water.

Without adding a 2nd pellet stove to the basement or turning the thermostat to 80 what are the options?

The winters here can get in the teens or twenties below zero with wind chills at -40 or so. If the power fails we have no furnace, natural gas is expensive but pellets are cheap so we are leaning toward a pellet stove as supplimental heat as well as emergency heat.