My house is 3 years old, the 2nd floor has an open loft living area as well as a closed bedroom and bathroom. The bedroom has the 2nd thermostat the other is in the hall downstairs. The heat from downstairs rises and the unit is always running to reach temperature downstairs, upstairs even if I do not have the heat on it is warmer than the first floor. How can I stop the heat loss downstairs, we only use the 2nd floor when company comes which isn't too often. The loft is open on 2 sides and there is a large staircase which leads to the 2nd floor.
My heating bills are very high, I can't even lower the heat at night since it takes hours for the unit to reach the desired temp.