Really want to save some gas money you may have to check the followings: ' B0 S' K9 E1 h1 @* h- F1. The thermostat settings. Set the temperature as low as you still feel ok. say 16 degree? - Q6 Y; n/ f% H- f2. Close the vents near the entrance door and garage door, vents in the bathrooms. 5 S" B3 A- e' n6 f @/ [, B3. Check the on/off cycle of the furnace, and flame of the furnace to make sure the furnace burns efficiently . ( need a professional people to look after)