Really want to save some gas money you may have to check the followings: $ Y, o% N2 z' J n. s/ k1. The thermostat settings. Set the temperature as low as you still feel ok. say 16 degree? * |. N7 {5 X# \& T* z' C U2. Close the vents near the entrance door and garage door, vents in the bathrooms. 3 o9 s4 K1 z+ c, u9 g3. 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)