I have a 82.7% oil furnace with a .70 nozzle and 2 ton hp system. We run the hp until 30f outside, use approx. 400 gallons of oil a season. We live in ne ohio the house was built in the late 60's about 1800 sf ranch. Fuel oil has been running about $4 a gallon and propane $2.17. Was wondering if anyone else has switched and what their results were or if it is worth it to go to a 95% propane 2 stage or mod. furnace. Thanks.