Welcome to Beals & Bob's. We are here to help you find replacement oil fired and propane heater parts. We have several parts available for online ordering, if you can't find the part you are needing you can fill out the PARTS FORM and we will get back to you with the price and availability. Heater is best operated on K1 kerosene, but per the manual, it is also capable of operating on #1 heating oil, or #1 diesel. (Albeit with more soot and a stronger odor.)The OK:- Temp control knob is graduated in 10 degree increments.