I stopped by with my grandson on Saturday to see how Dino was doing He planned to boil 255 Gallons and was hoping to yield 5.5 or so gallons. He has a bunch of energy and hand carries all of it to where he boils. Dino told me that he burned about a half of cord of hardwood to boil his first batch. Very interesting process. While we were there we measured the big oak that was in another post. Based on measurements and the growth factor of oak , We came up with about 235 years old