I understand too, in fact I recently only had 225 gal of 2% sap to boil and I didn't even use the RO. I also didn't run the H.P AOF/AUF, I just opened the draft door and listened, and enjoyed the time. It was so quite, both the RO and the HP blower are loud.
Now I don't plan to do that when I have a lot of sap, but it was relaxing and reminiscent of simpler times. I did still use the auto draw, which is more relaxing than monitoring the temp all the time.
Dave Klish, I recently ordered a 2x6 wood fired evaporator from A&A Sheet Metal which I will be converting to oil fired
Now have solar, 2x6 finish pan, 5 bank 7x7 filter press, large water jacketed bottler, and tankless water heater.
Recently bought another Gingerich RO, this one was a 125, but a second membrane was added thus is a 250, like I had.
After running a 2x3, a 2x6, 3x8 tapping from 79 taps up to 1320 all woodfired, now I'm going to a 2x6 oil fired and a 200-425 taps.