Bumping this since found this thread looking for a solution.
Have a reasonably similar setup, on my server (me and a few friends) we try to enforce fair and reasonable and restricted use of chunk loading to reduce server lag when we aren't playing and reduce the risk of automation running wild and corrupting/crashing chunks.
I know a chunk loader would solve my issues in part. I'm just curious if anyone knows if it's something in particular that is causing the Boilers to stay loaded and keep running and just about nothing else. Mostly because if possible we would want to reduce or avoid having to use chunkloaders when players are not online and just be able to log off and call it a night with everything off without needing to fully turn off the server.
But ya, spending the first hour or so whenever I comeback reheating up boilers really sucks.
Current setup, Steve carts tree farm, feeding into Pneumatic/RP2 network that gets it all sorted into biomass and charcoal. Biomass/Biofuel travels between tanks/stills/fermenters using Liquiducts. Nothing too fancy, relays, filters, a sorting machine. One solid and one Liquid fueled boiler, both in different but relatively close chunks. When it's all chunk loaded it should be able to run for at least a day or 2 easily without coming close to running out of fuel, but if I log off with no chunk loaders, the boilers are the only thing still working and consuming fuel till they run dry.