There was plenty of research done on this years ago (70's-80's maybe). And there is plenty to be said for it. We ran thousands of taps this way. the plus side is if you have a good run, this system will gain yo more sap. But, if you have a year with weeping runs, it will impede your yield because you don't get enough sap in the lines to get them moving and they vaporlock. This was my experience from many years of trying. Pumped vacuum is where it is at. Not saying not to try it, just saying don't think it is going to be like pumped vacuum.
shrunken producer, from 8,000 taps to 4,000 to 5800 to 9500 to 11,000 vac
5x16 woodchip fired evaporator with 5x10 max flue and 5x6 revolution front pan
CDL 20+ RO
Double 10"filterpress
sp-11, bb2, airtech L63, L160, L230 vac pumps
CDL low profile electric releaser
MES 8000 electric releaser
CDL 4000 tap mechanical releaser