Because of a disability I have in my hands I got the wanderer for 1500 bucks or so, it is very good for wet trimming and doesn't knock off a shit ton of trichomes, it made quick work, and I was happy with it. You need to clean it often, but it cleans easily, and saved me a bunch of time. That...
one way would be to set the intake fan on a timer, say 4 air exchanges an hour, you could get a Normally open/normal closed timer (Grasslin DTMV), that way you could time the co2 injection via an inline air solenoid. When the circulating fan turns on for a few minutes, the co2 solenoid shuts off...
there are several that are made equally, basically take your pick, To use a plc is good, you can buy them cheaply. the best way to save money is to have the unit powered through a variable Frequency drive(VFD) it controls the hertz and can slow down or speed up a compressor depending on load...
Wanted to introduce myself, howdy all. Indoor/outdoor grower, love the plant and the people that grow it. Bunch of my friends just joined, so here I am, a dankden refugee. Once I learn how to use this site, Ill post vids and pics,