Setting up a sealed room myself, or semi sealed. I’m in about 10x8 space 2-1kDE and 2-315cmh.
will be running tanks, looking for a used 2 burner or 4 burner generator in the future, but I got a smokin deal on the controller/regulator/tank and I can likely resell it when I find a good burner.
Do not underestimate the need to cycle air periodically. I have an exhaust fan and makeup air fan that will run 5 minutes every 4 or 6 hours. Outside air comes through a louver that has a 4” thick furnace filter installed in a filter rack, exhaust is run through a carbon filter and exhausted out.
good controllers, fail safe controls and alarms are a good idea, especially if it is adjoining a living space. For example co2 alarm goes off and room exhausts, therefore not killing you. OP is in an out building so that islikely not an issue.
I’ll likely get a mini split soon, but I’ll be running a modified portable AC in the meantime. Not the best, but I have 3 of them that have been given to me over the years and I’ll make it work. I’ll likely only need a 1 ton split, but if my load were larger I would definitely consider multiple systems vs a 2 zone, again think of everything that possibly could go wrong and build fail safes in place.
VERY IMPORTANT - Make sure that the split system will operate in low temps, some will not. That would suck in Michigan
humidifier and dehumidifier on controls, easy enough
watch VPD
READ
DONT LISTEN TO RANDOM PEOPLE ON THE INTERNET
If there’s anything worth doing, it’s worth doing right.