What's best brand mini split,and what size?

Going in a 11'x12' with 4K watts, and co2 burner, and what's some good companies to go through. Also Is it possible to run central air in a unsealed veg room? would the air being pulled in from the central air be enough for fresh air?

deff buy a good one if you do go that route a 2 ton can handel 4 1000 hps any more than that and you will
need a bigger one i have 2-2ton minis in my 6k sealed room and i can drop it to 64 no glass in hoods
and no ducting to hoods keep in mind the line set that needs to be ran to the unit also its not discrete
as for the veg room ya you can run ac in there if you have a cold air return it might smell tje house up but
it will have enough fresh air with some fans going

What brand mini's u running? My lights are air cooled, so a 2 ton should work right? What ya mean about cold air return? I was just gonna run the central air to veg room only and use a carbon filter for smell. Do I need to ventilate air out too?

I just bought a Daiken 18,000 btu with heat pump. I got it at wholesale. It was a bit more than the chinese ones but its quality. 2 year warranty on parts, 7 year on compressor.

im running haier brand they work good but there not the best brand cost me 3800 for 2 2ton units with heat pump installed have them in a 16x12 flwer room and i can drop it to 60 if i want by far better than central air if you can float it i was saying if you had a cold air return duct in your veg room it might smell ur house up because thats the air your furnace uses for central air