you have to stop taking everything i say as a suggestion. you are nowhere near large enough to need an air handler. i was just sharing some cool applications with you. you don't need to vent your hoods out of the room either with an 18,000-24,000btu minisplit. if you are going to keep them in the air cooled hoods then you should at least vent the hoods into the room. that heat trapped in the hood will reduce bulb life and make your a/c work harder to keep up because you will have higher temps under the hood than normal. if you wanna go bare bulb then just get some batwing reflectors. they are super cheap anyway.
don't get an environmental controller in my opinion. most of them aren't designed for the motor loads that a/c units and dehumidifiers have. plus, you won't be able to hook up a minisplit to it. better off just getting a controller for your Co2 and that's it. the a/c will have it's own thermostat and the dehumidifier will have it's own hygrometer. if anything, i would still go with the 4 600's. they are more efficient than 1000's and will give you more options as far as plant footprint design. plus you could do 2 on each side and just offset them by 1 month. that way you get a harvest every month instead of every 2 months. if you go with 2 1000's then you won't need a 2 ton a/c. probably only a 1.5 ton. maybe even only a 1 ton. you could get the 2 ton if you plan on going bigger in the future. get dial-a-watt ballasts and use them at 1000w for now. if you decide to go bigger in the future you just get 2
more and dial them all to 600w and pick up some 600w bulbs.
