Would one be able to keep temps stable at or below 85 F in 2 separate 4x4 flowering chambers each with a 1000w HPS if the room temps outside the tents are 75 F? Or Would it be easier to maintain lower temps having the rooms conjoined in a 4x8 single flowering chamber?
Probably not.. Unless you have sealed reflector with at least 450cfm inline fan and exhaust reflector's air and grow room air outside of the room where your tent is located, then you can probably keep temperature in low-mid 80's...