Im gonna set up a 20k watt unducted setup. Instead of using air cooled lights im just gona be using a 5 ton a/c also using co2 in this room btw. Im going to be doing an air exchange 2x during the day and 2x at night. Im wondering if i just use my carbon filter to exchange the air, and not have it run during any other times of the day because there is no air escaping? Also do i need to bring fresh air into the room after its exhausted, or does that beat the whole purpose of a sealed room?I guess im just having a hard time understanding exactly what a sealed room is defined as. Its hard for me to wrap my head around the concept of exhausting air 4 times a day and bringing nothing else in the room except the co2 thats being generated. Simple questions, but id appreciate your help