Okay, so starting with climate control in the room; I run a water chilling system that handles my whole op, soup to nuts- and heats my home all winter (in Colorado!), as a bonus. This bonus alone pays for the chiller in three winters, not counting its performance advantage over AC.
The unit is a ChillKing 2 Ton window mount, from the outside it looks and sounds exactly like the 24k BTu Frigidaire windowbanger it's based on. The only difference is that it makes water cold instead of air. So where does that water go to do its business?
One destination is the cooling coil in every RDWC system in the house. The chillers are set to cool water to 59f, which in practice means RDWC will run between 63 and 66 at the end of its day cycle, no thermostatic switch required.
The other destination is an 8" Icebox air to water heat exchange core, with an 8" Canfan blowing air down through it and then down a short length of 8" rigid ducting, to aim the precipitation down at a catchment bucket for recycling into the RDWC system. The fan runs when my Sentinel CHHC-4 wants temps down.
Humidity is controlled AUTOMATICALLY, by the chiller. The environmental controller does not manage humidity, only temps and CO². How this happens is via the concept of dewpoint. My Icebox core remains at the temperature set by the chiller, which then creates within the core a place where the air cannot hold more than 100% of its RH at that 60f mark. Yet, the rest of the room is in the 80s. The result is that the Icebox maintains humidity between 65-75% RH, and the excess moisture rains- seriously- down the ductwork and back into my RDWC.
Letting the implications sink in for a moment, this means that no longer is a large, bulky and expensive room heater called a 'dehumidifier' required to maintain climate control. The fact that a dehuey is no longer required accounts for a substantial part of the increased efficiency of water chilling vs AC... but not all of it. Next time you mentally price a water chiller vs an AC unit, don't forget to price and add a dehuey too. Suddenly makes water chilling look a whole lot more affordable, huh? One of the stated reasons why I got booted from the other site was that I advocate for water chilling to much. Point taken, so listen carefully, as my opinion has changed on this matter; in the 21st Century, modern indoor growers will interestingly use water chilling, due to its economical and environmental control advantages over AC. Or to be blunt; AC IS DEAD FOR INDOOR GROWING. I'm no more wrong about this than people were wrong for advocating an increase in growroom RH just a few years ago. Once that was a radical idea; now VPD theory is common sense. Chilling will replace AC- and I'll bet it will eventually disappear from homes and businesses, too.