My chiller is a window mount unit, and one pump circulat".....es all the water in my cooling circuit- which is not nutrient water but a separate system with its own cold water storage reservoir. That cooling circuit services every component that removes heat from water or air in a grow space, and it also services the chiller- which of course removes heat from the water. Incidentally, the chiller is not only far away from the bloom room, it's on a different floor!
What's more, the chiller sits inside my office all winter, allowing the heat it rejects to heat my home. Completely, without additional assistance. This will be the fourth winter I haven't used my gas forced air furnace.
But wait- It gets BETTER! I built a compressorless chiller to take advantage of cold winter outside temperatures to cool the water in my cooling system. The same pump circulates water through it, I just hooked it up to the same system. My best guess is that it produces the equivalent of about three Tons of chilling when the outside temperature is at freezing.
How's that for SCIENCE, Bitch?!