Humidity problems for large tank

[Delphinus]

If you're having a contractor do the plumbing anyhow, get a hot water line. Might as well - you'll wash your hands and stuff probably at the sink anyhow right? Also, RO/DI works better with warm water than it does with cold water. I don't know if this is true for everyone but in the winter my coldwater comes in at only a few degrees above freezing - well - maybe 8 to 10 degrees - that is, as they say, DANG cold and it does impact how much throughput you can get out out of your RO/DI.

If you're doing a whole room anyhow, I'd get way more than just 2 power circuits. I've considered putting a whole subpanel in the room but I haven't decided if I'll do that. But 2, you'll load those up in no time IMO. I'd go 4-6 or maybe even 8 or 10. What the heck, you don't have to use them if you don't need them but it will be nice to have them available "just in case."