RO/DI hooked up to cold AND hot supply

[The Codfather]

Originally Posted by mike31154

There's a trade off to the better production ratio eh? IMO, save yourself the hassle. Not only are you using more energy for a bit or warm water, but the rejection rate with warmer water is worse, so you'll burn thru DI media faster.

The temp of the water here entering the house is right around 4C, so it does improve production quite a bit by increasing the temp. I have a zero waste, so i have no reject water, so i guess pending on your situation and your water quality to start with, it does make a difference.