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.

[The Codfather]

M, do you have a booster pump? Or do you run on line pressure? I guess depending on what your requirments are, maybe youd be farther ahead by adding a booster pump instead of blending your water for better production.
If you go the cheap route on a blended control, it is not very accurate, also depending how you distribution piping is done, you may find that there is a large pressure difference between the hot and cold. There are a few factors to consider, id boost before i blend. I have access to the equipment through work, thats why i went cadillac on my system. Just my 2cents.