High Efficiency RO/DI Systems

[mike31154]

I used to coil a long section of the input tubing in a bucket warmed with a heater but found gain in production speed negligible using this method. Mentioned something along this line in one of my earlier posts, but might bear repeating - I've found my 75 gpd membrane takes the 210+ TDS tap water at 8 degrees C down to 0 TDS during the colder months. In the summer, once the water temp rises to 12-16 C thru the system, the best I get is 1 TDS after the membrane. Haven't had to replace the DI & I'm going on better than 2 years. Been keeping a record of throughput on an Excel spreadsheet since day 1 (April 2009) & so far have produced 322 gals RO & 1610 gals RODI. Sneaking up on 2000 gals total. I guess I prefer waiting a little longer for the water than speed it up with warmer water and lose TDS efficiency through the membrane.