Cold Weather RO Production

acroholic

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Guys,
Remember that RO production is not as great as the temperature of the source water drops. So if you see a drop in the amount of water you make, it is not necessarily your prefilter, carbon block, or your RO Membrane. From an RO industry source:

Temperature’s effect on membrane production

Water temperature plays a vital role in understanding point-of-use (POU) reverse osmosis (RO) production expectations and actual permeate results.

An increase in water temperature is the result of accelerated activity at the molecular level. As heat transfers into an object, the molecules oscillate, or shake, at ever-increasing rates.

As water temperature decreases, the rate of molecular oscillation decreases, and water undergoes an increase in viscosity, resulting in a slower membrane production rate.

Two RO systems operating under identical conditions — with the exception of a higher influent water temperature for the first system — may produce 1.5 gallons per hour (gph) and 0.5 gph, respectively.
 
yes, good pointing out....I keep mine in the garage, and I notice that, too! I have to change my filters more often spring and summer, and the water itself seems less prone to bacteria (albeit, I have no clue) in winter.
 
I use 25' of poly tube in a 7 gal bucket with a heater in the winter to help with the temp issue.
 
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