MEMBRANE LIFE
21
Rev C
The Merlin Advantage
Since the Merlin requires no storage tank, its membrane element performs
at the optimal recovery rate at all times. This makes the Merlin’s efficiency
the same as the Merlin’s recovery. Because of this, the Merlin sends
significantly less waste water to the drain than tradional home RO
systems with a tank.
This is a huge advantage in areas where water conservation is critical.
Figure 12 Merlin vs. RO Efficiency with Three Gallon Tank
The Proof Is In The Numbers
Below is a waste water calculation to show the amount of waste water
produced to make 3 gallons of permeate water.
Which system is better for the environment?
Consider that the average consumer is using only 8-12 oz. of water at a
time. An RO system with a storage tank generally is operating under 10%
efficiency!
Table 3
Standard Home RO
Merlin RO
Gallon 1
1 gallon of permeate water @
20% efficiency =
4 gallons of water to drain
1 gallon permeate @ 25%
efficiency =
3 gallons to drain
Gallon 2
1 gallon of permeate water at
10% efficiency =
9 gallons of water to drain
1 gallon permeate @ 25%
efficiency =
3 gallons to drain
Gallon 3
1 gallon of permeate water @
5% efficiency =
19 gallons of water to drain
1 gallon permeate @ 25%
efficiency =
3 gallons to drain
Results
32 total gallons of water to drain 9 total gallons to drain
1 2 3 4 5 6 7
(3.8) (7.6) (11.4) (15.1) (18.9) (22.7) (26.5)
30
25
20
15
10
5
Gallons (Liters) of Permeate Water Produced
% Efficiency
Tank is Full
Merlin RO System
RO System
With Storage Tank
Tank is Empty
