Specification

3 Smart Steps For Endless Hot Water
1
The EcoSmart tankless
water heater you choose
depends on your climate.
Refer to this chart to find
out which model best
suits your needs.
37˚F
42˚F
47˚F
52˚F
57˚F
62˚F
67˚F
72˚F
77˚F
3
Check dimensions and electrical specifications in the chart below.
POU 3.5
POU 6
ECO 8
ECO 11
ECO 18
ECO 24
ECO 27
ECO 36
Model Number kW Volts
Required Max Power Required
Dimensions Weight
Breaker
(
AMP
)
Wire
3.5 120 30 29 10 7ʺ x 11ʺ x 3ʺ 4 lbs.
6 208 30 29 10 7ʺ x 11ʺ x 3ʺ 4 lbs.
8 240 40 33 8 12ʺ x 9.75ʺ x 3.75ʺ 4.75 lbs.
13 240 60 57 (2) 6 12ʺ x 9.75ʺ x 3.75ʺ 6.5 lbs.
18 240 (2) 40 75 (2) 8 18ʺ x 14ʺ x 3.75ʺ 11.25 lbs.
24 240 (3) 40 100 (3) 8 18ʺ x 17ʺ x 3.75ʺ 13.75 lbs.
27 240 (3) 40 112.5 (3) 8 18ʺ x 17ʺ x 3.75ʺ 13.75 lbs.
36 240 (4) 40 150 (4) 8 17ʺ x 19ʺ x 3.75ʺ 17.4 lbs.
2
Match your location on the map, shown above, to the corresponding chart below to determine unit capacity.
Results based on outlet
temperature of 105°F.
Represents a hand sink
faucet opened full with
a flow of ½ GPM
Represents a water-
saver shower open
full with 1½ GPM
POU 6 0.6
ECO 8 0.8
ECO 11 1.3
ECO 18 1.8
ECO 24 2.4
ECO 27 2.7
ECO 36 3.6
Inlet Temp: 37°F
Model GPM Approx. Usage
POU 6 0.8
ECO 8 1.0
ECO 11 1.7
ECO 18 2.3
ECO 24 3.1
ECO 27 3.5
ECO 36 4.6
Inlet Temp: 52°F
Model GPM Approx. Usage
POU 6 0.7
ECO 8 0.9
ECO 11 1.4
ECO 18 2.0
ECO 24 2.6
ECO 27 2.9
ECO 36 3.9
Inlet Temp: 42°F
Model GPM Approx. Usage
POU 3.5 0.7
POU 6 1.2
ECO 8 1.7
ECO 11 2.7
ECO 18 3.7
ECO 24 5.0
ECO 27 5.6
ECO 36 7.5
Inlet Temp: 72°F
Model GPM Approx. Usage
POU 6 0.7
ECO 8 0.9
ECO 11 1.5
ECO 18 2.1
ECO 24 2.8
ECO 27 3.2
ECO 36 4.2
Inlet Temp: 47°F
Model GPM Approx. Usage
POU 3.5 0.6
POU 6 1.0
ECO 8 1.3
ECO 11 2.1
ECO 18 2.9
ECO 24 3.8
ECO 27 4.3
ECO 36 5.7
Inlet Temp: 62°F
Model GPM Approx. Usage
Average Gallons Per Minute (GPM)
based on 2010 Plumbing Standards
Applications
Water-Saver
Shower Head
Standard
Shower Head
Standard
Hand Sink
Kitchen Sink
Bath Tub
Dishwasher
Washing Machine
1.5 GPM
2.0 GPM
0.5 GPM
1-2 GPM
≥ 4 GPM
1-2 GPM
1-1.5 GPM
POU 3.5 0.6
POU 6 1.1
ECO 8 1.4
ECO 11 2.3
ECO 18 3.2
ECO 24 4.3
ECO 27 4.9
ECO 36 6.5
Inlet Temp: 67°F
Model GPM Approx. Usage
POU 3.5 0.5
POU 6 0.9
ECO 8 1.1
ECO 11 1.9
ECO 18 2.6
ECO 24 3.4
ECO 27 3.8
ECO 36 5.1
Inlet Temp: 57°F
Model GPM Approx. Usage
POU 3.5 0.9
POU 6 1.5
ECO 8 2.0
ECO 11 3.2
ECO 18 4.4
ECO 24 5.9
ECO 27 6.6
ECO 36 8.8
Inlet Temp: 77°F
Model GPM Approx. Usage