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.
11 240 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 sink faucet
opened half way with
a flow of ¼ GPM
Represents a water-
saver shower open
full with 1½ GPM
POU 3.5 0.35
POU 6 0.60
ECO 8 0.80
ECO 11 1.10
ECO 18 1.81
ECO 24 2.41
ECO 27 2.71
ECO 36 3.62
Inlet Temp: 37°F
Model GPM Approx. Usage
POU 3.5 0.45
POU 6 0.77
ECO 8 1.03
ECO 11 1.42
ECO 18 2.32
ECO 24 3.09
ECO 27 3.48
ECO 36 4.64
Inlet Temp: 52°F
Model GPM Approx. Usage
POU 3.5 0.38
POU 6 0.65
ECO 8 0.87
ECO 11 1.19
ECO 18 1.95
ECO 24 2.60
ECO 27 2.93
ECO 36 3.90
Inlet Temp: 42°F
Model GPM Approx. Usage
POU 3.5 0.72
POU 6 1.24
ECO 8 1.66
ECO 11 2.28
ECO 18 3.73
ECO 24 4.97
ECO 27 5.59
ECO 36 7.45
Inlet Temp: 72°F
Model GPM Approx. Usage
POU 3.5 0.41
POU 6 0.71
ECO 8 0.94
ECO 11 1.30
ECO 18 2.12
ECO 24 2.83
ECO 27 3.18
ECO 36 4.24
Inlet Temp: 47°F
Model GPM Approx. Usage
POU 3.5 0.56
POU 6 0.95
ECO 8 1.27
ECO 11 1.75
ECO 18 2.86
ECO 24 3.81
ECO 27 4.29
ECO 36 5.72
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 0.63
POU 6 1.08
ECO 8 1.44
ECO 11 1.98
ECO 18 3.24
ECO 24 4.31
ECO 27 4.85
ECO 36 6.47
Inlet Temp: 67°F
Model GPM Approx. Usage
POU 3.5 0.50
POU 6 0.85
ECO 8 1.14
ECO 11 1.57
ECO 18 2.56
ECO 24 3.42
ECO 27 3.84
ECO 36 5.12
Inlet Temp: 57°F
Model GPM Approx. Usage
POU 3.5 0.85
POU 6 1.46
ECO 8 1.95
ECO 11 2.68
ECO 18 4.39
ECO 24 5.85
ECO 27 6.59
ECO 36 8.78
Inlet Temp: 77°F
Model GPM Approx. Usage