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Dishwasher
Bathroom Sink
Utility Sink
Kitchen Sink
Washing Machine
Shower *
Bath Tub
0.5 - 1.0 GPM
0.5 - 1.5 GPM
1.5 - 2.0 GPM
2.0 - 2.5 GPM
1.5 - 2.0 GPM
1.5 - 2.5 GPM
2.5 - 4.0 GPM
GPM (Gallons per Minute Calculation Chart)
Determine the flow rate (GPM) of 105°F Hot Water provided by the Hubbell Tankless
Electric Water Heater. Based upon 240V
110-2 145-2 165-2 180-2 220-3 240-3 280-3
40˚F
45˚F
50˚F
55˚F
60˚F
65˚F
70˚F
75˚F
80˚F
85˚F
90˚F
11kW
1.2
1.3
1.4
1.5
1.7
1.9
2.1
2.5
3.0
3.8
5.0
14kW
1.5
1.6
1.7
1.9
2.1
2.4
2.7
3.2
3.8
4.8
6.4
Cold Water
Inlet Temp F
16kW
1.7
1.8
2.0
2.2
2.4
2.7
3.1
3.6
4.4
5.5
7.3
18kW
1.9
2.0
2.2
2.5
2.7
3.1
3.5
4.1
4.9
6.1
8.2
21kW
2.2
2.4
2.6
2.9
3.2
3.6
4.1
4.8
5.7
7.2
9.6
24kW
2.5
2.7
3.0
3.3
3.6
4.1
4.7
5.5
6.6
8.2
10.9
27kW
2.8
3.1
3.3
3.7
4.1
4.6
5.3
6.1
7.4
9.2
12.3
Hubbell 200 Series
Dimensions: 17” x 16” x 3”
Weight: 23 lbs.
Model 280-3 27 kW
Model 240-3 24 kW
Model 220-3 21 kW
Three Models to choose from
Hubbell 100 Series
Dimensions: 13.5” x 16” x 3”
Weight: 19 lbs.
Model 180-2 18 kW
Model 165-2 16 kW
Model 145-2 14 kW
Model 110-2 11 kW
Four Models to choose from
The Hubbell 100 series
Tankless electric water
heater
offers 2 element heating and is perfect
for homes in the southern part of the country.
The Hubbell 200 series
Tankless electric water
heater
offers 3 element heating and is perfect
for homes in the northern part of the country.
*If simultaneous operation of multiple showers is absolutely necessary, two units may be needed. Installation of two
units will likely require electrical service upgrade to the home.
Total Fixture
Flow Rate
(GPM)
Residential
Demand Factor
(0.30)
=
Instantaneous Demand
(GPM)
Example
At 40°F cold water and 2.7 GPM select Model 280-3
At 70°F cold water and 2.7 GPM select Model 145-2
MODEL SELECTIONS:
➤
Dishwasher 1 x 0.5 = 0.5
Washing Machine 1 x 2.0 = 2.0
Bathroom Sink 2 x 0.5 = 1.0
Kitchen Sink 1 x 1.5 = 1.5
Shower 2 x 2.0 = 4.0
Total 9.0
9.0 x 0.30 = 2.7 GPM
+
Minimum Recommended Model Average Cold Water Temp.
Model 280-3 27kW 37 °F 50 °F
Model 240-3 24kW 40 °F 52 °F
Model 220-3 21kW 50 °F 61 °F
Model 180-2 18kW 62 °F 75 °F
Model 165-2 16kW 65 °F 77 °F
Model 145-2 14kW 65 °F 77 °F
Model 110-2 11kW 65 °F 77 °F
Winter Summer
www.buytankless.com
Sizing Formula For Average Household
Visit www.buytankless.com for current pricing and technical specifications or call 1-877-649-8589
x
Flow Rate Chart Typical Hot Water Flow Rates