Tankless Gas Water Heater Reviews (5-6 GPM)

Tankless Gas Water Heater Reviews
Ratings Guide
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Better
Good
Fair
Poor
Go To: Tankless Gas 5-6 GPM | 7-8 GPM | 9 GPM | 10 GPM | 11-19 GPM

A O Smith
ATI-110-N

Type: 6.6 GPM Tankless
Fuel: Natural Gas
Flow: 3 GPM (77* Rise)
Nominal Price: $700
Energy

0.82

Factor
Utility Cost

$247

National Avg
Warranty

15

Yrs Tank/HE
Warranty

5

Yrs Parts
Unit Cost

$106

Per GPM
Vent

Power

Type
10 Yr Cost

$4200

Install+Utilities
A O Smith
ATI-110U-N

Type: 6.6 GPM Tankless
Fuel: Natural Gas
Flow: 3 GPM (77* Rise)
Nominal Price: $700
Energy

0.82

Factor
Utility Cost

$247

National Avg
Warranty

12

Yrs Tank/HE
Warranty

5

Yrs Parts
Unit Cost

$106

Per GPM
Vent

Power

Type
10 Yr Cost

$4200

Install+Utilities
A O Smith
ATI-140H-N

Type: 6.6 GPM Tankless
Fuel: Natural Gas Condensing
Flow: 2.9 GPM (77* Rise)
Nominal Price: $900
Energy

0.93

Factor
Utility Cost

$217

National Avg
Warranty

15

Yrs Tank/HE
Warranty

5

Yrs Parts
Unit Cost

$136

Per GPM
Vent

PowerD

Type
10 Yr Cost

$4100

Install+Utilities
A O Smith
ATI-240H-N

Type: 6.6 GPM Tankless
Fuel: Natural Gas Condensing
Flow: 4 GPM (77* Rise)
Nominal Price: $1100
Energy

0.95

Factor
Utility Cost

$213

National Avg
Warranty

15

Yrs Tank/HE
Warranty

5

Yrs Parts
Unit Cost

$167

Per GPM
Vent

PowerD

Type
10 Yr Cost

$4200

Install+Utilities
A O Smith
ATO-110-N

Type: 6.6 GPM Tankless
Fuel: Natural Gas
Flow: 3 GPM (77* Rise)
Nominal Price: $700
Energy

0.82

Factor
Utility Cost

$247

National Avg
Warranty

15

Yrs Tank/HE
Warranty

5

Yrs Parts
Unit Cost

$106

Per GPM
Vent

Power

Type
10 Yr Cost

$4200

Install+Utilities
A O Smith
ATO-110U-N

Type: 6.6 GPM Tankless
Fuel: Natural Gas
Flow: 3 GPM (77* Rise)
Nominal Price: $700
Energy

0.82

Factor
Utility Cost

$247

National Avg
Warranty

12

Yrs Tank/HE
Warranty

5

Yrs Parts
Unit Cost

$106

Per GPM
Vent

Power

Type
10 Yr Cost

$4200

Install+Utilities
A O Smith
ATO-140H-N

Type: 6.6 GPM Tankless
Fuel: Natural Gas Condensing
Flow: 2.9 GPM (77* Rise)
Nominal Price: $900
Energy

0.93

Factor
Utility Cost

$217

National Avg
Warranty

15

Yrs Tank/HE
Warranty

5

Yrs Parts
Unit Cost

$136

Per GPM
Vent

PowerD

Type
10 Yr Cost

$4100

Install+Utilities
A O Smith
ATO-240H-N

Type: 6.6 GPM Tankless
Fuel: Natural Gas Condensing
Flow: 4 GPM (77* Rise)
Nominal Price: $1100
Energy

0.95

Factor
Utility Cost

$213

National Avg
Warranty

15

Yrs Tank/HE
Warranty

5

Yrs Parts
Unit Cost

$167

Per GPM
Vent

PowerD

Type
10 Yr Cost

$4200

Install+Utilities
American
GT-110-NE

Type: 6.6 GPM Tankless
Fuel: Natural Gas
Flow: 3 GPM (77* Rise)
Nominal Price: $800
Energy

0.82

Factor
Utility Cost

$247

National Avg
Warranty

15

Yrs Tank/HE
Warranty

5

Yrs Parts
Unit Cost

$121

Per GPM
Vent

Power

Type
10 Yr Cost

$4300

Install+Utilities
American
GT-110-NI

Type: 6.6 GPM Tankless
Fuel: Natural Gas
Flow: 3 GPM (77* Rise)
Nominal Price: $800
Energy

0.82

Factor
Utility Cost

$247

National Avg
Warranty

15

Yrs Tank/HE
Warranty

5

Yrs Parts
Unit Cost

$121

Per GPM
Vent

Power

Type
10 Yr Cost

$4300

Install+Utilities
American
GT-110-UE

Type: 6.6 GPM Tankless
Fuel: Natural Gas
Flow: 3 GPM (77* Rise)
Nominal Price: $800
Energy

0.82

Factor
Utility Cost

$247

National Avg
Warranty

12

Yrs Tank/HE
Warranty

5

Yrs Parts
Unit Cost

$121

Per GPM
Vent

Power

Type
10 Yr Cost

$4300

Install+Utilities
American
GT-110-UI

Type: 6.6 GPM Tankless
Fuel: Natural Gas
Flow: 3 GPM (77* Rise)
Nominal Price: $800
Energy

0.82

Factor
Utility Cost

$247

National Avg
Warranty

12

Yrs Tank/HE
Warranty

5

Yrs Parts
Unit Cost

$121

Per GPM
Vent

Power

Type
10 Yr Cost

$4300

Install+Utilities
American
GT-140-NEH

Type: 6.6 GPM Tankless
Fuel: Natural Gas Condensing
Flow: 3 GPM (77* Rise)
Nominal Price: $900
Energy

0.93

Factor
Utility Cost

$217

National Avg
Warranty

15

Yrs Tank/HE
Warranty

5

Yrs Parts
Unit Cost

$136

Per GPM
Vent

PowerD

Type
10 Yr Cost

$4100

Install+Utilities
American
GT-140-NIH

Type: 6.6 GPM Tankless
Fuel: Natural Gas Condensing
Flow: 3 GPM (77* Rise)
Nominal Price: $900
Energy

0.93

Factor
Utility Cost

$217

National Avg
Warranty

15

Yrs Tank/HE
Warranty

5

Yrs Parts
Unit Cost

$136

Per GPM
Vent

PowerD

Type
10 Yr Cost

$4100

Install+Utilities
Noritz
NR662-OD-NG

Type: 6.6 GPM Tankless
Fuel: Natural Gas
Flow: 3.2 GPM (77* Rise)
Nominal Price: $700
Energy

0.85

Factor
Utility Cost

$238

National Avg
Warranty

12

Yrs Tank/HE
Warranty

5

Yrs Parts
Unit Cost

$106

Per GPM
Vent

Power

Type
10 Yr Cost

$4100

Install+Utilities
Noritz
NRC661A-DV-NG

Type: 6.6 GPM Tankless
Fuel: Natural Gas Condensing
Flow: 3 GPM (77* Rise)
Nominal Price: $900
Energy

0.95

Factor
Utility Cost

$213

National Avg
Warranty

12

Yrs Tank/HE
Warranty

5

Yrs Parts
Unit Cost

$136

Per GPM
Vent

Direct

Type
10 Yr Cost

$4000

Install+Utilities
Noritz
NRC661A-OD-NG

Type: 6.6 GPM Tankless
Fuel: Natural Gas Condensing
Flow: 3 GPM (77* Rise)
Nominal Price: $900
Energy

0.95

Factor
Utility Cost

$213

National Avg
Warranty

12

Yrs Tank/HE
Warranty

5

Yrs Parts
Unit Cost

$136

Per GPM
Vent

Power

Type
10 Yr Cost

$4000

Install+Utilities
Noritz
NRC661-DV-NG

Type: 6.6 GPM Tankless
Fuel: Natural Gas Condensing
Flow: 3 GPM (77* Rise)
Nominal Price: $900
Energy

0.91

Factor
Utility Cost

$222

National Avg
Warranty

12

Yrs Tank/HE
Warranty

5

Yrs Parts
Unit Cost

$136

Per GPM
Vent

Direct

Type
10 Yr Cost

$4100

Install+Utilities
Noritz
NRC661-OD-NG

Type: 6.6 GPM Tankless
Fuel: Natural Gas Condensing
Flow: 3 GPM (77* Rise)
Nominal Price: $900
Energy

0.91

Factor
Utility Cost

$222

National Avg
Warranty

12

Yrs Tank/HE
Warranty

5

Yrs Parts
Unit Cost

$136

Per GPM
Vent

Power

Type
10 Yr Cost

$4100

Install+Utilities
Reliance
TS-140-GEH

Type: 6.6 GPM Tankless
Fuel: Natural Gas Condensing
Flow: 2.8 GPM (77* Rise)
Nominal Price: $1100
Energy

0.93

Factor
Utility Cost

$217

National Avg
Warranty

12

Yrs Tank/HE
Warranty

5

Yrs Parts
Unit Cost

$167

Per GPM
Vent

Direct

Type
10 Yr Cost

$4300

Install+Utilities
Reliance
TS-140-GIH

Type: 6.6 GPM Tankless
Fuel: Natural Gas Condensing
Flow: 2.8 GPM (77* Rise)
Nominal Price: $1100
Energy

0.93

Factor
Utility Cost

$217

National Avg
Warranty

12

Yrs Tank/HE
Warranty

5

Yrs Parts
Unit Cost

$167

Per GPM
Vent

Direct

Type
10 Yr Cost

$4300

Install+Utilities
Reliance
TS-240-GEH

Type: 6.6 GPM Tankless
Fuel: Natural Gas Condensing
Flow: 3.9 GPM (77* Rise)
Nominal Price: $1200
Energy

0.95

Factor
Utility Cost

$213

National Avg
Warranty

12

Yrs Tank/HE
Warranty

5

Yrs Parts
Unit Cost

$182

Per GPM
Vent

PowerD

Type
10 Yr Cost

$4300

Install+Utilities
Reliance
TS-240-GIH

Type: 6.6 GPM Tankless
Fuel: Natural Gas Condensing
Flow: 3.9 GPM (77* Rise)
Nominal Price: $1200
Energy

0.95

Factor
Utility Cost

$213

National Avg
Warranty

12

Yrs Tank/HE
Warranty

5

Yrs Parts
Unit Cost

$182

Per GPM
Vent

PowerD

Type
10 Yr Cost

$4300

Install+Utilities
Rinnai
V65e-N

Type: 6.6 GPM Tankless
Fuel: Natural Gas
Flow: 3.2 GPM (77* Rise)
Nominal Price: $700
Energy

0.82

Factor
Utility Cost

$247

National Avg
Warranty

12

Yrs Tank/HE
Warranty

5

Yrs Parts
Unit Cost

$106

Per GPM
Vent

Power

Type
10 Yr Cost

$4200

Install+Utilities
Rinnai
V65i-N

Type: 6.6 GPM Tankless
Fuel: Natural Gas
Flow: 3.2 GPM (77* Rise)
Nominal Price: $700
Energy

0.82

Factor
Utility Cost

$247

National Avg
Warranty

12

Yrs Tank/HE
Warranty

5

Yrs Parts
Unit Cost

$106

Per GPM
Vent

Direct

Type
10 Yr Cost

$4200

Install+Utilities
Takagi
T-H3J-DV-N

Type: 6.6 GPM Tankless
Fuel: Natural Gas Condensing
Flow: 4 GPM (77* Rise)
Nominal Price: $1200
Energy

0.95

Factor
Utility Cost

$213

National Avg
Warranty

15

Yrs Tank/HE
Warranty

5

Yrs Parts
Unit Cost

$182

Per GPM
Vent

PowerD

Type
10 Yr Cost

$4300

Install+Utilities
Takagi
T-H3J-OS-N

Type: 6.6 GPM Tankless
Fuel: Natural Gas Condensing
Flow: 4 GPM (77* Rise)
Nominal Price: $1200
Energy

0.95

Factor
Utility Cost

$213

National Avg
Warranty

15

Yrs Tank/HE
Warranty

5

Yrs Parts
Unit Cost

$182

Per GPM
Vent

Power

Type
10 Yr Cost

$4300

Install+Utilities
Takagi
T-H3M-DV-N

Type: 6.6 GPM Tankless
Fuel: Natural Gas Condensing
Flow: 2.9 GPM (77* Rise)
Nominal Price: $1200
Energy

0.93

Factor
Utility Cost

$217

National Avg
Warranty

15

Yrs Tank/HE
Warranty

5

Yrs Parts
Unit Cost

$182

Per GPM
Vent

Direct

Type
10 Yr Cost

$4400

Install+Utilities
Takagi
T-H3M-OS-N

Type: 6.6 GPM Tankless
Fuel: Natural Gas Condensing
Flow: 2.9 GPM (77* Rise)
Nominal Price: $1200
Energy

0.93

Factor
Utility Cost

$217

National Avg
Warranty

15

Yrs Tank/HE
Warranty

5

Yrs Parts
Unit Cost

$182

Per GPM
Vent

Power

Type
10 Yr Cost

$4400

Install+Utilities
Takagi
T-KJr2-IN-N

Type: 6.6 GPM Tankless
Fuel: Natural Gas
Flow: 3 GPM (77* Rise)
Nominal Price: $600
Energy

0.82

Factor
Utility Cost

$247

National Avg
Warranty

15

Yrs Tank/HE
Warranty

5

Yrs Parts
Unit Cost

$91

Per GPM
Vent

PowerD

Type
10 Yr Cost

$4100

Install+Utilities
Takagi
T-KJr2-OS-N

Type: 6.6 GPM Tankless
Fuel: Natural Gas
Flow: 3 GPM (77* Rise)
Nominal Price: $600
Energy

0.82

Factor
Utility Cost

$247

National Avg
Warranty

15

Yrs Tank/HE
Warranty

5

Yrs Parts
Unit Cost

$91

Per GPM
Vent

Power

Type
10 Yr Cost

$4100

Install+Utilities
Rheem
ECO150DVLN3

Type: 6.4 GPM Tankless
Fuel: Natural Gas
Flow: 3.3 GPM (77* Rise)
Nominal Price: $800
Energy

0.82

Factor
Utility Cost

$247

National Avg
Warranty

12

Yrs Tank/HE
Warranty

5

Yrs Parts
Unit Cost

$125

Per GPM
Vent

Direct

Type
10 Yr Cost

$4300

Install+Utilities
Rheem
ECO150XLN3

Type: 6.4 GPM Tankless
Fuel: Natural Gas
Flow: 3.3 GPM (77* Rise)
Nominal Price: $700
Energy

0.82

Factor
Utility Cost

$247

National Avg
Warranty

12

Yrs Tank/HE
Warranty

5

Yrs Parts
Unit Cost

$109

Per GPM
Vent

Power

Type
10 Yr Cost

$4200

Install+Utilities
Richmond
RMTG64DVLN

Type: 6.4 GPM Tankless
Fuel: Natural Gas
Flow: 3.3 GPM (77* Rise)
Nominal Price: $700
Energy

0.82

Factor
Utility Cost

$247

National Avg
Warranty

12

Yrs Tank/HE
Warranty

5

Yrs Parts
Unit Cost

$109

Per GPM
Vent

Direct

Type
10 Yr Cost

$4200

Install+Utilities
Richmond
RMTG64XLN

Type: 6.4 GPM Tankless
Fuel: Natural Gas
Flow: 3.3 GPM (77* Rise)
Nominal Price: $600
Energy

0.82

Factor
Utility Cost

$247

National Avg
Warranty

12

Yrs Tank/HE
Warranty

5

Yrs Parts
Unit Cost

$94

Per GPM
Vent

Power

Type
10 Yr Cost

$4100

Install+Utilities
Bosch
Therm 520 HN NG

Type: 5.2 GPM Tankless
Fuel: Natural Gas
Flow: 3 GPM (77* Rise)
Nominal Price: $700
Energy

0.8

Factor
Utility Cost

$253

National Avg
Warranty

15

Yrs Tank/HE
Warranty

2

Yrs Parts
Unit Cost

$135

Per GPM
Vent

Atmos

Type
10 Yr Cost

$4200

Install+Utilities
Bosch
Therm 520 PN NG

Type: 5.2 GPM Tankless
Fuel: Natural Gas
Flow: 3 GPM (77* Rise)
Nominal Price: $700
Energy

0.78

Factor
Utility Cost

$259

National Avg
Warranty

15

Yrs Tank/HE
Warranty

2

Yrs Parts
Unit Cost

$135

Per GPM
Vent

Atmos

Type
10 Yr Cost

$4300

Install+Utilities
Bradford White
TG-150E-N

Type: 5 GPM Tankless
Fuel: Natural Gas
Flow: 4.2 GPM (65* Rise)
Nominal Price: $1000
Energy

0.82

Factor
Utility Cost

$247

National Avg
Warranty

12

Yrs Tank/HE
Warranty

5

Yrs Parts
Unit Cost

$200

Per GPM
Vent

Atmos

Type
10 Yr Cost

$4500

Install+Utilities
Bradford White
TG-150I-N

Type: 5 GPM Tankless
Fuel: Natural Gas
Flow: 4.2 GPM (65* Rise)
Nominal Price: $1000
Energy

0.82

Factor
Utility Cost

$247

National Avg
Warranty

12

Yrs Tank/HE
Warranty

5

Yrs Parts
Unit Cost

$200

Per GPM
Vent

Atmos

Type
10 Yr Cost

$4500

Install+Utilities
Noritz
NR501-OD-NG

Type: 5 GPM Tankless
Fuel: Natural Gas
Flow: 2.7 GPM (77* Rise)
Nominal Price: $500
Energy

0.86

Factor
Utility Cost

$235

National Avg
Warranty

12

Yrs Tank/HE
Warranty

5

Yrs Parts
Unit Cost

$100

Per GPM
Vent

Power

Type
10 Yr Cost

$3900

Install+Utilities

About This Data: Operating and 10 year costs are based on US EIA national averages of Electricity ($0.0125/kWh), Natural Gas ($13.50/1000 ft3), and Propane ($3.00/gal). Your state may be higher or lower, so compare relative costs between water heaters. Listed water heater prices are nominal and may vary. Installation costs are assumed $300 (tanks) and $1,000 (tankless).

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