
Go To: Tankless Gas 56 GPM  78 GPM  9 GPM  10 GPM  1119 GPM 
A O Smith ATI110N 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 ATI110UN 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 ATI140HN 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 ATI240HN 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 ATO110N 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 ATO110UN 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 ATO140HN 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 ATO240HN 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 GT110NE 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 GT110NI 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 GT110UE 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 GT110UI 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 GT140NEH 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 GT140NIH 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 NR662ODNG 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 NRC661ADVNG 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 NRC661AODNG 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 NRC661DVNG 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 NRC661ODNG 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 TS140GEH 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 TS140GIH 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 TS240GEH 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 TS240GIH 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 V65eN 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 V65iN 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 TH3JDVN 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 TH3JOSN 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 TH3MDVN 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 TH3MOSN 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 TKJr2INN 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 TKJr2OSN 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 TG150EN 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 TG150IN 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 NR501ODNG 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 
Go to Tankless Water Heater Reviews from Tankless Gas Water Heater Reviews 
Go to Best Water Heater from Tankless Gas Water Heater Reviews 
Facebook Comments
Please share with us what you do or don't like about your current water heater.