
Go To: AO Smith Top Rated  ProMax  Gas  Electric  Tankless 
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 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 ATI310N Type: 8 GPM Tankless Fuel: Natural Gas Flow: 4.1 GPM (77* Rise) Nominal Price: $1100 
Energy 0.82 Factor 
Utility Cost $247 National Avg 
Warranty 15 Yrs Tank/HE 
Warranty 5 Yrs Parts 
Unit Cost $138 Per GPM 
Vent Power Type 
10 Yr Cost $4600 Install+Utilities 
A O Smith ATI310UN Type: 8 GPM Tankless Fuel: Natural Gas Flow: 4.1 GPM (77* Rise) Nominal Price: $1100 
Energy 0.82 Factor 
Utility Cost $247 National Avg 
Warranty 12 Yrs Tank/HE 
Warranty 5 Yrs Parts 
Unit Cost $138 Per GPM 
Vent Power Type 
10 Yr Cost $4600 Install+Utilities 
A O Smith ATI510N Type: 10 GPM Tankless Fuel: Natural Gas Flow: 4.2 GPM (77* Rise) Nominal Price: $1400 
Energy 0.82 Factor 
Utility Cost $247 National Avg 
Warranty 15 Yrs Tank/HE 
Warranty 5 Yrs Parts 
Unit Cost $140 Per GPM 
Vent Power Type 
10 Yr Cost $4900 Install+Utilities 
A O Smith ATI510UN Type: 10 GPM Tankless Fuel: Natural Gas Flow: 4.2 GPM (77* Rise) Nominal Price: $1400 
Energy 0.82 Factor 
Utility Cost $247 National Avg 
Warranty 12 Yrs Tank/HE 
Warranty 5 Yrs Parts 
Unit Cost $140 Per GPM 
Vent Power Type 
10 Yr Cost $4900 Install+Utilities 
A O Smith ATO310N Type: 8 GPM Tankless Fuel: Natural Gas Flow: 4.1 GPM (77* Rise) Nominal Price: $1100 
Energy 0.82 Factor 
Utility Cost $247 National Avg 
Warranty 15 Yrs Tank/HE 
Warranty 5 Yrs Parts 
Unit Cost $138 Per GPM 
Vent Power Type 
10 Yr Cost $4600 Install+Utilities 
A O Smith ATO310UN Type: 8 GPM Tankless Fuel: Natural Gas Flow: 4.1 GPM (77* Rise) Nominal Price: $1100 
Energy 0.82 Factor 
Utility Cost $247 National Avg 
Warranty 12 Yrs Tank/HE 
Warranty 5 Yrs Parts 
Unit Cost $138 Per GPM 
Vent Power Type 
10 Yr Cost $4600 Install+Utilities 
A O Smith ATO510N Type: 10 GPM Tankless Fuel: Natural Gas Flow: 4.2 GPM (77* Rise) Nominal Price: $1400 
Energy 0.82 Factor 
Utility Cost $247 National Avg 
Warranty 15 Yrs Tank/HE 
Warranty 5 Yrs Parts 
Unit Cost $140 Per GPM 
Vent Power Type 
10 Yr Cost $4900 Install+Utilities 
A O Smith ATO510UN Type: 10 GPM Tankless Fuel: Natural Gas Flow: 4.2 GPM (77* Rise) Nominal Price: $1400 
Energy 0.82 Factor 
Utility Cost $247 National Avg 
Warranty 12 Yrs Tank/HE 
Warranty 5 Yrs Parts 
Unit Cost $140 Per GPM 
Vent Power Type 
10 Yr Cost $4900 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 ATI340HN Type: 8 GPM Tankless Fuel: Natural Gas Condensing Flow: 4.5 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 $150 Per GPM 
Vent PowerD Type 
10 Yr Cost $4300 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 
A O Smith ATO340HN Type: 8 GPM Tankless Fuel: Natural Gas Condensing Flow: 4.5 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 $150 Per GPM 
Vent PowerD Type 
10 Yr Cost $4300 Install+Utilities 
A O Smith ATI540HN Type: 10 GPM Tankless Fuel: Natural Gas Condensing Flow: 4.9 GPM (77* Rise) Nominal Price: $1700 
Energy 0.95 Factor 
Utility Cost $213 National Avg 
Warranty 15 Yrs Tank/HE 
Warranty 5 Yrs Parts 
Unit Cost $170 Per GPM 
Vent PowerD Type 
10 Yr Cost $4800 Install+Utilities 
A O Smith ATO540HN Type: 10 GPM Tankless Fuel: Natural Gas Condensing Flow: 4.9 GPM (77* Rise) Nominal Price: $1700 
Energy 0.95 Factor 
Utility Cost $213 National Avg 
Warranty 15 Yrs Tank/HE 
Warranty 5 Yrs Parts 
Unit Cost $170 Per GPM 
Vent PowerD Type 
10 Yr Cost $4800 Install+Utilities 
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