Condensing tankless water heater prices
Condensing heaters recover heat from their own exhaust: UEF of about 0.93 to 0.97, and they vent through ordinary PVC instead of stainless steel. 48 models from 5 stores, with prices checked daily.
Check the size your household needs and what it costs to run.
Best value ($/GPM)
$120
Takagi T-H3S-OS-P Condensing Outdoor Tankless Water Heater, Propane · PEX Universe
Cheapest heater
$560
ThermoMate CZ480LP Indoor Tankless Water Heater, 5.28 GPM, Propane · ThermoMate (official store)
Typical $/GPM
$184
Median across 36 in-stock listings
Store
All stores
Brand
50 listingsAll brands
| Water heater | Store | Checked | Buy | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Takagi T-H3S-OS-P Condensing Outdoor Tankless Water Heater, Propane TakagiPropaneOutdoorCondensing | 180k BTU | 7.5 | 8 | 0.94 | PEX Universe | $906 | $120 | today | View deal |
| Takagi T-H3J-OS-P Condensing Outdoor Tankless Water Heater, Propane TakagiPropaneOutdoorCondensing | 160k BTU | 6.6 | 6.6 | 0.95 | PEX Universe | $796 | $121 | today | View deal |
| ThermoMate CZ480LP Indoor Tankless Water Heater, 5.28 GPM, Propane ThermoMatePropaneCondensing | 114k BTU | 4.6 | 5.28 | 0.91 | ThermoMate (official store) | $560 | $121 | today | View deal |
| ThermoMate CZ480NG Indoor Tankless Water Heater, 5.28 GPM, Natural Gas ThermoMateNatural gasCondensing | 114k BTU | 4.4 | 5.28 | 0.86 | ThermoMate (official store) | $560 | $129 | today | View deal |
| Rinnai RUCS75iP Super High Efficiency Condensing Tankless Water Heater, Indoor, Propane RinnaiPropaneCondensingEnergy Star | 160k BTU | 6.4 | 7.5 | 0.9 | The Home Depot | $899 | $140 | today | View deal |
| Rinnai RUCS75iN Super High Efficiency Condensing Tankless Water Heater, Indoor, Natural Gas RinnaiNatural gasCondensingEnergy Star | 160k BTU | 6.4 | 7.5 | 0.9 | The Home Depot | $899 | $140 | today | View deal |
| Rinnai RUS75eP Super High Efficiency Condensing Tankless Water Heater, Outdoor, Propane RinnaiPropaneOutdoorCondensing | 160k BTU | 6.3 | 7.5 | 0.89 | The Home Depot | $899 | $142 | today | View deal |
| Rinnai RUS75eN Super High Efficiency Condensing Tankless Water Heater, Outdoor, Natural Gas RinnaiNatural gasOutdoorCondensingEnergy Star | 160k BTU | 6.3 | 7.5 | 0.89 | The Home Depot | $899 | $142 | today | View deal |
| Laars LT199 Condensing Indoor Tankless Water Heater, Propane LaarsPropaneCondensingEnergy Star | 199k BTU | 8.5 | 11.1 @35° | 0.96 | PEX Universe | $1,246 | $147 | today | View deal |
| Laars LT199 Condensing Indoor Tankless Water Heater, Natural Gas LaarsNatural gasCondensingEnergy Star | 199k BTU | 8.5 | 11.1 @35° | 0.96 | PEX Universe | $1,246 | $147 | today | View deal |
| Rheem Performance Platinum ECOH200DVELP-3 Condensing Tankless Water Heater, Propane RheemPropaneCondensing | 199.9k BTU | 8.3 | 9.5 @35° | 0.93 | The Home Depot | $1,299 | $157 | today | View deal |
| Rheem Performance Platinum ECOH200DVELN-3 Condensing Tankless Water Heater, Natural Gas RheemNatural gasCondensing | 199.9k BTU | 8.3 | 9.5 @35° | 0.93 | The Home Depot | $1,299 | $157 | today | View deal |
| Rheem Performance Platinum ECOH180DVELN-3 Condensing Tankless Water Heater, Natural Gas RheemNatural gasCondensing | 180k BTU | 7.4 | 9 @35° | 0.93 | The Home Depot | $1,281 | $172 | today | View deal |
| Rinnai RUCS65iP Super High Efficiency Condensing Tankless Water Heater, Indoor, Propane RinnaiPropaneCondensing | 130k BTU | 4.9 | 6.5 | 0.85 | The Home Depot | $849 | $173 | today | View deal |
| Rinnai RUCS65iN Super High Efficiency Condensing Tankless Water Heater, Indoor, Natural Gas RinnaiNatural gasCondensing | 130k BTU | 4.9 | 6.5 | 0.85 | The Home Depot | $849 | $173 | today | View deal |
| Rinnai Sensei RX199iN Condensing Tankless Water Heater, Indoor/Outdoor RinnaiNG or LPIndoor/outdoorCondensingEnergy Star | 199k BTU | 8.7 | 11 | 0.98 | The Home Depot | $1,533 | $177 | today | View deal |
| Rinnai Sensei RX180iN Condensing Tankless Water Heater, Indoor/Outdoor RinnaiNG or LPIndoor/outdoorCondensingEnergy Star | 180k BTU | 7.8 | 10 | 0.98 | The Home Depot | $1,410 | $180 | today | View deal |
| Rheem Performance Platinum ECOH160DVLN-3 Condensing Tankless Water Heater, Natural Gas RheemNatural gasCondensing | 157k BTU | 6.5 | 8.4 @35° | 0.93 | The Home Depot | $1,169 | $180 | today | View deal |
| Rinnai Sensei RX160iN Condensing Tankless Water Heater, Indoor/Outdoor RinnaiNG or LPIndoor/outdoorCondensingEnergy Star | 160k BTU | 6.9 | 9 | 0.97 | The Home Depot | $1,298 | $188 | today | View deal |
| Rheem IKONIC ECOHS200iN Super High Efficiency Condensing Tankless Water Heater, Natural Gas RheemNatural gasCondensing | 199.9k BTU | 8.5 | 11.2 @35° | 0.96 | The Home Depot | $1,700 | $199 | today | View deal |
| Rinnai Sensei RX130iN Condensing Tankless Water Heater, Indoor/Outdoor RinnaiNG or LPIndoor/outdoorCondensingEnergy Star | 130k BTU | 5.6 | 7.1 | 0.97 | The Home Depot | $1,138 | $203 | today | View deal |
| Noritz EZ98DV Condensing Indoor/Outdoor Tankless Water Heater, Propane NoritzPropaneIndoor/outdoorCondensing | 180k BTU | 7.8 | 9.8 @30° | 0.98 | SupplyHouse.com | $1,639 | $209 | today | View deal |
| Rheem IKONIC ECOHSR200iN Super High Efficiency Condensing Tankless Water Heater with Recirculation, Natural Gas RheemNatural gasCondensingRecirc | 199.9k BTU | 8.5 | 11.2 @35° | 0.96 | The Home Depot | $1,799 | $211 | today | View deal |
| Rinnai Sensei RXP199iN Condensing Tankless Water Heater with Recirculation Pump RinnaiNG or LPIndoor/outdoorCondensingRecircEnergy Star | 199k BTU | 8.7 | 11 | 0.98 | The Home Depot | $1,861 | $215 | today | View deal |
| Noritz NRC98DV Condensing Indoor Direct Vent Tankless Water Heater, Natural Gas NoritzNatural gasCondensing | 180k BTU | 7.2 | 9.8 @30° | 0.9 | SupplyHouse.com | $1,550 | $215 | today | View deal |
| Noritz NRC111DV Condensing Indoor Direct Vent Tankless Water Heater, Natural Gas NoritzNatural gasCondensing | 199.9k BTU | 8.1 | 11.1 @30° | 0.91 | PlumbersStock | $1,780 | $220 | today | View deal |
| Noritz NRC661-DV Condensing Indoor Direct Vent Tankless Water Heater, Natural Gas NoritzNatural gasCondensing | 120k BTU | 4.7 | 6.6 | 0.89 | SupplyHouse.com | $1,053 | $222 | today | View deal |
| Noritz NRC111DV Condensing Indoor Direct Vent Tankless Water Heater, Propane NoritzPropaneCondensing | 199.9k BTU | 8.1 | 11.1 @30° | 0.91 | SupplyHouse.com | $1,819 | $225 | today | View deal |
| Noritz NRC111DV Condensing Indoor Direct Vent Tankless Water Heater, Natural Gas NoritzNatural gasCondensing | 199.9k BTU | 8.1 | 11.1 @30° | 0.91 | SupplyHouse.com | $1,820 | $225 | today | View deal |
| Noritz NRC711-DV Condensing Indoor Direct Vent Tankless Water Heater, Propane NoritzPropaneCondensing | 157k BTU | 6.2 | 7.1 | 0.89 | SupplyHouse.com | $1,475 | $238 | today | View deal |
| Noritz NRC98OD Condensing Outdoor Tankless Water Heater, Natural Gas NoritzNatural gasOutdoorCondensing | 180k BTU | 7.4 | 9.8 @30° | 0.92 | SupplyHouse.com | $1,826 | $248 | today | View deal |
| Noritz NRC661-DV Condensing Indoor Direct Vent Tankless Water Heater, Propane NoritzPropaneCondensing | 120k BTU | 4.7 | 6.6 | 0.89 | SupplyHouse.com | $1,188 | $250 | today | View deal |
| A.O. Smith Adapt SC ATM-199M-N Standard Condensing Tankless Water Heater, Natural Gas A.O. SmithNatural gasIndoor/outdoorCondensingEnergy Star | 199k BTU | 6.0 | 6 @67° | 0.95 | SupplyHouse.com | $1,656 | $276 | today | View deal |
| Bosch Greentherm T9900 SE 199 Condensing Tankless Water Heater with Recirculation Pump BoschNG or LPCondensingRecircEnergy Star | 199k BTU | 8.4 | 11.2 @35° | 0.95 | The Home Depot | $2,363 | $281 | today | View deal |
| A.O. Smith Adapt SC ATM-180M-N Standard Condensing Tankless Water Heater, Natural Gas A.O. SmithNatural gasIndoor/outdoorCondensingEnergy Star | 180k BTU | 5.4 | 5.4 @67° | 0.95 | SupplyHouse.com | $1,581 | $293 | today | View deal |
| A.O. Smith Adapt SC ATM-160M-N Standard Condensing Tankless Water Heater, Natural Gas A.O. SmithNatural gasIndoor/outdoorCondensingEnergy Star | 160k BTU | 4.8 | 4.8 @67° | 0.95 | SupplyHouse.com | $1,465 | $305 | today | View deal |
| Noritz NRC98DV Condensing Indoor Direct Vent Tankless Water Heater, Natural Gas NoritzNatural gasCondensingOut of stock | 180k BTU | 7.2 | 9.8 @30° | 0.9 | PlumbersStock | $1,550 | $215 | today | View deal |
| Noritz NRC111OD Condensing Outdoor Tankless Water Heater, Natural Gas NoritzNatural gasOutdoorCondensingOut of stock | 199.9k BTU | 8.1 | 11.1 @30° | 0.91 | SupplyHouse.com | $1,780 | $220 | today | View deal |
| Noritz NRC98DV Condensing Indoor Direct Vent Tankless Water Heater, Propane NoritzPropaneCondensingOut of stock | 180k BTU | 7.2 | 9.8 @30° | 0.9 | SupplyHouse.com | $1,599 | $222 | today | View deal |
| Navien NPE-240S2 Condensing Tankless Water Heater NavienNG or LPIndoor/outdoorCondensingEnergy StarOut of stock | 199.9k BTU | 8.5 | 11.2 @35° | 0.96 | PEX Universe | $1,898 | $223 | today | View deal |
| Navien NPE-240A2 Condensing Tankless Water Heater with ComfortFlow Recirculation NavienNG or LPIndoor/outdoorCondensingRecircEnergy StarOut of stock | 199.9k BTU | 8.4 | 11.2 @35° | 0.95 | PEX Universe | $1,880 | $223 | today | View deal |
| Noritz EZ98DV Condensing Indoor/Outdoor Tankless Water Heater, Natural Gas NoritzNatural gasIndoor/outdoorCondensingOut of stock | 180k BTU | 7.8 | 9.8 @30° | 0.98 | SupplyHouse.com | $1,753 | $224 | today | View deal |
| Noritz NRC711-DV Condensing Indoor Direct Vent Tankless Water Heater, Natural Gas NoritzNatural gasCondensingOut of stock | 157k BTU | 6.2 | 7.1 | 0.89 | SupplyHouse.com | $1,476 | $238 | today | View deal |
| Navien NPE-210S2 Condensing Tankless Water Heater NavienNG or LPIndoor/outdoorCondensingEnergy StarOut of stock | 180k BTU | 7.7 | 10.1 @35° | 0.96 | PEX Universe | $1,999 | $260 | today | View deal |
| Noritz EZTR75 Condensing Tank Replacement Bundle Tankless Water Heater, Natural Gas NoritzNatural gasIndoor/outdoorCondensingOut of stock | 199.9k BTU | 8.7 | 11.1 @30° | 0.98 | SupplyHouse.com | $2,509 | $288 | today | View deal |
| Navien NPE-180S2 Condensing Tankless Water Heater NavienNG or LPIndoor/outdoorCondensingEnergy StarOut of stock | 150k BTU | 6.4 | 8.4 @35° | 0.96 | PEX Universe | $1,999 | $312 | today | View deal |
| A.O. Smith Adapt Premium ATHR-199M Condensing Tankless Water Heater with Recirculation, Natural Gas A.O. SmithNatural gasIndoor/outdoorCondensingRecircEnergy StarOut of stock | 199k BTU | 5.9 | 5.9 @67° | 0.95 | SupplyHouse.com | $2,134 | $362 | today | View deal |
| Noritz EZTR40 Condensing Tank Replacement Bundle Tankless Water Heater, Natural Gas NoritzNatural gasCondensingOut of stock | 120k BTU | 4.6 | 6.6 @30° | 0.87 | SupplyHouse.com | $1,814 | $391 | today | View deal |
| Navien NPE-210A2 Condensing Tankless Water Heater with ComfortFlow Recirculation NavienNG or LPIndoor/outdoorCondensingRecircEnergy StarOut of stock | 180k BTU | 7.6 | 10.1 @35° | 0.95 | PEX Universe | $2,999 | $395 | today | View deal |
| Navien NPE-180A2 Condensing Tankless Water Heater with ComfortFlow Recirculation NavienNG or LPIndoor/outdoorCondensingRecircEnergy StarOut of stock | 150k BTU | 6.3 | 8.4 @35° | 0.95 | PEX Universe | $2,999 | $474 | today | View deal |
$/GPM is the price divided by the hot water flow the heater delivers at a 45 °F temperature rise, worked out from its gas input and UEF. "Box GPM" is the maker's own maximum, often quoted at a much smaller rise, so it is shown but not ranked on. Your rise depends on your incoming water: the sizing calculator works it out from your ZIP.