Outdoor tankless water heater prices
Wall-mounted outdoor models need no flue at all, which makes them the easiest gas tankless install in warm climates. 40 models from 3 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
$669
Noritz NR501-OD Non-Condensing Outdoor Tankless Water Heater, Propane · SupplyHouse.com
Typical $/GPM
$178
Median across 28 in-stock listings
Store
All stores
Brand
40 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 |
| Rheem Performance Plus ECO160XLN-3 Non-Condensing Tankless Water Heater, Outdoor, Natural Gas RheemNatural gasOutdoor | 160k BTU | 5.8 | 7 @35° | 0.82 | The Home Depot | $798 | $137 | 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 |
| Noritz NR501-OD Non-Condensing Outdoor Tankless Water Heater, Propane NoritzPropaneOutdoor | 120k BTU | 4.4 | 5 | 0.82 | SupplyHouse.com | $669 | $153 | today | View deal |
| Rinnai RE160eN Non-Condensing Tankless Water Heater, Outdoor, Natural Gas RinnaiNatural gasOutdoor | 160k BTU | 5.8 | 6.6 | 0.81 | The Home Depot | $963 | $167 | today | View deal |
| Rheem Performance Plus ECO200XELN-3 Non-Condensing Tankless Water Heater, Outdoor, Natural Gas RheemNatural gasOutdoor | 199.9k BTU | 7.3 | 9.5 @35° | 0.82 | The Home Depot | $1,243 | $171 | today | View deal |
| Rinnai V53DeP Value Series Non-Condensing Outdoor Tankless Water Heater, Propane RinnaiPropaneOutdoor | 120k BTU | 4.3 | 5.3 | 0.81 | The Home Depot | $742 | $172 | today | View deal |
| Noritz NR501-OD Non-Condensing Outdoor Tankless Water Heater, Natural Gas NoritzNatural gasOutdoor | 120k BTU | 4.4 | 5 | 0.82 | SupplyHouse.com | $752 | $172 | today | View deal |
| Rinnai RE160eP Non-Condensing Tankless Water Heater, Outdoor, Propane RinnaiPropaneOutdoor | 160k BTU | 5.8 | 6.6 | 0.81 | The Home Depot | $993 | $172 | today | View deal |
| Rinnai RE140eN Non-Condensing Tankless Water Heater, Outdoor, Natural Gas RinnaiNatural gasOutdoor | 140k BTU | 5.0 | 5.3 | 0.81 | The Home Depot | $884 | $175 | today | View deal |
| Rinnai V53DeN Value Series Non-Condensing Outdoor Tankless Water Heater, Natural Gas RinnaiNatural gasOutdoor | 120k BTU | 4.3 | 5.3 | 0.81 | The Home Depot | $764 | $177 | 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 |
| Rinnai RE180eN Non-Condensing Tankless Water Heater, Outdoor, Natural Gas RinnaiNatural gasOutdoor | 180k BTU | 6.6 | 8.5 | 0.82 | The Home Depot | $1,200 | $183 | 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 |
| Rinnai RE199eP Non-Condensing Tankless Water Heater, Outdoor, Propane RinnaiPropaneOutdoor | 199k BTU | 7.3 | 9.8 | 0.82 | The Home Depot | $1,391 | $192 | today | View deal |
| Rinnai RE199eN Non-Condensing Tankless Water Heater, Outdoor, Natural Gas RinnaiNatural gasOutdoor | 199k BTU | 7.3 | 9.8 | 0.82 | The Home Depot | $1,391 | $192 | today | View deal |
| Rinnai REP160eN Non-Condensing Tankless Water Heater with Recirculation Pump, Outdoor, Natural Gas RinnaiNatural gasOutdoorRecirc | 160k BTU | 5.8 | 6.6 | 0.81 | The Home Depot | $1,107 | $192 | 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 |
| Noritz NR98OD Non-Condensing Outdoor Tankless Water Heater, Natural Gas NoritzNatural gasOutdoor | 199.9k BTU | 7.3 | 9.8 | 0.82 | SupplyHouse.com | $1,535 | $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 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 |
| 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 |
| 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 NR662-OD Non-Condensing Outdoor Tankless Water Heater, Natural Gas NoritzNatural gasOutdoorOut of stock | 140k BTU | 5.1 | 6.6 | 0.82 | SupplyHouse.com | $900 | $176 | today | View deal |
| A.O. Smith ProLine XE ATO-310U Non-Condensing Outdoor Tankless Water Heater, Natural Gas A.O. SmithNatural gasOutdoorOut of stock | 190k BTU | 6.8 | 8 | 0.81 | SupplyHouse.com | $1,379 | $202 | 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 |
| 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 |
| 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 |
| 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.