Independente · com fontes · Atualizado 2026-07-11
Best Tankless Water Heaters (2026)
9 produtos comparados pelas especificações que importam e pelo preço nos EUA — do mais barato ao mais caro. Cada especificação e preço remete à sua fonte e à data da coleta.
Os melhores pelos números
Vencedores objetivos — cada um lidera em uma especificação medida, com o número. Sem classificação subjetiva.
- Menor preço: Rheem RTEX-18 ($523.99)
- Highest maxBtuPerHour: Navien NPE-240A2 (199900 maxBtuPerHour)
- Highest powerInputKw: Stiebel Eltron Tempra 36 Plus (36 powerInputKw)
- Highest heatExchangerWarrantyYrs: Rinnai RU199iN (15 heatExchangerWarrantyYrs)
- Lowest weightLbs: EcoSmart ECO 24 (14.25 weightLbs)
Comparação
| # | Tankless Water Heaters | Preço | fuelType | maxFlowRateGpm | maxBtuPerHour | powerInputKw | uniformEnergyFactor | condensingType | Fonte |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Rheem RTEX-18 | $523.99 | electric | 4.4 | — | 18 | 0.94 | electric | rheem.com |
| 2 | EcoSmart ECO 24 | $525 | electric | — | — | 24 | — | electric | ecosmartus.com |
| 3 | Stiebel Eltron Tempra 36 Plus | $1132 | electric | 8.2 | — | 36 | — | electric | stiebel-eltron-usa.com |
| 4 | Noritz NRC711-DV-NG | $1295.62 | natural-gas | 7.1 | 157000 | — | 0.89 | condensing | noritz.com |
| 5 | Rheem RTGH-95DVLN | $1499 | natural-gas | 9.5 | 199900 | — | 0.93 | condensing | files.rheem.com |
| 6 | Navien NPE-240A2 | $2099 | natural-gas | 11.2 | 199900 | — | 0.95 | condensing | navieninc.com |
| 7 | Bosch Greentherm T9900i SE 199 | $3583.27 | natural-gas | 11.2 | 199000 | — | — | condensing | bosch-homecomfort.com |
| 8 | A.O. Smith ProLine XE ATI-540H-N | — | natural-gas | 10 | 199000 | — | 0.93 | condensing | hotwater.com |
| 9 | Rinnai RU199iN | — | natural-gas | 11 | 199000 | — | 0.95 | condensing | rinnai.us |
As especificações são as publicadas pelo fabricante; os preços são o preço sugerido de lançamento nos EUA.
Como compilamos isto
Covers whole-house and point-of-use on-demand (tankless) residential water heaters sold at a published US price, spanning natural-gas, propane, and electric units. Excludes conventional tank-style storage heaters, heat-pump (hybrid) tanks, and commercial rack/manifold systems. Price is typical US MSRP in USD. fuelType is an enum: natural-gas, propane, or electric (dual NG/LP units listed by their primary catalog listing). maxFlowRateGpm is the manufacturer maximum hot-water output in US gallons per minute; it is a peak figure at a nominal temperature rise, NOT a fixed-rise rating. maxBtuPerHour is rated gas input in BTU per hour; null for electric units. powerInputKw is rated electrical input in kilowatts; null for gas units. uniformEnergyFactor is the DOE Uniform Energy Factor (UEF), dimensionless, higher is better; null if not disclosed. condensingType is an enum: condensing, non-condensing, or electric. minActivationFlowGpm is the minimum flow in GPM required to fire the burner or heating element. ventType is an enum: pvc, stainless-steel, concentric, or none (ventless electric). maxTempF is the maximum output setpoint in degrees Fahrenheit. heatExchangerWarrantyYrs is the residential heat-exchanger warranty in years. wifiEnabled is a boolean: true only if native Wi-Fi/app control is built in, false if it requires an add-on module. weightLbs is unit dry weight in pounds.