The 2026 tankless water heaters worth buying go beyond endless hot water. The newest gas models build in a recirculation pump so hot water reaches the tap in seconds, connect to Wi-Fi for remote control and maintenance alerts, and switch between natural gas and propane. Newer electric units add 3-sensor self-modulation and selectable anti-scald limits. These four represent the current generation.
We compared current features, flow, efficiency and installation using manufacturer specifications and owner feedback. For long-standing favorites see the best tankless water heater guide; our Editorial Policy explains our process. Gas units require professional installation and venting.
Top 3 Best Tankless Water Heaters 2026
Rheem IKONIC RECTGH-SR11iN 11.2 GPM Condensing Tankless with Recirculation
- Recirculation
- Wi-Fi
- 11.2 GPM
Rinnai RXP199iN 11.1 GPM Condensing Smart Sense Tankless with Pump
- Built-in pump
- NG or LP
- Indoor/outdoor
Stiebel Eltron DHX 12-2 Trend 12kW Electric Tankless Water Heater
- 3i sensors
- Anti-scald
- 12kW
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Best Tankless Water Heaters 2026 Compared
| # | Product | Key Features | |
|---|---|---|---|
| 1 |  Rheem IKONIC RECTGH-SR11iN 11.2 GPM Condensing Tankless with Recirculation |
| Check Latest Price |
| 2 |  Rinnai RXP199iN 11.1 GPM Condensing Smart Sense Tankless with Pump |
| Check Latest Price |
| 3 |  GASLAND Gasmart E CE686NG 7.6 GPM Natural Gas Tankless Water Heater |
| Check Latest Price |
| 4 |  Stiebel Eltron DHX 12-2 Trend 12kW Electric Tankless Water Heater |
| Check Latest Price |
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1. Rheem IKONIC RECTGH-SR11iN 11.2 GPM Condensing Tankless with Recirculation
Best Overall 2026
- Condensing, super high efficiency
- 11.2 GPM for whole-house use
- Customizable built-in recirculation
- EcoNet Wi-Fi: usage tracking, alerts and remote settings
- Natural gas version (check fuel)
- Professional install and condensate drain needed
- Fuel: natural gas
- Flow: up to 11.2 GPM
- Model: RECTGH-SR11iN
Rheem’s IKONIC is the most connected tankless heater here: the app shows energy and water use and alerts you when maintenance is due.
Built-in recirculation means no long wait for hot water at the far bathroom.
Who the Rheem IKONIC fits best
Large homes with long pipe runs.
Who should skip the Rheem IKONIC
Homes without natural gas.
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2. Rinnai RXP199iN 11.1 GPM Condensing Smart Sense Tankless with Pump
Best Dual-Fuel
- 11.1 GPM, about 7 fixtures at once
- Built-in recirculation pump
- Smart Sense runs on natural gas or propane
- Versa Vent for indoor or outdoor install
- UEF 0.98
- Outdoor install needs RX-OVC vent cap
- Wi-Fi module sold separately
- Fuel: natural gas or propane
- Flow: up to 11.1 GPM
- Model: RXP199iN
Rinnai’s RXP199iN pairs the flexibility of Smart Sense with a built-in pump, which is new for this series.
Quick Flush makes descaling easier.
Who the Rinnai RXP199iN fits best
Homes that may switch fuel.
Who should skip the Rinnai RXP199iN
Small homes.
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3. GASLAND Gasmart E CE686NG 7.6 GPM Natural Gas Tankless Water Heater
Best Value 2026 Gas
- 199,000 BTU, up to 7.6 GPM
- UEF 0.80, CSA certified
- Multiple built-in safety features
- Indoor natural gas install
- Non-condensing
- Lower flow than the top two
- Fuel: natural gas
- Flow: up to 7.6 GPM
- Model: CE686NG
GASLAND’s Gasmart E is a newer whole-house option for 2–3 bathroom homes.
It is a practical step up from a 50-gallon tank.
Who the GASLAND Gasmart E fits best
Mid-size homes on natural gas.
Who should skip the GASLAND Gasmart E
Propane homes.
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4. Stiebel Eltron DHX 12-2 Trend 12kW Electric Tankless Water Heater
Best New Electric
- 3i technology: flow, inlet and outlet sensors
- Self-modulating 12kW
- LCD with digital temperature 68–140°F
- Selectable anti-scald limits 109, 122 or 131°F
- Can work as a booster
- About 3 GPM, point-of-use or booster role
- Hardwired 240V
- Power: 12kW, 240V
- Flow: about 3 GPM
- Model: DHX 12-2 Trend
The DHX 12-2 is Stiebel Eltron’s newer point-of-use design with three sensors for precise temperature.
Anti-scald limits are useful in homes with children.
Who the Stiebel Eltron DHX 12-2 fits best
One bathroom or a booster.
Who should skip the Stiebel Eltron DHX 12-2
Whole-house use.
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What Is New in 2026 Tankless Water Heaters
Built-in recirculation
A pump keeps hot water near fixtures, cutting the wait and saving water.
Wi-Fi and apps
Apps track usage, set temperatures and send maintenance reminders.
Dual-fuel and flexible venting
Some gas models now run on natural gas or propane and install indoors or out.
| Feature | Benefit | Model here |
|---|---|---|
| Recirculation | Faster hot water | Rheem IKONIC, Rinnai RXP199iN |
| Wi-Fi | Remote control, alerts | Rheem IKONIC |
| Anti-scald limits | Safety | Stiebel DHX 12-2 |
Frequently Asked Questions
What is the best tankless water heater for 2026?
The Rheem IKONIC for its recirculation and Wi-Fi features.
Is recirculation worth it?
Yes in larger homes with long pipe runs.
Do I need a new gas line?
Many 199k BTU units need larger gas lines; ask a licensed installer.
Are electric tankless heaters improving?
Yes, with better sensors and self-modulation.
Final Verdict: Best Tankless Water Heater 2026
The Rheem IKONIC is the best tankless water heater for 2026. The Rinnai RXP199iN is the best dual-fuel model, and the Stiebel Eltron DHX 12-2 is the best new electric unit.
Overall 2026: Rheem IKONIC RECTGH-SR11iN 11.2 GPM Condensing Tankless with Recirculation Check Latest Price
Dual-fuel: Rinnai RXP199iN 11.1 GPM Condensing Smart Sense Tankless with Pump Check Latest Price
New electric: Stiebel Eltron DHX 12-2 Trend 12kW Electric Tankless Water Heater Check Latest Price
The newest models bring hot water faster and smarter.
Looking for something else? Browse all of our Water Heaters guides and the wider Heating & Cooling section.
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