Best Tankless Water Heaters in 2025 (Electric & Gas Compared)
Tankless water heaters have revolutionized home water heating by providing on-demand hot water, energy efficiency, and space-saving designs. Whether you’re considering an electric or gas model, 2025 offers a range of options to suit various household needs. In this guide, we’ll compare to find the best tankless water heater in 2025, highlighting the best choices for different categories.
Top Picks Overview
The models below represent the best tankless water heaters in 2025, offering efficient, space-saving solutions for homes of all sizes.
| Category | Model | Type | Highlights |
|---|---|---|---|
| Best Overall | Rinnai Sensei RX199iN | Gas | High efficiency, indoor/outdoor use, 199,000 BTU |
| Best Electric | Stiebel Eltron Tempra 24 Plus | Electric | Advanced flow control, 24 kW, compact design |
| Best Budget | EcoSmart ECO 11 | Electric | Affordable, 13 kW, suitable for small homes |
| Best for Large Homes | Rheem RTGH-95DVLN-3 | Gas | 9.5 GPM, condensing technology, Wi-Fi enabled |
| Best Value | Navien NPE-240S2 | Gas | High efficiency, 11.2 GPM, compact design |
Detailed Reviews
1. Rinnai Sensei RX199iN
Type: Gas
Best For: Overall performance
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- 199,000 BTU, suitable for large households
- Condensing technology for high efficiency
- Indoor and outdoor installation options
- Wi-Fi connectivity for remote monitoring
2. Stiebel Eltron Tempra 24 Plus
Type: Electric
Best For: Energy efficiency
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- 24 kW output, ideal for medium to large homes
- Advanced Flow Control ensures consistent temperature
- Compact design saves space
- Silent operation
3. EcoSmart ECO 11
Type: Electric
Best For: Budget-conscious buyers
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- 13 kW output, suitable for small homes or point-of-use
- Compact and lightweight design
- Self-modulating technology for energy savings
- Lifetime warranty for residential use
4. Rheem RTGH-95DVLN-3
Type: Gas
Best For: Large households
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- 9.5 GPM flow rate, supports multiple outlets simultaneously
- Condensing technology for higher efficiency
- Wi-Fi enabled for remote control and monitoring
- Built-in recirculation pump reduces wait time for hot water
5. Navien NPE-240S2
Type: Gas
Best For: Value
- 11.2 GPM flow rate, suitable for large homes
- Dual stainless steel heat exchangers for durability
- Compact design saves space
- Energy Star certified for efficienc
Buying Guide: What to Consider
- Fuel Type: Choose between electric and gas models based on your home’s infrastructure and energy costs.
- Flow Rate: Measured in GPM (gallons per minute), ensure the unit can handle your household’s hot water demand.
- Energy Efficiency: Look for Energy Star certified models to save on utility bills.
- Installation: Consider professional installation, especially for gas models, to ensure safety and compliance with local codes.
- Warranty: Longer warranties can provide peace of mind and indicate manufacturer confidence.
When evaluating the best tankless water heater 2025 for your home, consider long-term energy savings alongside performance and warranty. Pair your water heater upgrade with a smart thermostat for even greater efficiency.
Frequently Asked Questions
What is the best tankless water heater in 2025?
The Rinnai Sensei RX199iN is the best overall gas tankless water heater in 2025, while the Stiebel Eltron Tempra 24 Plus leads in electric models.
Is a tankless water heater worth it?
Yes. Tankless systems provide endless hot water and reduce energy use by 20–35% compared to traditional tanks.
Can I install a tankless water heater myself?
Electric models can sometimes be DIY-installed. Gas units typically require a licensed plumber due to venting and gas line requirements.
Key Takeaways
- Best Overall: Rinnai Sensei RX199iN offers top-tier performance and versatility.
- Best Electric: Stiebel Eltron Tempra 24 Plus combines efficiency with advanced features.
- Best Budget: EcoSmart ECO 11 is an affordable choice for smaller households.
- Best for Large Homes: Rheem RTGH-95DVLN-3 handles high demand with ease.
- Best Value: Navien NPE-240S2 delivers high efficiency at a competitive price.
Choosing the best tankless water heater 2025 ensures consistent hot water, lower bills, and a more energy-efficient home.