Brand Comparison, April 2026
Top Tankless Water Heater Brands
The four brands below account for over 80% of residential tankless installations in the US. Here's how they compare on price, performance, and reliability.
Rinnai
Unit Price Range
$1,100–$2,600
Installed Price
$3,200–$5,000
Max Flow Rate
Up to 11 GPM
Warranty
15-year heat exchanger
Top model: Rinnai RU199iN ($2,100–$2,600), up to Up to 11 GPM
Strengths: Industry leader, widest dealer network, Wi-Fi monitoring on high-end models
Navien
Unit Price Range
$1,000–$2,200
Installed Price
$2,800–$4,500
Max Flow Rate
Up to 11.2 GPM
Warranty
15-year heat exchanger
Top model: Navien NPE-240A2 ($1,800–$2,200), up to Up to 11.2 GPM
Strengths: Best value, built-in recirculation pump, ComfortFlow technology, quietest operation
Rheem
Unit Price Range
$800–$2,000
Installed Price
$2,500–$4,200
Max Flow Rate
Up to 9.5 GPM
Warranty
12-year heat exchanger
Top model: Rheem RTGH-95DVLN ($1,500–$2,000), up to Up to 9.5 GPM
Strengths: Widely available at Home Depot, affordable mid-range option, good customer support
Noritz
Unit Price Range
$900–$2,400
Installed Price
$2,600–$4,800
Max Flow Rate
Up to 11.1 GPM
Warranty
12-year heat exchanger
Top model: Noritz EZ111-DV-NG ($1,600–$2,400), up to Up to 11.1 GPM
Strengths: Commercial-grade reliability, excellent for high-altitude installations, low NOx emissions
Quick Comparison Table
| Brand | Installed Price | Flow Rate | Warranty | Rating |
|---|---|---|---|---|
| Rinnai | $3,200–$5,000 | Up to 11 GPM | 15-year heat exchanger | 4.7 |
| Navien | $2,800–$4,500 | Up to 11.2 GPM | 15-year heat exchanger | 4.6 |
| Rheem | $2,500–$4,200 | Up to 9.5 GPM | 12-year heat exchanger | 4.5 |
| Noritz | $2,600–$4,800 | Up to 11.1 GPM | 12-year heat exchanger | 4.5 |
How to Choose the Right Brand
- Best overall: Rinnai, industry-leading reliability, widest dealer network, and Wi-Fi monitoring on premium models.
- Best value: Navien, built-in recirculation pump saves $500+, with performance matching Rinnai at a lower price.
- Most accessible: Rheem, available at Home Depot and most plumbing supply houses, with solid mid-range performance.
- Best for high-altitude: Noritz, commercial-grade build quality with specialized high-altitude models and low NOx emissions.