Are Rinnai Tankless Water Heaters Really The Best?

Rinnai tankless heaters have the best reputation in the industry. They are also among the most expensive. Is the reputation earned or is it the result of aggressive marketing? Are they worth the money? For reasons Tankless Guide outlined below, it’s pretty clear that Rinnai tankless water heaters are among the very best – and possibly the absolute best – tankless water heaters available today.

Rinnai has an Outstanding Service Record

Durability is a main strength of Rinnai tankless water heaters. They need to be repaired less than most other brands on the market. They offer homeowners excellent reliability, and with proper maintenance, often last 15-20 years. Recent advances in durability will only improve their service record and durability. Read the Top Rated Tankless heaters of 2011

Rinnai has the Best Warranty in the Industry

The average heat exchanger warranty is less than 10 years and the average parts warranty is 2-3 years. Rinnai backs their best models with a 12-year heat exchanger warranty and a 5-year parts warranty. As noted above, most continue to perform long past the expiration of their warranty. The length of the warranty is matched by other top models like the Noritz NR111, and all Noritz tankless water heaters are certainly worth a look.

Rinnai Tankless Water Heaters offer High Capacity

A large, whole-house water heater is the most cost-effective source of hot water. Few manufacturers make units with as much capacity as Rinnai, though Noritz, Rheem, Bosch, Takagi and Navien are all worth considering for their large, high-quality tankless water heaters. The Navien NR-240/NP-240 Series models offer up to 11.0 GPM. The Takagi Mobius T-M50, nicknamed The Monster, delivers up to 14.5 GPM of continuous hot water.

Rinnai Water Heaters are Very Efficient

The Rinnai RC98HPi tankless water heater, with 9.8 GPM, is one example, with 96% efficiency. That means that 96% of the heat the unit creates is transferred through the heat exchanger into the water. There’s virtually no waste. Good gas-powered tankless water heaters are 82% to 90% efficient. Few can match the efficiency provided by Rinnai models. Compare Rinnai’s highly efficient models with the 68% to 80% efficiencies found in new standard hot water heaters. It’s easy to see why Rinnai models can lower your water heating costs by up to 50% when one replaces an old traditional water heater.


Rinnai tankless water heaters back up their reputation – and their higher cost – with outstanding quality, reliability and water-heating performance. Most professional installers put them right at the top of the list. Homeowners love their dependability along with the continuous supply of hot water they provide throughout the home. Scan the Reviews of the Rannai Line of tankless water heaters and see for yourself

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