Here's The Information You Been Looking For -- Rinnai Tankless Water Heaters
Rinnai makes a number of different types of tankless water heaters -- both for residential and commercial applications. Some Rinnai tankless water heaters are designed for installation indoors, while other models can be mounted externally. Let me describe a few of these models for you.
A great Rinnai model is the R53i PLUS. This indoor tankless water heater is very elegantly designed, featuring a silver powder coated finish and a matching pipe cover. This Rinnai tankless water heater will produce up to 5.3 GPM -- and it's extra-safe: it utilizes a direct electronic ignition system rather than a pilot light. It comes with a 12 year limited warranty on the heat exchanger and a 6 year warranty on all other parts (a standard one year labor warranty is also included on this Rinnai tankless water heater.)
The Rinnai R85i PLUS series of tankless water heaters provide from between 15,000-180,000 BTU/H and a water flow of up to 8.5 gallons per minute. Like the model mentioned above, the R85i PLUS is a great-looker, and also features onboard diagnostics and safety monitoring features. It also provides a battery backup, to allow this unit to operate even when there are power outages. This Rinnai tankless water heater provides up to .84 EF and comes with all the standard warranties.
Many people have much higher demands for heated water: a lot of showers, or a spa tub, or large dishwashers or clothes washers. For these folks I would recommend the Rinnai R981, series of tankless water heaters. These units include an MC-91 Digital temperature controller (other models do as well), and an ability to connect two of these units together is an ideal solution when you need lots and lots of hot water. These models of Rinnai tankless water heaters come with a 10 year limited warranty on the heat exchanger and a 5 year warranty on all parts. They are rated between 19,000-237,000 BTU/H. These units are extremely compact -- only 9" x 18" x 24" in height! Many homeowners, however, need an external water heater -- they may not have enough space in their home for an indoor model, or no safe place to locate it. The Rinnai R981i series of tankless water heaters provide up to .85 EF (an efficiency rating), a 10 year limited warranty on the heat exchanger and a five year warranty on all parts, and provide 19,000-237,000 BTU/H. This Rinnai tankless water heater is designed to operate in the out-of-doors and can heat your water from 98-140°F. It, too, is very compact -- weighing just 55 pounds! -- measuring 9" x 18" x 24" high and will provide 9.8 GPM maximum hot water capacity (at a 35° temperature rise; 5.3 GPM at a 75° temperature rise).
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