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This is Rinnai's high-capacity condensing tankless unit: 130,000 BTU of natural gas input, up to 6.5 GPM, and a 0.85 Uniform Energy Factor that puts it among the most efficient gas heaters sold. It runs two showers at once in mild climates, or one shower plus a dishwasher and laundry, and its 98-140°F range and 3/4-inch connections suit most whole-home retrofits. Against non-condensing rivals it recovers efficiency that otherwise goes up the vent, but it needs a condensing-grade vent and a drain for condensate. Owners of Rinnai tankless units generally report steady hot water and long service life; the common complaints are installer-dependent venting cost and the wait for hot water at distant taps.
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Lowest price we've seen: $849.00 on Nov 9 at Lowe's. Tracked across 2 stores since Nov 9.
Owners of Rinnai tankless heaters praise endless hot water and lower gas bills, and report units lasting well past a decade with basic maintenance. Criticism centers on installation cost, the cold-water sandwich at startup, and the maintenance hard water demands.
This Rinnai Super High Efficiency tankless water heater runs on natural gas and heats water on demand instead of storing it in a tank. It is rated for residential use and for interior installation. It has a 130,000 BTU input and a maximum flow rate of 6.5 gallons per minute.
The unit mounts on the wall and uses electric ignition. It vents through gas single-wall vent and connects to water lines with 3/4-inch fittings. It is a high altitude model and can be used in mobile homes. It is Wi-Fi compatible and has an Ultra Low NOx emission rating and a Uniform Energy Factor of 0.85.
Output temperature can be set from 98 to 140 degrees Fahrenheit. The heater is sized for a family of 6 and carries a 12-year limited warranty.
