Rinnai Tankless Water Heaters in Leawood, KS

Rinnai is a Japanese manufacturer that has been building gas appliances since 1920 and is the global leader in tankless water heater sales. In the North American market, Rinnai is often the first brand that comes to mind when homeowners think "tankless." Their residential lineup ranges from compact, affordable non-condensing units to high-capacity condensing models with built-in recirculation.

For Leawood homes, Rinnai's appeal is straightforward: reliable continuous hot water, compact wall-mounted installation, and a lifespan of 20+ years with proper maintenance. Rinnai's condensing units (the RUR and RSC series) achieve thermal efficiency above 90%, meaning less wasted energy per gallon of hot water. Their non-condensing units (the V series) are more affordable and still deliver strong performance.

Rinnai offers built-in recirculation on several models — this means hot water arrives at the fixture faster, reducing the wait time that can be a minor drawback of tankless systems in larger homes. For Leawood homes with long runs between the water heater and the master bathroom (common in neighborhoods like Mission Farms and Hallbrook), recirculation is a meaningful upgrade.

Flow rates on Rinnai residential units range from about 7 GPM on entry-level models to 11+ GPM on their highest-capacity units. For most Leawood homes, a unit in the 8-10 GPM range handles two showers and a kitchen faucet simultaneously without issue. Larger homes may warrant a higher-capacity unit or a dual-unit setup.

In Leawood's hard water, Rinnai tankless units need annual descaling — a vinegar flush through the heat exchanger that takes about an hour. Rinnai makes this straightforward with standard isolation valves. Skipping descaling in 7-10 grain hard water will shorten the unit's life and reduce efficiency.

Rinnai tankless water heaters are available for installation across Leawood. Get a free quote with Rinnai options for your home.