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Rinnai

Premium Brands · Plumbing

Rinnai Tankless Water Heaters — Puget Sound’s Best Choice for On‑Demand Hot Water

Rinnai has been building gas water heating since 1920 and manufactures US tankless units in Georgia — the SENSEI line carries a 15-year heat-exchanger term with a distinctive operating-hours cap.

Rinnai has been building gas tankless water heaters longer than almost anyone in the industry, and it shows in proven reliability, strong parts support, and a full line of models designed for real homes. For homeowners across the Puget Sound and Greater Seattle area who want dependable, efficient hot water without the footprint of a traditional tank, Rinnai tankless water heaters are a top-tier solution — especially when installed and maintained by Eco Electric, Plumbing, Heating & Air. We are proud to serve as Washington's Home Energy Expert for all Rinnai installations, maintenance, and warranty support.

Condensing tankless (SENSEI) Non-condensing tankless Recirculation
  • 4.9★ · 2,300+ Google reviews
  • Licensed, bonded & insured
  • Serving Puget Sound since 2012
  • 100% Satisfaction Guarantee

At a glance

Who makes Rinnai — and where it sits

Ownership & scale
Rinnai Corporation — founded 1920, Nagoya, Japan; Rinnai America HQ Peachtree City, GA; US tankless manufacturing in Griffin, GA.
Founded
1920
Headquarters
Nagoya, Japan (US: Peachtree City, GA)
Premium — why
The longest gas-tankless pedigree in the market — a century of combustion engineering.

Rinnai by the numbers — vs the category

Heat exchanger warranty (residential)

15 yrs / 12,000 hrs

▏typical tankless HX · Whichever comes first — the hours cap is unique in this lineup.

Figures verified against the manufacturer documents in the Sources section below, 2026-07-17. Category ticks are typical-market reference points, not every competitor.

Where Rinnai fits in your home

Tap a system to explore

Plumbing systems in a Puget Sound home Cross-section of a house showing plumbing systems: the water service entering at the main shutoff with whole-home treatment, the water heater in the basement, kitchen and bathroom fixtures upstairs, and the drain and sewer line leaving the home. Highlighted zones show where Rinnai products live. Upstairs Main floor water service Main shutoff Treatment Water heater Kitchen & bath faucets Toilets & showers Drains & sewer
Rinnai territory The rest of the plumbing system — Eco covers it all

Showing Water heating.

Water heating

Tank, tankless or heat pump Rinnai territory

The water heater is the hardest-working appliance in a Puget Sound home — cold winter mains make sizing and recovery matter. Tanks, condensing tankless, and heat-pump water heaters each fit different homes; venting, condensate, and gas sizing decide as much as the brand does.

Warranty, visualized

15-year / 12,000-hour heat exchanger · 5-year parts

Heat exchanger — SENSEI residential

15 yrs

or 12,000 operation hours

All other parts & components

5 yrs

Labor registration required

5 yrs

5 years registered within 90 days; 1 year otherwise

Setpoint above 160°F

8 yrs

HX coverage reduced

0 yrs 15 yrs

Registration within 90 days of install is what extends labor coverage to five years — which is why Eco registers every new Rinnai system as part of the install. Coverage terminates if the unit is moved to a new location.

Read the manufacturer's warranty terms: Rinnai — SENSEI residential warranty (PDF)

Western Washington fit

Why Rinnai makes sense here — specifically

The other premium tankless answer for cold-mains Puget Sound winters — pick between Rinnai and Navien on features and fit, not on coverage.

  • Condensing SENSEI modulation holds shower temperature through winter supply swings.
  • US-built units with a mature parts and service network.
  • The 12,000-hour cap rewards right-sizing — an oversized unit cycling all day spends its hours faster.

What it costs, honestly

Rinnai against Eco's published ranges

Quoted per home from gas sizing, venting, and recirculation scope — Eco's water heater cost guide carries the published Seattle ranges.

Water heater costs in Seattle

Ranges are Eco's published Seattle / Puget Sound installed prices — your written quote is exact, upfront, and free.

By home type

Which Washington homes Rinnai fits best

Great fit

High-demand gas household

Endless hot water with a century of combustion engineering behind the burner.

Great fit

Recirculation comfort seeker

RUR models handle dedicated- and crossover-loop recirculation for instant-hot-water comfort.

It depends

All-electric home

Rinnai is a gas story — electrifying homes should compare heat-pump water heaters first.

Why Rinnai Tankless Water Heaters are a Smart Fit for Pacific Northwest Homes

  • On‑demand hot water reduces energy waste: Rinnai tankless systems deliver hot water only when you need it, eliminating standby heat loss from storage tanks — a clear advantage in our mild but water‑heavy climate where efficient systems matter year-round.
  • Built for durability and serviceability: Rinnai’s long industry history means proven components and broad parts support, so installations last and repairs are straightforward.
  • Options to match your home: Rinnai offers gas tankless units in configurations for small urban condos to multi‑bath family homes, with indoor/outdoor installation choices and recirculation options to cut wait time and water waste.
  • Better for tight Seattle homes: The compact, wall‑mounted design frees valuable space in smaller homes and townhouses common across the region.
  • Performance in cold inlet temperatures: When sized and installed correctly, Rinnai units handle the larger temperature rise of cold Seattle and Puget Sound groundwater while still delivering consistent flow — a critical benefit for homes with long-run plumbing or multiple simultaneous fixtures.

How Rinnai Solves Common PNW Hot Water Problems

  • Short showers and waiting for hot water: Rinnai systems paired with a properly designed recirculation loop reduce the delay and wasted cold water common in spread‑out Pacific Northwest houses.
  • Elevated energy use from older tanks: Replacing an aging storage tank with a Rinnai tankless can significantly cut natural gas usage and lower monthly bills by removing standby losses.
  • Space and renovation constraints: Wall‑mounted tankless units simplify remodels and frees basement or utility room space for other uses.
  • Hard water and sediment concerns: Fewer internal parts and straightforward service access make corrosion and sediment management easier — Eco’s service plans include regular flushes and checks tailored to local water conditions.
  • Vacation homes and seasonal use: Tankless systems don’t maintain heat continuously, making them safer and more efficient for Puget Sound second homes that sit idle between visits.

Why Eco Electric, Plumbing, Heating & Air Is Washington’s Home Energy Expert for Rinnai

We don’t just sell water heaters — we engineer solutions that last in the Pacific Northwest. As Washington's Home Energy Expert, Eco brings:

  • Factory‑trained Rinnai expertise: Our technicians are experienced with Rinnai product lines and installation best practices so your unit performs at spec.
  • Proper sizing for Puget Sound conditions: We calculate temperature rise based on local inlet water temps, household peak demand, and simultaneous fixture use to recommend the right Rinnai model or cascade arrangement.
  • Permitting and code compliance: Eco handles local permits, gas line upgrades, venting solutions, and inspections required by Seattle and surrounding municipalities.
  • Warranty support and parts access: We register new Rinnai systems, stand behind parts and labor, and leverage Rinnai’s strong parts network to keep downtime minimal.
  • Full service offering: Installation, annual maintenance, emergency repairs, and end‑of‑life replacement — all with transparent pricing and courteous, local technicians who understand PNW homes.

Eco’s Rinnai Installation & Service Process (What to Expect)

  1. 1 On‑site evaluation: We inspect your home’s current plumbing, gas supply, venting, and space constraints, and measure expected peak hot water demand.
  2. 2 Customized recommendation: You’ll get a clear, written proposal that explains the recommended Rinnai model, any required gas or vent upgrades, and options like built‑in recirculation or remote controls.
  3. 3 Professional installation: Our licensed installers take care of gas hookups, termination/vent runs or direct outdoor installs, electrical hookup for controls, leak testing, and system commissioning.
  4. 4 Post‑install walkthrough: We show you controls, set up any Wi‑Fi or app features (if applicable), and register the product with Rinnai.
  5. 5 Ongoing care: Enrollment in our maintenance plans helps prevent mineral buildup, preserves efficiency, and protects your warranty.

Eco Triple Guarantee

When you choose Eco Electric, Plumbing, Heating & Air — Washington's Home Energy Expert — your Rinnai project is backed by our Eco Triple Guarantee:

  • Transparent Pricing Guarantee — No hidden fees; you approve the scope before we start.
  • 100% Satisfaction Guarantee — We don’t consider the job finished until you’re fully satisfied.
  • No Mess Guarantee — We leave your home clean and respectful of your property.

Maintenance, Longevity, and Cost of Ownership

Rinnai tankless heaters are designed for long service life when maintained properly. In the Puget Sound, mineral content and seasonal usage patterns mean annual or biennial maintenance (descaling, inspection of filters and burners) preserves efficiency and performance. Eco’s maintenance plans are tailored to local water quality and household usage, and they include documented service records so your Rinnai warranty remains valid and easy to manage.

Frequently Asked Questions

Will a Rinnai tankless water heater work in my Seattle home?

Yes — when properly sized and installed. Eco’s on‑site evaluation considers cold inlet temperatures, peak simultaneous demand, and layout to recommend the best Rinnai configuration.

Can a tankless unit handle multiple showers and appliances at once?

Many Rinnai models or multiple units in a cascade system can meet high simultaneous demand. We’ll model your peak loads and present options that fit your lifestyle and budget.

Do you help with rebates or utility incentives?

Yes. Eco will help identify any local utility rebates or state incentives applicable to high‑efficiency water heating and assist with the paperwork.

How disruptive is installation?

Most replacements are completed in a day; more complex installs (gas line upgrades, new venting, or cascade systems) may take longer. Our transparent estimate sets expectations up front.

Ready for Reliable, Efficient Hot Water?

If you’re in the Greater Seattle or Puget Sound area and want the performance and longevity that Rinnai tankless water heaters offer — installed and supported by Washington's Home Energy Expert — contact Eco Electric, Plumbing, Heating & Air today.

Eco provides local expertise, proven Rinnai solutions, and the Eco Triple Guarantee so your home gets the hot water performance it deserves.

The honest part

Choose something else instead if…

No brand wins every home. We install and service the alternatives too — so the recommendation follows your house, not a quota.

Choose Navien if built-in recirculation buffering (ComfortFlow) or combi heating is on the wishlist.

Choose A.O. Smith if a heat-pump water heater and the electrification rebates beat the gas math.

Questions? Talk to a real pro.

Licensed, insured, and bonded across the Puget Sound — upfront pricing before work begins.

Sources & references

Warranty terms and specifications verified against the manufacturer's own documents, 2026-07-17. Terms change — the linked documents are always the governing version.

No fine print

The Eco Triple Guarantee

Every electrical, plumbing, and HVAC job is backed by three promises in writing — so you can say yes with total confidence.

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