Rinnai Tankless Water Heaters

Trust and Leadership

Rinnai is the leading brand of commercial and home tankless water heaters in North America. Located in Peachtree City, GA Rinnai opened state-of-the-art distribution centers, research and training facilities and in 2018 opened a fully integrated manufacturing facility in Griffin, GA to produce tankless water heaters with locally sourced components.

Hot Water Now!starstarstarstarstar4.9 / 5

616 Total Reviews /files//hot_water_now-logo_sm.jpg720-934-8711$1677 Wadsworth Boulevard, Suite A, Lakewood CO

How Tankless Water Heaters Work

With a tankless water heater, cold water is heated only when needed, and it stays hot until you're done using it. Resulting in an endless supply of hot water and little to no wasted energy.

  1. A hot water fixture is turned on
  2. Tankless water heater senses the need for hot water
  3. Cold water enters the system
  4. Flame ignites and heats the heat exchangers
  5. Water preheats as it passes through the secondary heat exchanger
  6. Warm water continues to heat to desired temperature as it passes through stainless steel primary heat exchanger
  7. Hot water exits the unit and travels to the water fixture where it is needed
  8. Flame output adjusts as needed to maintain water temperature during use
  9. When hot water usage is complete, water stops flowing and the flame turns off

Tankless Buying Guide

When choosing the right model, your Hot Water Now! expert can help select the right tankless water heater to suit your needs and meet your expectations. Ask questions such as:

  • Do I run out of hot water?
  • Do I want to run multiple showers or do the laundry and wash dishes at the same time?
  • Do I make the decision to do chores that require hot water strategically during different times of the day?
  • Do I want a recirculation solution to get hot water faster?
  • Location of installation: Rinnai Tankless Water Heaters gives you the flexibility to install on virtually any wall inside your home—not just in the utility room.
  • Venting: Depending on placement within the home, interior models of Rinnai Tankless Water Heaters can vent vertically through the roof or horizontally through an exterior wall.
  • Gas Line Sizes: Rinnai tankless model are designed to provide maximum performance and operating efficiency using either a 1/2" or 3/4" gas line.
Explore the tankless water heaters Hot Water Now! provides.

Rinnai Tankless Model Guide

Rinnai offers a broad range on models to meet the needs of any residential or commercial application.

Model Description UEF
HE 15 models 0.81
HE+ 9 models 0.81 Ok w/ Circ-Logic™
SE 8 models 0.90
SE+ RUR/RU 24 models 0.90 Ok w/ Circ-Logic™
SE+ RUR 8 models 0.90 ThermaCirc360™

Our Featured Tankless Units

Rinnai Tankless Water Heater

Rinnai Tanklesss
  • 0.96 Energy Factor
  • 3 to 6 Fixtures
  • Indoor Only
  • 15,200 to 199,000 BTU

Rinnai Tankless Water Heater

Rinnai Tanklesss
  • 0.96 Energy Factor
  • 2 to 5 Fixtures
  • Indoor Only
  • 15,00 to 199,000 BTU

Rinnai Tankless Water Heater

Rinnai Tanklesss
  • 0.96 Energy Factor
  • 3 to 6 Fixtures
  • Indoor Only
  • 15,200 to 199,000 BTU

Rinnai Tankless Water Heater

Rinnai Tanklesss
  • 0.82 Energy Factor
  • 3 to 5 Fixtures
  • Indoor Only
  • 10,300 to 199,000 BTU

Rinnai Tankless Water Heater

Rinnai Tanklesss
  • 0.82 Energy Factor
  • 2 to 4 Fixtures
  • Indoor Only
  • 10,300 to 199,000 BTU

Rinnai Hybrid Water Heaters

Rinnai's Demand Duo™ Hybrid Water Heating System is the best of both worlds in one high-tech water heating solution! This system is a direct replacement hybrid tankless option with connections similar to most standard efficiency tanks and are not constrained by temporary high hot water flow limitations that can be a challenge for straight tankless models.

Our Featured Hybrid Units

RHS19980HEIN Demand Duo™
80 Gal Residential Hybrid

Rinnai Hybrid Residential Water Heater
  • 0.81 Uniform Energy Factor
  • Natural Gas
  • Indoor Only
  • 10,300 to 199,000 BTU

Natural Gas Hybrid Water Heater

Rinnai Hybrid Residential Water Heaters
  • 0.80 Uniform Energy Factor
  • Natural Gas
  • Indoor Only
  • 59,500 to 91,300 BTU
Tankless water heater cascade installation.

Rinnai Commercial Water Heating

It’s time to give your buildings a more efficient and reliable source of hot water. Rinnai® Tankless and Demand Duo™ Hybrid Commercial Water Heating Systems supply commercial buildings with an endless supply of hot water while you save thousands in operational and life cycle costs.

  • Precision Engineering with a focus on most intensive Commercial Applications
  • Provide Redundancy, Reliability and Space Savings
  • Demand Duo™ models perform better by combining the best of tank and tankless technologies
  • CU Series tankless models available individually or in series with output hot water temperatures as high as 185°F.

Our Featured Commercial Units

Commercial Tankless Water Heater

Rinnai Tanklesss Commercial CU199
  • 0.97 Energy Factor
  • Ultra Low NOx Emissions
  • Indoor Only
  • 15,000 to 199,000 BTU

Demand Duo

Rinnai Hybrid Commercial Water Heater
  • 0.97 Energy Factor
  • Indoor Only
  • 15,000 to 199,000 BTU
  • WiFi Enabled

Rack Systems
Custom Tankless Solutions for Commercial Applications

Rinnai Hybrid Commercial Water Heater

Rinnai custom commercial rack systems are a great solution to your commercial water heating needs. Call or contact Hot Water Now! for your custom rack system estimate.

Rinnai Control-R™ Wireless Module and App

With Wi-Fi connectivity, new and existing Rinnai Residential and Commercial Tankless Water Heaters (2006 and newer) can be remotely monitored and controlled via smart devices. Key benefits include:

  • Control your water heater from anywhere via smart phone or tablet
  • Adjust temperature
  • Register your new water heater via QR code
  • Activate your recirculation system
  • Receive automatic maintenance alerts

EnergySaver® Direct Vent Wall Furnaces

With a Rinnai EnergySaver® Direct Vent Wall Furnace, you can be assured of consistent comfort and warmth. Designed to constantly monitor room temperature, Rinnai’s unique modulating technology can respond immediately to even the smallest temperature fluctuations by optimizing gas use.

  • Quick, flexible, ductless installation
  • Modulating operation for consistent comfortable heating
  • Up to 82% AFUE efficiency
  • High performance variable speed blower to evenly distribute heat throughout your home
  • Natural gas or LP gas
  • Four models with inputs from 3,000 to 36,500 BtuH
Colorado Rebates for Rinnai Products
Attractive rebates are available for both residential and commercial applications that will help offset the cost of your new Rinnai water heating products. Learn more here.
We are your local Rinnai ACE Dealers

We're Your Local
Rinnai ACE Dealers

We are proud to be recognized as one of the top tankless water heater dealers in Colorado by Rinnai.

We carry, install, repair and maintain all water heater brands.

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