Rinnai Water Heaters, Boilers & Heating

Sort by

View as

Rinnai Cascade Cable 10" For Commercial Tank Use REU-CSA-C1

SKU: REU-CSA-C1

Product ID: 60547

$76.00 - $76.00

$76.00

$76.00 - $76.00

$76.00

Product Details Rinnai Cascade Cable 10" For Commercial Tank Use REU-CSA-C1 The Rinnai REU-CSA-C1 is a 10-foot (3-meter) cascade harness designed ...

View full details

Rinnai Cascade Cable 25" For Commercial Tank Use REU-CSA-C2

SKU: REU-CSA-C2

Product ID: 60546

$140.00 - $140.00

$140.00

$140.00 - $140.00

$140.00

Product Details Rinnai Cascade Cable 25" For Commercial Tank Use REU-CSA-C2 The Rinnai REU-CSA-C2 is a 26-foot (8-meter) electronic cascade cable ...

View full details

Rinnai Pipe Cover Bottom Plate Commercial PCD07-IB-BP

SKU: PCD07-IB-BP

Product ID: 60545

$111.00 - $111.00

$111.00

$111.00 - $111.00

$111.00

Product Details Rinnai Pipe Cover Bottom Plate Commercial PCD07-IB-BP The Rinnai PCD07-IB-BP is a commercial pipe cover bottom plate designed to c...

View full details

Rinnai Condensing Wall Termination Kit 21" With Two Wall Plates 229016NPP

SKU: 229016NPP

Product ID: 60544

$77.00 - $77.00

$77.00

$77.00 - $77.00

$77.00

Product Details Rinnai Condensing Wall Termination Kit 21" With Two Wall Plates 229016NPP The Rinnai 229016NPP is a 2/4-inch (60/100 mm) condensin...

View full details

Rinnai Vent Adapter 2" x 4" Condensing Horizontal Starter 229253NPP

SKU: 229253NPP

Product ID: 60543

$49.00 - $49.00

$49.00

$49.00 - $49.00

$49.00

Product Details Rinnai Vent Adapter 2" x 4" Condensing Horizontal Starter 229253NPP The Rinnai 229253NPP is a 2/4-inch (60/100 mm) condensing hori...

View full details

Rinnai Vent Support Bracket 2" x 4" 224056

SKU: 224056

Product ID: 60542

$55.00 - $55.00

$55.00

$55.00 - $55.00

$55.00

Product Details Rinnai Vent Support Bracket 2" x 4" 224056 The Rinnai 224056 is a 2-inch / 4-inch vent support bracket designed to secure and stab...

View full details

Rinnai Horizontal Termination Kit 2" x 4" x 12" 229012NPP

SKU: 229012NPP

Product ID: 60540

$112.00 - $112.00

$112.00

$112.00 - $112.00

$112.00

Product Details Rinnai Horizontal Termination Kit 2" x 4" x 12" 229012NPP The Rinnai 229012NPP is a 2/4-inch (60/100 mm) condensing horizontal ter...

View full details

Rinnai Termination Vent Kit 2" x 4" x 21" Plastic Condensing Horizontal

SKU: 229013NPP

Product ID: 60539

$117.00 - $117.00

$117.00

$117.00 - $117.00

$117.00

Product Details Rinnai Termination Vent Kit 2" x 4" x 21" Plastic Condensing Horizontal 229013NPP The Rinnai 229013NPP is a 2/4-inch (60/100 mm) c...

View full details

Rinnai Condensing Vent Elbow 90-Degree 2" x 4" 229230NPP

SKU: 229230NPP

Product ID: 60538

$46.00 - $46.00

$46.00

$46.00 - $46.00

$46.00

Product Details Rinnai Condensing Vent Elbow 90-Degree 2" x 4" 229230NPP The Rinnai 229230NPP is a 2/4-inch (60/100 mm) condensing 90-degree vent ...

View full details

Rinnai Concentric Vent Roof Termination Kit 2" x 4" 60/100 20" With Clamp

SKU: 224356NPP

Product ID: 60537

$112.00 - $112.00

$112.00

$112.00 - $112.00

$112.00

Product Details Rinnai Concentric Vent Roof Termination Kit 2" x 4" 60/100 20" With Clamp 224356NPP The Rinnai 224356NPP is a 2/4-inch (60/100 mm)...

View full details

Rinnai Condensing Vent Extension Pipe 2" x 4" 60/100 mm 229308NPP

SKU: 229308NPP

Product ID: 60536

$41.00 - $41.00

$41.00

$41.00 - $41.00

$41.00

Product Details Rinnai Condensing Vent Extension Pipe 2" x 4" 60/100 mm 229308NPP The Rinnai 790138 is a 6-inch Room Air (RA) Common Vent Starter ...

View full details

Rinnai Direct Vent Common Starter Kit 4" Polypropylene 790132

SKU: 790132

Product ID: 60535

$165.00 - $165.00

$165.00

$165.00 - $165.00

$165.00

Product Details Rinnai Direct Vent Common Starter Kit 4" Polypropylene 790132 The Rinnai 790132 is a 4-inch Direct Vent (DV) Common Vent Starter K...

View full details

Rinnai Vent Adapter 2" x 4" Condensing Vertical Starter 227412NPP

SKU: 227412NPP

Product ID: 60534

$64.00 - $64.00

$64.00

$64.00 - $64.00

$64.00

Product Details Rinnai Vent Adapter 2" x 4" Condensing Vertical Starter 227412NPP The Rinnai 227412NPP is a 2-inch / 4-inch (60/100 mm) condensing...

View full details

Rinnai Condensing Vent Extension Pipe 2" x 4" 19.5 in Concentric

SKU: 229309NPP

Product ID: 60533

$51.00 - $51.00

$51.00

$51.00 - $51.00

$51.00

Product Details Rinnai Condensing Vent Extension Pipe 2" x 4" 19.5 in Concentric 229309NPP The Rinnai 229309NPP is a 2-inch / 4-inch (60/100 mm) c...

View full details

Rinnai 6" Direct Vent Common Starter Kit Polypropylene 790133

SKU: 790133

Product ID: 60528

$210.00 - $210.00

$210.00

$210.00 - $210.00

$210.00

Product Details Rinnai 6" Direct Vent Common Starter Kit Polypropylene 790133 The Rinnai 790133 is a 6-inch Direct Vent (DV) Common Vent Starter K...

View full details

SKU: TRW02CXPiN

Product ID: 60274

$0.00 - $0.00

$0.00

$5,977.50

$5,977.50 - $5,977.50

$5,977.50

Product Details Rinnai Commercial Rack System Wall Mounted With 2 Unit Tankless Water Heater TRW02CXPiN This 2-unit wall-mounted design solution i...

View full details

Rinnai has spent more than a century refining gas and electric appliances around a single idea: deliver heat and hot water the moment they are called for, without the standby waste of older equipment. That engineering focus is why contractors reach for the brand when a job demands consistent output and a long service life, and it is the standard we hold every Rinnai product on this page to.

This collection brings the Rinnai range together in one place so you can match the right system to the property in front of you. Whether you are sizing hot water for a busy household, planning a heating retrofit, or sourcing a replacement for an aging unit, you are working with equipment built to current efficiency standards and supported the way a premium purchase should be. We treat every order as a project to get right, and our team is here when you need guidance on fit, configuration, or compatibility.

Why Choose Rinnai from HVAC Store?

• Comprehensive warranty coverage on Rinnai equipment gives you peace of mind on every purchase.

• Expert technical support helps you confirm sizing, fuel type, and configuration before you buy.

• A curated Rinnai range built to the efficiency and performance standards professionals rely on.

• Tailored guidance from a team that treats your install as a project worth getting right.

• Tankless Water Heaters - Compare on-demand water heating across brands and BTU outputs to find the right capacity for your property.

• Electric Heat Pump Water Heaters - See high-efficiency electric water heating that pulls ambient heat to cut energy use over a tank's lifespan.

• Boilers - Browse residential and light commercial boilers for hydronic heating and combined heating and hot water applications.

• Rinnai Parts - Source genuine Rinnai conversion kits, vent components, and replacement parts to service and maintain your equipment.

Best Rinnai Systems for...

High-Demand Households

The best Rinnai system for a high-demand household is a condensing tankless water heater, which delivers continuous hot water without the recovery lag of a storage tank. For homes running several fixtures at once, look to the 199,000 BTU SENSEI models for the largest draw.

Energy-Conscious Replacements

The best Rinnai option for an energy-conscious replacement is an electric heat pump water heater, which moves ambient heat into the tank instead of generating it directly. A residential heat pump model suits homes converting from older electric or gas storage tanks to lower long-term operating costs.

Hydronic and Radiant Heating

The best Rinnai equipment for hydronic and radiant heating is a gas boiler, which heats water for distribution through radiators, baseboards, or in-floor loops. Match the unit to the system's load and layout; Rinnai boilers serve both heating-only and combined heating and hot water setups.

Supplemental Room Heating

The best Rinnai choice for supplemental room heating is a direct vent wall furnace, which warms a single space without ducting and vents combustion gases straight outside. A natural gas or propane wall furnace delivers zoned warmth in additions, garages, and rooms the central system struggles to reach.

FAQ

How long does a Rinnai tankless water heater last?

A Rinnai tankless water heater typically lasts 15 to 20 years with proper installation and annual maintenance, well beyond the 10 to 12 years expected from a conventional storage tank. Lifespan depends heavily on water quality and upkeep, so annual flushing and descaling, especially in hard-water areas, is what keeps a unit performing across that span.

How often should I flush a Rinnai tankless water heater?

Flush a Rinnai tankless water heater at least once a year to clear mineral scale from the heat exchanger. Homes with hard water or heavy hot water demand benefit from more frequent flushing, while a household with soft water can often extend the interval to every two to three years. Both condensing and non-condensing models require the same annual service.

What is the difference between condensing and non-condensing Rinnai models?

Condensing Rinnai models use a second heat exchanger to capture residual heat from exhaust gas, reaching higher efficiency (UEF up to roughly 0.96 to 0.98) and allowing flexible PVC venting, but they require a condensate drain. Non-condensing models use a single heat exchanger, cost less upfront, and need metal venting. The SENSEI condensing line covers the high-efficiency end of this collection.

How do I size a Rinnai tankless water heater?

Size a Rinnai tankless water heater by adding the flow rates of the fixtures you expect to run at once, then matching that total to the model's output at your required temperature rise. A shower draws roughly 2 to 2.5 GPM, so two showers plus a sink can mean 5 GPM, and colder groundwater raises the temperature rise the unit must cover. Higher demand points toward the 199,000 BTU models.

Will a Rinnai tankless water heater work during a power outage?

No, a Rinnai tankless water heater will not operate during a power outage, because the unit relies on electronic ignition and controls to heat water on demand. Homes in outage-prone areas can pair the unit with a compatible battery backup to maintain hot water when the power is down. This applies to gas tankless models across the range.

Are Rinnai tankless water heaters worth it?

Rinnai tankless water heaters are worth it for households that want endless on-demand hot water, lower standby energy loss, and a longer service life, though they carry a higher upfront and installation cost than a storage tank. Because the unit heats water only when needed and lasts up to 20 years, the long-term value tends to favor homes with steady or high hot water use over the equipment's lifespan.

Need a Quote?

Rinnai

Filters

Rinnai Cascade Cable 10" For Commercial Tank Use REU-CSA-C1

Rinnai Cascade Cable 25" For Commercial Tank Use REU-CSA-C2

Rinnai Pipe Cover Bottom Plate Commercial PCD07-IB-BP

Rinnai Condensing Wall Termination Kit 21" With Two Wall Plates 229016NPP

Rinnai Vent Adapter 2" x 4" Condensing Horizontal Starter 229253NPP

Rinnai Vent Support Bracket 2" x 4" 224056

Rinnai Horizontal Termination Kit 2" x 4" x 12" 229012NPP

Rinnai Termination Vent Kit 2" x 4" x 21" Plastic Condensing Horizontal

Rinnai Condensing Vent Elbow 90-Degree 2" x 4" 229230NPP

Rinnai Concentric Vent Roof Termination Kit 2" x 4" 60/100 20" With Clamp

Rinnai Condensing Vent Extension Pipe 2" x 4" 60/100 mm 229308NPP

Rinnai Direct Vent Common Starter Kit 4" Polypropylene 790132

Rinnai Vent Adapter 2" x 4" Condensing Vertical Starter 227412NPP

Rinnai Condensing Vent Extension Pipe 2" x 4" 19.5 in Concentric

Rinnai 6" Direct Vent Common Starter Kit Polypropylene 790133

Rinnai Condensing Roof Term Extension Kit 2" x 4" 60/100 Polypropylene

Rinnai 8" Room Air Back-to-Back 7 Unit Header Kit Common Venting

Rinnai 8" Direct Vent Back-to-Back 7 Unit Header Kit Common Venting

Rinnai 8" Direct Vent Back-to-Back 6 Unit Header Kit Common Venting

Rinnai 8" Direct Vent Back-to-Back 8 Unit Header Kit Common Venting

Rinnai Commercial Rack System With Two Tankless Water Heater Wall Mounted

Rinnai Commercial Rack System With 3 Unit Tankless Water Heater Wall Mount

Rinnai Commercial Rack System Wall Mount With 3 Unit Tankless Water Heater

Rinnai Commercial Rack System Wall Mount With 2 Unit Tankless Water Heater

Why Choose Rinnai from HVAC Store?

You Might Also Like

Best Rinnai Systems for...

High-Demand Households

Energy-Conscious Replacements

Hydronic and Radiant Heating

Supplemental Room Heating

FAQ

Added to your cart: