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Rinnai CV8IL5USDV

Rinnai Header Kit Inline For 5 Units Tankless Water Heater Direct Vent

SKU: CV8IL5USDV
Product ID: 60454
$0.00 - $0.00
$0.00
$1,750.00
$1,750.00 - $1,750.00
$1,750.00

Product Details Rinnai Header Kit Inline For 5 Units Tankless Water Heater Direct Vent CV8IL5USDV The Rinnai Cvent Header Kit Inline 5 Units Direc...

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Rinnai 204000039

Rinnai Conversion Kit Natural Gas to Propane for EX17C / EX17DT / EX17CT

SKU: 204000039
Product ID: 60661
$28.99 - $28.99
$28.99
$28.99 - $28.99
$28.99

Product Details Rinnai Conversion Kit Natural Gas to Propane for EX17C / EX17DT / EX17CT 204000039 The Rinnai 204000039 NG-to-Propane Conversion...

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Rinnai 903000008

Rinnai Triple Switch Plate Assembly For Two Stage Patio Heater Control

SKU: 903000008
Product ID: 60780
$281.00 - $281.00
$281.00
$281.00 - $281.00
$281.00

Product Details Rinnai Triple Switch Plate Assembly for Two Stage Patio Heater Control 903000008 The Rinnai Triple Switch Plate Assembly for Two S...

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Rinnai CV8BB2USDV

Rinnai Cvent Header Kit Back-to-Back 2 Units U.S. Direct Vent

SKU: CV8BB2USDV
Product ID: 60453
$0.00 - $0.00
$0.00
$785.00
$785.00 - $785.00
$785.00

Product Details Rinnai Cvent Header Kit Back-to-Back 2 Units U.S. Direct Vent CV8BB2USDV The Rinnai Cvent Header Kit Back-to-Back 2 Units U.S. Dir...

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Rinnai 204000038

Rinnai Conversion Kit Natural Gas to Propane for EX11C / EX11DT / EX11CT

SKU: 204000038
Product ID: 60660
$30.99 - $30.99
$30.99
$30.99 - $30.99
$30.99

Product Details Rinnai Conversion Kit Natural Gas to Propane for EX11C / EX11DT / EX11CT 204000038 The Rinnai 204000038 NG-to-LP (Natural Gas to...

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Rinnai CV8BB3USDV

Rinnai Cvent Header Kit Back-to-Back 3 Units Direct Vent Supercedes CV8BB3

SKU: CV8BB3USDV
Product ID: 60452
$0.00 - $0.00
$0.00
$1,050.00
$1,050.00 - $1,050.00
$1,050.00

Product Details Rinnai Cvent Header Kit Back-to-Back 3 Units Direct Vent CV8BB3USDV The Rinnai Cvent Header Kit Back-to-Back 3 Units Direct Vent i...

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Rinnai 790087

Rinnai Elbow 6-87 Compatible With Rinnai Tankless Water Heaters

SKU: 790087
Product ID: 60423
$48.00 - $48.00
$48.00
$48.00 - $48.00
$48.00

Product Details Rinnai Elbow 6-87 Compatible With Rinnai Tankless Water Heaters 790087 The Rinnai Elbow 6-87 is a durable, high-performance ventin...

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Rinnai 204000036

Rinnai Conversion Kit Propane to Natural Gas for EX22C / EX22CW

SKU: 204000036
Product ID: 60659
$28.50 - $28.50
$28.50
$28.50 - $28.50
$28.50

Product Details Rinnai Conversion Kit Propane to Natural Gas for EX22C / EX22CW 204000036 The Rinnai 204000036 LP to Natural Gas Conversion Kit ...

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Rinnai 204000035

Rinnai Conversion Kit Propane to Natural Gas for EX17C / EX17DT / EX17CT

SKU: 204000035
Product ID: 60658
$28.50 - $28.50
$28.50
$28.50 - $28.50
$28.50

Product Details Rinnai Conversion Kit Propane to Natural Gas for EX17C / EX17DT / EX17CT 204000035 The Rinnai 204000035 LP-to-Natural Gas Conver...

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Rinnai RTBRACKEXT

Rinnai Tankless Water Heater Rack Add On Extension Kit

SKU: RTBRACKEXT
Product ID: 60778
$132.00 - $132.00
$132.00
$132.00 - $132.00
$132.00

Product Details Rinnai Tankless Water Heater Rack Add On Extension Kit RTBRACKEXT The Rinnai Tankless Water Heater Rack Add On Extension Kit RTBRA...

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Rinnai R-BMS-102

Rinnai BMS Gateway Mounting Bracket For Tankless Recirculation Systems

SKU: R-BMS-102
Product ID: 60776
$83.00 - $83.00
$83.00
$83.00 - $83.00
$83.00

Product Details Rinnai BMS Gateway Mounting Bracket for Tankless Recirculation Systems R-BMS-102 The Rinnai BMS Gateway Mounting Bracket for Tankl...

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Rinnai 204000034

Rinnai Conversion Kit Propane to Natural Gas for EX11C / EX11DT / EX11CT

SKU: 204000034
Product ID: 60657
$29.99 - $29.99
$29.99
$29.99 - $29.99
$29.99

Product Details Rinnai Conversion Kit Propane to Natural Gas for EX11C / EX11DT / EX11CT 204000034 The Rinnai 204000034 Propane to Natural Gas C...

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Rinnai Tankless Water Heater and Boiler Standing Rack

SKU: RTBRACKA
Product ID: 60775
$472.00 - $472.00
$472.00
$472.00 - $472.00
$472.00

Product Details Rinnai Tankless Water Heater and Boiler Standing Rack RTBRACKA The Rinnai Tankless Water Heater and Boiler Standing Rack RTBRACKA ...

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Rinnai 791041

Rinnai Vertical Common Vent Wall Flashing Intake With Wired Cap

SKU: 791041
Product ID: 60773
$63.00 - $63.00
$63.00
$63.00 - $63.00
$63.00

Product Details Rinnai Vertical Common Vent Wall Flashing Intake with Wired Cap 791041 The Rinnai Vertical Common Vent Wall Flashing Intake with W...

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Rinnai 790086

Rinnai 2x Elbow 6-45 Compatible With Rinnai Tankless Water Heaters

SKU: 790086
Product ID: 60422
$70.00 - $70.00
$70.00
$70.00 - $70.00
$70.00

Product Details Rinnai 2x Elbow 6-45 Compatible with Rinnai Tankless Water Heaters 790086 The Rinnai Elbow 6-45 (2x) is a high-quality, durable c...

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Rinnai 791041

Rinnai Wall Thermostat Relay Board Kit for Direct Vent Wall Furnace Heaters

SKU: FOT-269
Product ID: 60655
$226.84 - $226.84
$226.84
$226.84 - $226.84
$226.84

Product Details Rinnai Wall Thermostat Relay Board Kit for Direct Vent Wall Furnace Heaters FOT-269 The Rinnai FOT-269 Wall Thermostat Relay Boa...

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Rinnai 223174PP

Rinnai Tankless Water Heater 3"/5" Condensing Horizontal Termination Kit

SKU: 223174PP
Product ID: 60334
$117.00 - $117.00
$117.00
$117.00 - $117.00
$117.00

Product Details Rinnai Tankless Water Heater 3"/5" Condensing Horizontal Termination Kit 223174PP The Rinnai 223174PP Condensing Horizontal Te...

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Rinnai 184118-S

Rinnai Roof Discharge Terminal For Concentric Vent Systems

SKU: 184118-S
Product ID: 60333
$131.00 - $131.00
$131.00
$131.00 - $131.00
$131.00

Product Details Rinnai Roof Discharge Terminal For Concentric Vent Systems 184118-S The Rinnai 184118-S Roof Discharge Terminal is designed fo...

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Rinnai 223177PP

Rinnai Polypropylene Concentric Vent For RCi Series Tankless Water Heaters

SKU: 223177PP
Product ID: 60332
$130.00 - $130.00
$130.00
$130.00 - $130.00
$130.00

Product Details Rinnai Polypropylene Concentric Vent For RCi Series Tankless Water Heaters 223177PP The Rinnai 223177PP Polypropylene Concentr...

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Rinnai 185344PP

Rinnai 3"/5" Roof Termination Extension Kit For Tankless Water Heaters

SKU: 185344PP
Product ID: 60331
$98.00 - $98.00
$98.00
$98.00 - $98.00
$98.00

Product Details Rinnai 3"/5" Roof Termination Extension Kit For Tankless Water Heaters 185344PP The Rinnai 185344PP Roof Termination Extension K...

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Rinnai 185347PP

Rinnai 3"/ 5" Separation Kit For I- Series Condensing Gas Boilers

SKU: 185347PP
Product ID: 60330
$39.00 - $39.00
$39.00
$39.00 - $39.00
$39.00

Product Details Rinnai 3"/ 5" Separation Kit For I- Series Condensing Gas Boilers 185347PP The Rinnai 185347PP Vent Separation Kit is designed...

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Rinnai 223186PP

Rinnai Concentric Venting Condensing Horizontal Termination Diverter Kit

SKU: 223186PP
Product ID: 60329
$140.00 - $140.00
$140.00
$140.00 - $140.00
$140.00

Product Details Rinnai Concentric Venting Condensing Horizontal Termination Diverter Kit 223186PP The Rinnai 223186PP 3x5 Concentric Venting Co...

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Rinnai 223176PP

Rinnai Concentric Vent System For RCi Series Tankless Water Heaters

SKU: 223176PP
Product ID: 60328
$126.00 - $126.00
$126.00
$126.00 - $126.00
$126.00

Product Details Rinnai Concentric Vent System for RCi Series Tankless Water Heaters 223176PP The Rinnai 223176PP Concentric Vent System is engi...

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Rinnai 184162PP

Rinnai Roof Discharge Terminal For Condensing Tankless Water Heaters

SKU: 184162PP
Product ID: 60327
$126.00 - $126.00
$126.00
$126.00 - $126.00
$126.00

Product Details Rinnai Roof Discharge Terminal for Condensing Tankless Water Heaters 184162PP The Rinnai 184162PP Roof Discharge Terminal is a ...

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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.

You Might Also Like

•  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.

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