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Rinnai 790027

Rinnai 4" Common Vent 90 Degrees Elbow For Condensing Vent Systems

SKU: 790027
Product ID: 60409
$33.00 - $33.00
$33.00
$33.00 - $33.00
$33.00

Product Details Rinnai 4" Common Vent 90 Degrees Elbow For Condensing Vent Systems 790027 The Rinnai 790027 CVent Elbow is a precisio...

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Rinnai 790026

Rinnai 4" Common Vent 45 Degrees Elbow 2 Pieces

SKU: 790026
Product ID: 60406
$45.00 - $45.00
$45.00
$45.00 - $45.00
$45.00

Product Details Rinnai 4" Common Vent 45 Degrees Elbow 2 Pieces 790026 The Rinnai 790026 CVent Elbow is a precision‑engineered venting ac...

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Rinnai 804000024

Rinnai Liquid Propane To NG Conversion Kit For E110C/E100CR Boilers

SKU: 804000024
Product ID: 60404
$135.00 - $135.00
$135.00
$135.00 - $135.00
$135.00

Product Details Rinnai Liquid Propane To NG Conversion Kit For E110C/E100CR Boilers 804000024 The Rinnai 804000024 LP to NG Conversion ...

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Rinnai 804000026

Rinnai Liquid Propane To Natural Gas Conversion Kit For Q130S Boilers

SKU: 804000026
Product ID: 60402
$135.00 - $135.00
$135.00
$135.00 - $135.00
$135.00

Product Details Rinnai Liquid Propane To Natural Gas Conversion Kit For Q130S Boilers 804000026 The Rinnai 804000026 LP to NG Conversio...

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Rinnai 804000027

Rinnai Liquid Propane To Natural Gas Conversion Kit For Q175S Boilers

SKU: 804000027
Product ID: 60401
$205.00 - $205.00
$205.00
$205.00 - $205.00
$205.00

Product Details Rinnai Liquid Propane To Natural Gas Conversion Kit For Q175S Boilers 804000027 The Rinnai 804000027 LP to NG Convers...

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Rinnai 804000025

Rinnai Liquid Propane To Natural Gas Conversion Kit For Q85S Boilers

SKU: 804000025
Product ID: 60398
$143.00 - $143.00
$143.00
$143.00 - $143.00
$143.00

Product Details Rinnai Liquid Propane To Natural Gas Conversion Kit For Q85S Boilers 804000025 The Rinnai 804000025 is a field conver...

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Rinnai 790091

Rinnai Metal Bracket 4 Feet Support For Common Vent Piping

SKU: 790091
Product ID: 60395
$26.00 - $26.00
$26.00
$26.00 - $26.00
$26.00

Product Details Rinnai Metal Bracket 4 Feet Support For Common Vent Piping 790091 The Rinnai 790091 Metal Bracket is a durable mounti...

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Rinnai 224069

Rinnai Condensate Collector 6' For Condensing Tankless Water Heaters

SKU: 224069
Product ID: 60390
$99.00 - $99.00
$99.00
$99.00 - $99.00
$99.00

Product Details Rinnai Condensate Collector 6' For Condensing Tankless Water Heaters 224069 The Rinnai 224069 Condensate Collector is...

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Rinnai FOT-221

Rinnai 60" To 80" Vent Extension Set For Wall Furnaces EX17C/EX22

SKU: FOT-221
Product ID: 60389
$492.90 - $492.90
$492.90
$492.90 - $492.90
$492.90

Product Details Rinnai 60" To 80" Vent Extension Set For Wall Furnaces EX17C/EX22 FOT-221 The Rinnai FOT-221 Vent Kit is designed to ex...

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Rinnai RGB-CTWH-3

Rinnai Recess Box For Condensing SE Series Models RUCS and RUS

SKU: RGB-CTWH-3
Product ID: 60388
$869.00 - $869.00
$869.00
$869.00 - $869.00
$869.00

Product Details Rinnai Recess Box For Condensing SE Series Models RUCS and RUS RGB-CTWH-3 The Rinnai RGB-CTWH-3 is a recessed installat...

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Rinnai REU-MSB-C3

Rinnai Cascade Cable For V Series Units

SKU: REU-MSB-C3
Product ID: 60387
$40.00 - $40.00
$40.00
$40.00 - $40.00
$40.00

Product Details Rinnai Cascade Cable For V Series Units REU-MSB-C3 The Rinnai REU-MSB-C3 is a high-quality cascade cable designed for c...

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Rinnai FOT-150

Rinnai Vent Kit S 3"–4.5" For Direct Vent Tankless Water Heaters

SKU: FOT-150
Product ID: 60386
$226.84 - $226.84
$226.84
$226.84 - $226.84
$226.84

Product Details Rinnai Vent Kit S 3"–4.5" For Direct Vent Tankless Water Heaters FOT-150 The Rinnai FOT-150 Vent Kit S is a compact ven...

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Rinnai FOT-102

Rinnai 11" To 20" Vent Extension Set For Wall Furnaces ES38C

SKU: FOT-102
Product ID: 60385
$248.04 - $248.04
$248.04
$248.04 - $248.04
$248.04

Product Details Rinnai 11" To 20" Vent Extension Set For Wall Furnaces ES38C FOT-102 The Rinnai FOT-102 Vent Extension Kit is designe...

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Rinnai FOT-114

Rinnai 60" To 80" Vent Extension Set For Wall Furnaces ES38C

SKU: FOT-114
Product ID: 60384
$409.16 - $409.16
$409.16
$409.16 - $409.16
$409.16

Product Details Rinnai 60" To 80" Vent Extension Set For Wall Furnaces ES38C FOT-114 The Rinnai FOT-114 Vent Extension Kit is designe...

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Rinnai FOT-115

Rinnai Elbow For Vent Extension Kits

SKU: FOT-115
Product ID: 60383
$116.60 - $116.60
$116.60
$116.60 - $116.60
$116.60

Product Details Rinnai Elbow For Vent Extension Kits FOT-115 The Rinnai FOT-115 Elbow is a durable and precise component designed f...

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Rinnai FOT-151

Rinnai Vent Kit A 4.5"–9.5" For Direct Vent Tankless Water Heaters

SKU: FOT-151
Product ID: 60382
$230.02 - $230.02
$230.02
$230.02 - $230.02
$230.02

Product Details Rinnai Vent Kit A 4.5"–9.5" For Direct Vent Tankless Water Heaters FOT-151 The Rinnai FOT-151 Vent Kit A is a compact venting so...

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Rinnai FOT-103

Rinnai 21" To 40" Vent Extension Set For Wall Furnaces ES38C

SKU: FOT-103
Product ID: 60381
$315.88 - $315.88
$315.88
$315.88 - $315.88
$315.88

Product Details Rinnai 21" To 40" Vent Extension Set For Wall Furnaces ES38C FOT-103 The Rinnai FOT-103 Vent Extension Kit is designed to e...

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Rinnai FOT-156

Rinnai 21" To 40" Vent Extension Set For Wall Furnaces EX11C

SKU: FOT-156
Product ID: 60377
$292.56 - $292.56
$292.56
$292.56 - $292.56
$292.56

Product Details Rinnai 21" To 40" Vent Extension Set For Wall Furnaces EX11C FOT-156 The Rinnai FOT-156 Vent Extension Kit is designed to...

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Rinnai FOT-152

Rinnai Vent Kit B 9.5"–15.75" For Direct Vent Tankless Water Heaters

SKU: FOT-152
Product ID: 60376
$308.46 - $308.46
$308.46
$308.46 - $308.46
$308.46

Product Details Rinnai Vent Kit B 9.5"–15.75" For Direct Vent Tankless Water Heaters FOT-152 The Rinnai FOT-152 Vent Kit B is a compact...

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Rinnai FOT-219

Rinnai 11" To 20" Vent Extension Set For Wall Furnaces EX17C/EX22

SKU: FOT-219
Product ID: 60375
$256.52 - $256.52
$256.52
$256.52 - $256.52
$256.52

Product Details Rinnai 11" To 20" Vent Extension Set For Wall Furnaces EX17C/EX22 FOT-219 The Rinnai FOT-219 Vent Extension Kit is ...

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Rinnai FOT-153

Rinnai Vent Kit C 15.75"–23.6" For Direct Vent Tankless Water Heaters

SKU: FOT-153
Product ID: 60373
$308.46 - $308.46
$308.46
$308.46 - $308.46
$308.46

Product Details Rinnai Vent Kit C 15.75"–23.6" For Direct Vent Tankless Water Heaters FOT-153 The Rinnai FOT-153 Vent Kit C is a high-qua...

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Rinnai FOT-157

Rinnai 60" To 80" Vent Extension Set For Wall Furnaces EX11C

SKU: FOT-157
Product ID: 60372
$360.40 - $360.40
$360.40
$360.40 - $360.40
$360.40

Product Details Rinnai 60" To 80" Vent Extension Set For Wall Furnaces EX11C FOT-157 The Rinnai FOT-157 Vent Extension Kit is designed to...

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Rinnai FOT-155

Rinnai 11" To 20" Vent Extension Set For Wall Furnaces EX11C

SKU: FOT-155
Product ID: 60371
$200.34 - $200.34
$200.34
$200.34 - $200.34
$200.34

Product Details Rinnai 11" To 20" Vent Extension Set For Wall Furnaces EX11C FOT-155 The Rinnai FOT-155 Vent Extension Kit is designed to...

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Rinnai FOT-201

Rinnai Extension Kit Long Bent Elbow For Direct-Vent Wall Furnaces

SKU: FOT-201
Product ID: 60370
$162.18 - $162.18
$162.18
$162.18 - $162.18
$162.18

Product Details Rinnai Extension Kit Long Bent Elbow for Direct-Vent Wall Furnaces FOT-201 The Rinnai FOT-201 Extension Kit Long Bent Elbow...

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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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