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Tankless Water Heaters

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Rinnai RX199iN

Rinnai 199,000 BTU Water Heater Tankless Condensing Natural Or Propane Gas

SKU: RX199iN
Product ID: 110770
$1,703.10 - $1,703.10
$1,703.10
$1,703.10 - $1,703.10
$1,703.10

Product Details Rinnai 199,000 BTU Water Heater Tankless Condensing Natural Or Propane Gas RX199iN The SENSEI™ RX199iN condensing tankless water h...

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Rinnai RXP199iN

Rinnai 199000 BTU Water Heater Tankless Condensing NG/LP Indoor/Outdoor

SKU: RXP199iN
Product ID: 110774
$2,067.80 - $2,067.80
$2,067.80
$2,067.80 - $2,067.80
$2,067.80

Product Details Rinnai 199000 BTU Water Heater Tankless Condensing NG/LP Indoor/Outdoor RXP199iN The SENSEI™ RXP199iN condensing tankless water he...

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Rinnai RX160iN

Rinnai 160000 BTU Water Heater Tankless NG/LP Condensing Indoor/Outdoor

SKU: RX160iN
Product ID: 110768
$1,442.70 - $1,442.70
$1,442.70
$1,442.70 - $1,442.70
$1,442.70

Product Details Rinnai 160000 BTU Water Heater Tankless NG/LP Condensing Indoor/Outdoor RX160iN The SENSEI® RX160iN condensing tankless water heat...

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Rinnai CX199iN

Rinnai 199K BTU Water Heater Tankless Natural/Propane Gas Condensing Indoor

SKU: CX199iN
Product ID: 110636
$1,752.80 - $1,752.80
$1,752.80
$1,752.80 - $1,752.80
$1,752.80

Product Details Rinnai 199K BTU Water Heater Tankless Natural/Propane Gas Condensing Indoor CX199iN The Rinnai SENSEI™ CX Series is built for the ...

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Rinnai RE160EN

Rinnai 160,000 BTU Water Heater Tankless Natural Gas Non-Condensing Outdoor

SKU: RE160EN
Product ID: 110720
$992.60 - $992.60
$992.60
$992.60 - $992.60
$992.60

Product Details Rinnai 160,000 BTU Water Heater Tankless Natural Gas Non-Condensing Outdoor RE160EN The Rinnai RE160eN delivers the perfect combin...

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Rinnai RE140EP

Rinnai 140,000 BTU Water Heater Tankless Propane Gas Non-Condensing Outdoor

SKU: RE140EP
Product ID: 110717
$884.10 - $884.10
$884.10
$884.10 - $884.10
$884.10

Product Details Rinnai 140,000 BTU Water Heater Tankless Propane Gas Non-Condensing Outdoor RE140EP The Rinnai RE140eP combines high efficiency, c...

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Rinnai RXP160iN

Rinnai 160000 BTU Water Heater Tankless Condensing NG/LP Indoor/Outdoor

SKU: RXP160iN
Product ID: 110773
$1,685.60 - $1,685.60
$1,685.60
$1,685.60 - $1,685.60
$1,685.60

Product Details Rinnai 160000 BTU Water Heater Tankless Condensing NG/LP Indoor/Outdoor RXP160iN The SENSEI™ RXP160iN condensing tankless water he...

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Rinnai RX180iN

Rinnai 180000 BTU Water Heater Tankless NG/LP Condensing Indoor/Outdoor

SKU: RX180iN
Product ID: 110769
$1,566.60 - $1,566.60
$1,566.60
$1,566.60 - $1,566.60
$1,566.60

Product Details Rinnai 180000 BTU Water Heater Tankless NG/LP Condensing Indoor/Outdoor RX180iN The SENSEI® RX180iN condensing tankless water heat...

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Rinnai V53DEP

Rinnai 120,000 BTU Propane Tankless Heater Outdoor High Efficiency 120V

SKU: V53DEP
Product ID: 110807
$741.65 - $741.65
$741.65
$741.65 - $741.65
$741.65

Product Details Rinnai 120,000 BTU Propane Tankless Heater Outdoor High Efficiency 120V V53DeP The Rinnai Value Series V53De Tankless Water...

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Rinnai RE199IN

Rinnai 199,000 BTU Water Heater Tankless Natural Gas Non-Condensing Indoor

SKU: RE199IN
Product ID: 110730
$1,423.10 - $1,423.10
$1,423.10
$1,423.10 - $1,423.10
$1,423.10

Product Details Rinnai 199,000 BTU Water Heater Tankless Natural Gas Non-Condensing Indoor RE199IN The Rinnai RE199iN combines high efficiency, co...

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Rinnai RE199EP

Rinnai 199,000 BTU Water Heater Tankless Propane Gas Non-Condensing Outdoor

SKU: RE199EP
Product ID: 110729
$1,423.10 - $1,423.10
$1,423.10
$1,423.10 - $1,423.10
$1,423.10

Product Details Rinnai 199,000 BTU Water Heater Tankless Propane Gas Non-Condensing Outdoor RE199EP The Rinnai RE199eP delivers the perfect combin...

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Rinnai RE160EP

Rinnai 160,000 BTU Water Heater Tankless Propane Gas Non-Condensing Outdoor

SKU: RE160EP
Product ID: 110721
$992.60 - $992.60
$992.60
$992.60 - $992.60
$992.60

Product Details Rinnai 160,000 BTU Water Heater Tankless Propane Gas Non-Condensing Outdoor RE160EP The Rinnai RE160eP delivers the perfect combin...

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Rinnai RE140IP

Rinnai 140,000 BTU Water Heater Tankless Propane Gas Non-Condensing Indoor

SKU: RE140IP
Product ID: 110719
$884.10 - $884.10
$884.10
$884.10 - $884.10
$884.10

Product Details Rinnai 140,000 BTU Water Heater Tankless Propane Gas Non-Condensing Indoor RE140IP The Rinnai RE140iP combines high efficiency, co...

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Rinnai RX130iN

Rinnai 130000 BTU Water Heater Tankless NG/LP Condensing Indoor/Outdoor

SKU: RX130iN
Product ID: 110767
$1,264.20 - $1,264.20
$1,264.20
$1,264.20 - $1,264.20
$1,264.20

Product Details Rinnai 130000 BTU Water Heater Tankless NG/LP Condensing Indoor/Outdoor RX130iN The SENSEI® RX130iN condensing tankless water heat...

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Rinnai REP160IP

Rinnai 160,000 BTU Water Heater Tankless Propane Gas Non-Condensing Indoor

SKU: REP160IP
Product ID: 110740
$1,129.10 - $1,129.10
$1,129.10
$1,129.10 - $1,129.10
$1,129.10

Product Details Rinnai 160,000 BTU Water Heater Tankless Propane Gas Non-Condensing Indoor REP160IP Effortlessly meet hot water demands with the R...

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Rinnai REP160IN

Rinnai 160,000 BTU Water Heater Tankless Natural Gas Non-Condensing Indoor

SKU: REP160IN
Product ID: 110739
$1,129.10 - $1,129.10
$1,129.10
$1,129.10 - $1,129.10
$1,129.10

Product Details Rinnai 160,000 BTU Water Heater Tankless Natural Gas Non-Condensing Indoor REP160IN Improve your lifestyle by never running out of...

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Rinnai REP160EP

Rinnai 160,000 BTU Water Heater Tankless Propane Gas Non-Condensing Outdoor

SKU: REP160EP
Product ID: 110738
$1,129.10 - $1,129.10
$1,129.10
$1,129.10 - $1,129.10
$1,129.10

Product Details Rinnai 160,000 BTU Water Heater Tankless Propane Gas Non-Condensing Outdoor REP160EP The Rinnai REP160eP combines high efficiency,...

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Rinnai REP160EN

Rinnai 160,000 BTU Water Heater Tankless Natural Gas Non-Condensing Outdoor

SKU: REP160EN
Product ID: 110737
$1,129.10 - $1,129.10
$1,129.10
$1,129.10 - $1,129.10
$1,129.10

Product Details Rinnai 160,000 BTU Water Heater Tankless Natural Gas Non-Condensing Outdoor REP160EN Improve your lifestyle with the Rinnai REP160...

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Rinnai RE199IP

Rinnai 199,000 BTU Water Heater Tankless Propane Gas Non-Condensing Indoor

SKU: RE199IP
Product ID: 110731
$1,423.10 - $1,423.10
$1,423.10
$1,423.10 - $1,423.10
$1,423.10

Product Details Rinnai 199,000 BTU Water Heater Tankless Propane Gas Non-Condensing Indoor RE199IP The Rinnai RE199iP delivers the perfect combina...

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Rinnai RE199EN

Rinnai 199,000 BTU Water Heater Tankless Natural Gas Non-Condensing Outdoor

SKU: RE199EN
Product ID: 110728
$1,423.10 - $1,423.10
$1,423.10
$1,423.10 - $1,423.10
$1,423.10

Product Details Rinnai 199,000 BTU Water Heater Tankless Natural Gas Non-Condensing Outdoor RE199EN The Rinnai RE199eN combines high efficiency, c...

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Rinnai RE180IP

Rinnai 180,000 BTU Water Heater Tankless Propane Gas Non-Condensing Indoor

SKU: RE180IP
Product ID: 110727
$1,212.40 - $1,212.40
$1,212.40
$1,212.40 - $1,212.40
$1,212.40

Product Details Rinnai 180,000 BTU Water Heater Tankless Propane Gas Non-Condensing Indoor RE180IP The Rinnai RE180iP offers the ideal combination...

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Rinnai RE180IN

Rinnai 180,000 BTU Water Heater Tankless Natural Gas Non-Condensing Indoor

SKU: RE180IN
Product ID: 110726
$1,212.40 - $1,212.40
$1,212.40
$1,212.40 - $1,212.40
$1,212.40

Product Details Rinnai 180,000 BTU Water Heater Tankless Natural Gas Non-Condensing Indoor RE180IN The Rinnai RE180iN delivers the perfect balance...

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Rinnai RE180EP

Rinnai 180,000 BTU Water Heater Tankless Propane Gas Non-Condensing Outdoor

SKU: RE180EP
Product ID: 110725
$1,212.40 - $1,212.40
$1,212.40
$1,212.40 - $1,212.40
$1,212.40

Product Details Rinnai 180,000 BTU Water Heater Tankless Propane Gas Non-Condensing Outdoor RE180EP The Rinnai RE180eP delivers the perfect combin...

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Rinnai RE180EN

Rinnai 180,000 BTU Water Heater Tankless Natural Gas Non-Condensing Outdoor

SKU: RE180EN
Product ID: 110724
$1,212.40 - $1,212.40
$1,212.40
$1,212.40 - $1,212.40
$1,212.40

Product Details Rinnai 180,000 BTU Water Heater Tankless Natural Gas Non-Condensing Outdoor RE180EN The Rinnai RE180eN combines high efficiency, c...

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HVAC Store provides a selection of premium tankless water heaters engineered for high-demand residential and light-commercial applications. These systems are selected for their technical reliability, precise BTU/GPM ratings, and versatile venting configurations that meet modern building codes. By focusing on gas-fired technology from established manufacturers, we ensure that contractors and homeowners can match a specific model to a building's peak hot water load with technical precision.

Continuous Hot Water with Compact, High‑Efficiency Design

Tankless technology utilizes high-output burners and high-performance heat exchangers to heat water instantly as it flows through the unit. This demand-based heating eliminates the standby energy losses associated with traditional storage tanks, contributing to a more sustainable and energy-efficient mechanical system. Our collection features multiple input capacities, including 140,000, 160,000, 180,000, and 199,000 BTU models, which provide specific Gallons Per Minute (GPM) outputs tailored to multiple simultaneous fixtures.


We offer both natural gas and propane configurations in non-condensing and high-efficiency condensing designs. Condensing models utilize a secondary heat exchanger to capture latent heat from combustion gases, achieving superior thermal efficiency. With both indoor and outdoor-mounted options available, these units offer flexibility for various gas piping and electrical layouts. When sized to the local groundwater temperature and required temperature rise, these systems provide a continuous hot water supply while reducing long-term utility overhead.

Choosing the Right Tankless Water Heaters for Your Home or Business

  • Determine Fuel Source and Location: Select between natural gas and propane models, then identify the optimal installation site—indoor or outdoor—based on venting paths and combustion air requirements.

  • Match BTU Input to GPM Demand: Use the BTU rating to determine the maximum GPM flow; higher BTU units are the leading choice for homes with multiple showers or high-capacity appliances running simultaneously.

  • Evaluate Condensing Technology: Choose condensing gas models for projects requiring the highest energy efficiency and lower vent temperatures or non-condensing models for simpler retrofit applications.

  • Verify Installation Infrastructure: Coordinate with a licensed professional to ensure gas line sizing, flue materials, and electrical connections meet the manufacturer's specific requirements and local codes.

  • Plan for Maintenance and Warranty: To maintain comprehensive warranty coverage, factor in periodic descaling and filter maintenance to protect the heat exchanger from mineral build-up.

Related Collections for Complete Hot Water and Heating Solutions

 

FAQ

How does tankless heating differ from traditional storage tanks?

Tankless units function as "on-demand" heaters, activating only when a hot water tap is opened. Cold water enters the unit and is instantly heated by the burner as it passes through the heat exchanger, providing a continuous supply of hot water without the energy waste of keeping a large tank heated 24/7.

Are gas tankless water heaters more energy-efficient?

Yes. By eliminating standby heat loss and utilizing innovative condensing technology, these units significantly reduce fuel consumption. According to the U.S. Department of Energy, properly sized tankless systems are a sustainable alternative that can lower annual operating costs compared to conventional storage heaters.

How is a tankless water heater properly sized?

Sizing is based on two factors: the total GPM required for simultaneous fixtures (showers, dishwashers, etc.) and the "temperature rise" needed to heat the incoming groundwater to the desired setpoint. Our team can help cross-reference these specs to ensure you select a tailored solution for your climate.

Can one unit provide hot water for multiple appliances at once?

Yes, provided the combined GPM demand does not exceed the unit's rated capacity for your region. Higher-BTU models, such as our 199,000 BTU units, are designed to support larger residences and multiple bathrooms without a drop in water temperature.

What are the primary installation requirements?

Installation involves high-capacity gas supply lines, specific stainless steel or PVC venting (depending on the model), and a dedicated electrical circuit for the control board. For safe operation and to preserve your comprehensive warranty coverage, we recommend installation by a licensed plumber or HVAC contractor.

What maintenance is required for long-term performance?

To ensure reliable operation, tankless units should be flushed annually to remove scale and mineral deposits, particularly in areas with hard water. Regular inspection of the air filters and venting systems will also help maintain the system’s rated efficiency and lifespan.

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