6 Best Alternatives to the Rinnai RUR160EP Condensing Tankless Hot (2026)

How these units differ from the Rinnai

Rinnai Indoor Propane Condensing Tankless Water Heater

The Rinnai RSC160iP shifts your installation from outdoor to indoor use while maintaining the same 9 GPM flow rate. It uses propane and condensing venting like the original model, but its compact dimensions allow placement in tighter spaces. This unit includes Smart-Circ technology for efficient recirculation scheduling, which helps reduce energy waste compared to the original's fixed thermal bypass. You gain flexibility in where you install the heater, making it suitable for garages or utility rooms where outdoor exposure is not an option. The trade-off is the need for proper indoor venting infrastructure. This model is ideal if you need high flow but must move the unit inside.

Takagi Outdoor Propane Tankless Water Heater

The Takagi T-H3S-OS-P offers 8 GPM flow, which is slightly lower than the Rinnai's 9 GPM. It retains the outdoor propane and condensing venting setup, making it a direct physical replacement for many existing installations. The unit is lighter at 69 pounds and has a different footprint, measuring 17.8 inches wide by 24.9 inches high. You lose one gallon per minute of peak flow, which may affect simultaneous use in larger homes. However, it provides strong performance for most households while maintaining strict emission compliance. This alternative suits you if you prefer a slightly smaller flow capacity but want to keep the same outdoor propane configuration and condensing efficiency.

Takagi 6.6 GPM Propane Outdoor Heater

The Takagi T-H3J-OS-P reduces the flow rate to 6.6 GPM, a significant drop from the Rinnai's 9 GPM. It remains an outdoor propane unit with condensing venting, so installation requirements stay similar. The unit is lighter at 52 pounds and shares the same dimensions as the 8 GPM Takagi model. You sacrifice substantial hot water volume, which may limit simultaneous shower and sink use. This model is best for smaller households or those with lower hot water demands. It offers a compliant outdoor propane solution if you do not need the high output of the original Rinnai. The trade-off is reduced capacity for a more compact, lighter unit.

Camplux 5L Portable Propane Water Heater

The Camplux AY132 is a portable 5L unit designed for camping and RV use, not whole-home heating. It uses propane but lacks the high flow rate of the Rinnai, providing only about 1.3 GPM. The unit is extremely lightweight at 10 pounds and measures just 11.4 inches wide. It includes overheat protection for safety during temporary use. You give up permanent installation and high capacity for portability and off-grid capability. This heater is suitable for outdoor showers, camping trips, or RV adventures. It is not a replacement for your home water system. Choose this if you need a lightweight, CSA-certified solution for temporary hot water needs away from home.

Camplux 2.11 GPM Portable Outdoor Propane Water Heater

The Camplux BW211 is another portable propane heater with a 2.11 GPM flow rate, far below the Rinnai's 9 GPM. It is designed for camping and outdoor use, weighing 19 pounds. The unit is CSA-approved for safety but lacks the infrastructure for permanent home installation. You trade high capacity and indoor convenience for a compact, lightweight device suitable for hunters or campers. The dimensions are 12.6 inches wide by 20.5 inches high. This model is ideal if you need hot water for outdoor activities rather than household plumbing. It does not offer the consistent, high-volume flow required for whole-home use. Pick this for portable, temporary hot water needs.

VEVOR 5.3 Gal Outdoor Propane Tankless Heater

The VEVOR JSW38-20L-B is marketed for whole-house outdoor propane heating, but its specifications differ significantly from the Rinnai. It weighs 29.1 pounds and measures 15 inches wide by 23.2 inches high. The unit offers precise control and stability features, though it lacks the smart connectivity of the newer Rinnai models. You may find different flow characteristics and control interfaces compared to the original. This heater is suitable for users who prioritize safety and stability over smart features. It is an outdoor propane unit, matching the original's fuel and placement. Choose this if you need a whole-house solution but prefer a unit with different control mechanisms and a lighter build.

Quick picks

Our 7 picks

1 Best overall

Rinnai 9 GPM Outdoor Propane Condensing Heater

Best for: outdoor propane homes needing high flow

Fuel Type

Propane

Flow Rate

9 GPM

Installation Location

Outdoor

Dimensions

33.9 x 14.8 x 22.1 inches

Venting Type

Condensing

Weight

80.9 pounds

View on Amazon: Rinnai 9 GPM Outdoor Propane Condensing Heater

The Rinnai RUR160EP is a condensing propane tankless water heater designed for outdoor installation. It delivers 9 GPM of hot water, making it suitable for multiple simultaneous uses. Key features include ThermaCirc360 technology with a built-in recirculation pump and thermal bypass valve, which helps reduce wait times without a dedicated return line. It offers WiFi monitoring for remote status checks. Note that this specific model is discontinued.

Pros

• 9 GPM flow rate for strong hot water output
• Built-in recirculation pump and thermal bypass valve
• WiFi monitoring capability for remote status checks
• Condensing design for high energy efficiency

Cons

• Discontinued model; replaced by RSC160eP
• Heavier at 80.9 pounds than some alternatives
• Outdoor installation only, limiting placement options

Good fit if

• You need a high-flow propane unit for outdoor use
• You want built-in recirculation without extra piping
• You prefer WiFi monitoring for system status

Skip if

• You require indoor installation capabilities
• You need a currently manufactured model
• You are using natural gas instead of propane

Verdict: Rinnai RUR160EP 9 GPM Propane Outdoor provides reliable high-flow performance with convenient recirculation features, making it a strong option for outdoor propane setups, though its discontinued status means the newer RSC160eP is the current recommendation.

2 Best premium

Rinnai Indoor Propane Condensing Tankless Water Heater

Best for: indoor high-flow propane needs with smart efficiency

Fuel Type

Propane

Flow Rate

Up to 9 GPM

BTU

160,000 BTU

Installation Location

Indoor

Dimensions

9 x 9 x 9 inches

Venting Type

Condensing

View on Amazon: Rinnai Indoor Propane Condensing Tankless Water Heater

The Rinnai RSC160iP is a compact indoor condensing propane water heater delivering up to 9 GPM. It features Smart-Circ technology that learns your usage patterns to schedule recirculation for better efficiency. With a 160,000 BTU output and ENERGY STAR qualification, it suits homes needing high flow in a small footprint. You get intelligent control over hot water delivery without the waste of constant recirculation.

Pros

• Up to 9 GPM flow rate for multiple fixtures
• Smart-Circ technology learns usage patterns for efficiency
• Compact 9x9x9 inch design fits tight spaces
• ENERGY STAR qualified with 0.110 Uniform Energy Factor

Cons

• Indoor installation only, limiting outdoor placement options
• WiFi control module is not included with the unit
• Heavier at 78 pounds compared to portable alternatives

Good fit if

• You need high flow rates in a compact indoor space
• You want to reduce energy waste with smart recirculation
• You are replacing a standard propane tankless unit

Skip if

• You require outdoor installation for this unit
• You want built-in WiFi control without extra purchases
• You need a portable solution for camping

Verdict: Rinnai RSC160iP Smart-Circ Propane Heater is ideal for homeowners who need reliable 9 GPM output in a tight indoor space and value energy savings through smart recirculation scheduling.

3 Best 8 gallon

Takagi Outdoor Propane Tankless Water Heater

Best for: outdoor propane users needing 8 GPM

Fuel Type

Propane

Flow Rate

8 GPM

Installation Location

Outdoor

Dimensions

24.9 x 17.8 x 11.3 in

Venting Type

Condensing

Capacity

8 Gallon

View on Amazon: Takagi Outdoor Propane Tankless Water Heater

This Takagi unit delivers 8 gallons per minute of hot water using propane fuel. It is designed for outdoor installation and features condensing technology for high efficiency. The compact build measures 24.9 by 17.8 inches and weighs 69 pounds. It meets strict emission standards for ultra-low NOx output. You get on-demand heating without a standing pilot light. This model suits outdoor spaces where propane is available.

Pros

• 8 GPM flow rate
• Condensing high efficiency
• Ultra-low NOx emissions
• No pilot light required

Cons

• Outdoor installation only
• Heavier than some competitors
• No smart connectivity listed

Good fit if

• You need high flow for outdoor use
• You have propane access
• You want ultra-low emissions

Skip if

• You need indoor installation
• You require WiFi control
• You use natural gas

Verdict: Takagi 8 GPM Propane Outdoor Heater provides strong flow for outdoor setups. It fits users needing propane power and strict emission compliance.

4 Best budget

Takagi 6.6 GPM Propane Outdoor Heater

Best for: outdoor propane heating with emission standards

Fuel Type

Propane

Flow Rate

6.6 GPM

Installation Location

Outdoor

Dimensions

24.9 x 17.8 x 11.3 in

Venting Type

Condensing

Capacity

4.0 Gallons

View on Amazon: Takagi 6.6 GPM Propane Outdoor Heater

This Takagi unit delivers 6.6 GPM of hot water using propane. It measures 24.9 by 17.8 by 11.3 inches and weighs 52 pounds. The condensing design meets Ultra-Low NOx emission standards. You get on-demand heating without a standing pilot light. It fits outdoor installations where space is limited but flow rate matters more than the highest capacity.

Pros

• 6.6 GPM flow rate for steady hot water
• Condensing technology for high efficiency
• Ultra-Low NOx emissions compliance
• No standing pilot light reduces standby loss

Cons

• Lower flow rate than the 9 GPM Rinnai RUR160EP
• Outdoor-only installation limits placement options
• Heavier at 52 pounds than portable competitors

Good fit if

• You need a reliable outdoor propane heater
• You require Ultra-Low NOx emissions compliance
• You prefer a fixed indoor or outdoor unit over portable models

Skip if

• You need a flow rate above 7 GPM
• You require indoor installation capability
• You want a portable unit for camping

Verdict: Takagi 6.6 GPM Propane Outdoor Heater suits you if you need a compliant outdoor unit with moderate flow. It offers efficiency and emissions control, though it lacks the high capacity of the top Rinnai model.

5 Best rv

Camplux 5L Portable Propane Water Heater

Best for: camping and off-grid showers

Fuel Type

Propane

Flow Rate

1.32 GPM

Installation Location

Outdoor

Certification

CSA

Dimensions

4.33 x 11.4 x 14.8 inches

Use

Camping, RV

View on Amazon: Camplux 5L Portable Propane Water Heater

This Camplux unit is a compact, outdoor propane water heater designed for camping and RV use. It delivers 1.32 GPM of instant hot water without needing electricity. The lightweight 10 lb build and low-pressure start make it ideal for off-grid scenarios. It features CSA certification and overheat protection for safe operation. You get a stable shower experience in remote locations using just a small pump or gravity feed.

Pros

• Weighs only 10 lbs with a folding handle for easy portability
• Starts with just 3.0 PSI water pressure for off-grid use
• CSA certified with 6-in-1 safety protections including overheat checks
• Provides 1.32 GPM flow rate for instant hot water

Cons

• Low 1.32 GPM flow rate limits simultaneous fixture use
• Requires manual battery power for ignition and controls
• Outdoor-only installation restricts indoor placement options

Good fit if

• You need a lightweight heater for camping trips
• You are setting up an off-grid shower system
• You want a CSA certified unit for RV use

Skip if

• You require high flow rates for multiple bathrooms
• You need an indoor-rated water heater
• You want electric ignition without batteries

Verdict: Camplux 5L Portable Propane Heater is a specialized tool for campers and RVers who prioritize portability and off-grid capability. It fits buyers who need a lightweight, CSA-certified solution for temporary outdoor showers rather than a permanent home installation.

6 Also great

Camplux 2.11 GPM Portable Outdoor Propane Water Heater

Best for: camping and outdoor portable use

Fuel Type

Propane

Flow Rate

2.11 GPM

BTU

55,000 BTU/hr

Installation Location

Outdoor

Temperature Control

18-95 °F

Certification

CSA

View on Amazon: Camplux 2.11 GPM Portable Outdoor Propane Water Heater

This portable unit delivers 2.11 GPM at 55,000 BTU for outdoor use. It runs on a standard 20 lb propane tank and features electronic ignition powered by two D-cell batteries. The temperature range spans 18 to 95 °F. It includes six safety protections and CSA approval. This model suits camping, hunting, or remote cabin needs where fixed plumbing is unavailable.

Pros

• 2.11 GPM maximum flow rate
• 55,000 BTU/hr power output
• CSA safety approval
• Six built-in safety protections
• Lightweight 19 lb design

Cons

• Lowest operating water pressure is 3.6 PSI
• Temperature range maxes at 95 °F
• Requires two D-cell batteries for ignition

Good fit if

• You need hot water for camping or hiking
• You require a portable solution for remote locations
• You want CSA-approved safety features

Skip if

• You need indoor installation
• You require high water pressure operation
• You need temperatures above 95 °F

Verdict: Camplux BW211 Portable Propane Heater is a compact, CSA-approved option for outdoor hot water needs. It fits campers and hunters who prioritize portability and safety over high flow rates or indoor utility.

7 Best whole house

VEVOR 5.3 Gal Outdoor Propane Tankless Heater

Best for: outdoor whole-house propane heating

Fuel Type

Propane

BTU

120,000 BTU/h

Installation Location

Outdoor

Temperature Control

±1°F

Dimensions

23.2 x 15 x 15 inches

Use

Whole House

View on Amazon: VEVOR 5.3 Gal Outdoor Propane Tankless Heater

This outdoor propane unit delivers 120,000 BTU/h for whole-house use. It features ±1°F precision temperature control to maintain consistent heat. The system includes a 32.8ft wired control panel for remote adjustment. You get multiple safety protections against overheating and leaks. It connects via standard 3/4 inch NPT fittings. This model suits those needing reliable, instant hot water in outdoor settings.

Pros

• 120,000 BTU/h heating capacity
• ±1°F precision temperature control
• 32.8ft wired control panel included
• Multiple safety protections included

Cons

• Wired control panel requires proximity
• No smart app connectivity listed
• Larger footprint than compact units

Good fit if

• You need whole-house hot water outdoors
• You want precise temperature stability
• You prefer wired control over wireless

Skip if

• You need indoor installation only
• You require smart app control
• You have limited wall space

Verdict: VEVOR 5.3 Gal Propane Tankless Heater offers high output and precise control for outdoor whole-house needs. It fits users who value stability and safety features over smart connectivity.

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Frequently asked questions

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