Looking Beyond the Noritz NR66ODLP Outdoor Tankless Water Heater? 6 Alternatives Worth a Look
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If you are shopping for noritz nr66odlp outdoor tankless water heater alternatives, you likely want to compare your exterior propane options before making a decision. The Noritz NR66ODLP performs well for outdoor installations, offering a 6.6 GPM flow rate and a 140,000 BTU heating capacity. Its 36-pound exterior cabinet mounts on an outside wall, which supplies steady hot water without demanding indoor venting runs or interior floor space.
However, your setup might require different dimensions, brand engineering, or specific hardware features. For example, you might look for built-in recirculation loops, a lighter portable design for off-grid travel, or alternate brands such as Rinnai and A. O. Smith. We chose these 6 alternatives because their specifications overlap with the original Noritz profile. Every model on this list uses propane and mounts outdoors, giving you comparable heating solutions tailored to your household flow demands and available exterior space.
Our top pick: Noritz 6.6 GPM Outdoor Liquid Propane Tankless Heater.
Comparing Alternative Outdoor Propane Water Heaters
Rinnai 6.1 GPM Outdoor Propane Water Heater
The Rinnai REU-VE2125WD-US-P offers outdoor propane heating with non-condensing operation and digital diagnostics. At 14.1 inches wide and 24.6 inches high, it has a narrower profile than the Noritz NR66ODLP, which measures 17.6 inches wide and 26.6 inches high. This smaller footprint helps when you have limited exterior wall space. However, you give up lightweight handling. The Rinnai weighs 49.2 pounds, making it over 13 pounds heavier than the 36-pound Noritz cabinet. It also comes in a silver finish rather than the unfinished exterior of the Noritz. You should choose this Rinnai model if you want digital troubleshooting displays and a compact wall width for multi-fixture outdoor propane setups.
A. O. Smith 6.6 GPM Outdoor Propane Tankless Water Heater
The A. O. Smith ATO-140H 101 matches the 6.6 GPM capacity of the Noritz NR66ODLP while introducing dual-metal heat exchangers and integrated safety sensors. Its casing is shorter and narrower at 22.9 inches high and 13.9 inches wide, compared to the 26.6-inch height and 17.6-inch width of the Noritz. What you give up is raw burner power and manageable weight. The A. O. Smith produces 120,000 BTU, which is 20,000 BTU lower than the 140,000 BTU Noritz burner. It also weighs 52 pounds, adding 16 pounds over the 36-pound Noritz. Pick the A. O. Smith if you prioritize built-in safety monitoring and heat exchanger construction over the higher heating output of the Noritz.
Rinnai Smart-Circ 6.1 GPM Propane Heater
The Rinnai REU-VEP2125WD-US-P adds integrated Smart-Circ recirculation scheduling directly inside the outdoor unit. With the Noritz NR66ODLP, continuous circulation requires adding external pump hardware. The Rinnai also saves exterior wall width, measuring 14.1 inches wide versus 17.6 inches on the Noritz. The tradeoff is installation heft. At 56.6 pounds, this Rinnai heater is 20.6 pounds heavier than the 36-pound Noritz, requiring sturdier mounting support. Its depth of 10.8 inches closely mirrors the 10.7-inch depth of the Noritz. You should choose this Rinnai model if you want built-in recirculation management without plumbing separate external pumps, provided you can accommodate the heavier unit on your mounting wall.
Camplux 5L Portable Propane Water Heater
The Camplux AY132 is engineered for portable off-grid use rather than permanent residential mounting. Weighing only 10 pounds and measuring 11.4 by 4.33 by 14.8 inches, it is far more compact and portable than the 36-pound, 26.6-inch-tall Noritz NR66ODLP. It operates on battery power, features overheat protection, and starts with just 3.0 PSI of water pressure. However, you sacrifice whole-home capacity. Its 1.32 GPM delivery is a fraction of the 6.6 GPM and 140,000 BTU output supplied by the Noritz. You should select the Camplux AY132 if you need a lightweight heater for camping, RV trips, or off-grid outdoor showers where high flow and electrical hookups are unnecessary.
VEVOR 5.3 Gal Outdoor Propane Tankless Heater
The VEVOR JSW38-20L-B provides exterior propane heating with precise ±1°F temperature regulation and an included 32.8-foot wired control panel for remote management. It weighs 29.1 pounds, making it nearly seven pounds lighter than the 36-pound Noritz NR66ODLP. It is also shorter at 23.2 inches compared to the 26.6-inch Noritz. In exchange, you give up burner strength and water volume. The VEVOR delivers 120,000 BTU/h and a 5.3-gallon rating, trailing the 140,000 BTU and 6.6 GPM ratings of the Noritz. Its 15-inch depth also extends further out from the wall than the 10.7-inch Noritz. Choose the VEVOR if you want remote wired temperature adjustments and lighter hardware for moderate whole-house demand.
Camplux 2.11 GPM Portable Outdoor Propane Water Heater
The Camplux BW211 targets mobile camping installations rather than permanent whole-home utility. At 19 pounds, it weighs nearly half as much as the 36-pound Noritz NR66ODLP, and its 12.6-inch width is five inches narrower than the 17.6-inch Noritz frame. It operates using battery ignition and features low water pressure activation, allowing it to function without grid electricity or high municipal pressure. You give up the continuous high-volume performance of the Noritz, dropping from 6.6 GPM to 2.11 GPM. The Noritz also provides 140,000 BTU heating for multiple fixtures at once. Pick the Camplux BW211 if you need an easily transportable propane heater for outdoor washing or camping instead of fixed residential plumbing.
Quick picks
Our 7 picks
Noritz 6.6 GPM Outdoor Liquid Propane Tankless Heater
Best for: high-demand outdoor liquid propane setups
- Fuel Type
- Liquid Propane
- Flow Rate
- 6.6 Gpm
- BTU
- 140,000 Btuh
- Installation Location
- Outdoor
- Dimensions
- 26.6 x 17.6 x 10.7 inches
- Weight
- 36 pounds
View on Amazon: Noritz 6.6 GPM Outdoor Liquid Propane Tankless Heater
This Noritz outdoor propane tankless water heater delivers up to 6.6 GPM using a 140,000 BTU burner. Designed strictly for exterior mounting, it frees up indoor utility space while venting directly outdoors. At 36 pounds and roughly 27 inches tall, it provides whole-home hot water without requiring an indoor flue run. It suits you if you have an exterior liquid propane supply and need high outdoor capacity across multiple simultaneous fixtures.
Pros
- Delivers up to 6.6 GPM flow rate
- High-output 140,000 BTU burner
- Outdoor installation requires no indoor venting
- Low NOx operation
Cons
- Outdoor installation only; not rated for indoor mounting
- Configured strictly for liquid propane fuel
- Lists no exterior finish coating
Good fit if
- You need up to 6.6 GPM of hot water from an outdoor unit.
- You run your utilities on liquid propane.
- You want a 140,000 BTU exterior heater to avoid indoor vent piping.
Skip if
- You require an indoor water heater.
- You need a natural gas connection instead of propane.
Verdict: Noritz Outdoor Propane Tankless Water Heater, 6.6 GPM provides substantial 140,000 BTU performance for exterior mounting setups. It is an effective whole-home solution when you run liquid propane and want to avoid indoor venting runs.
Rinnai 6.1 GPM Outdoor Propane Water Heater
Best for: outdoor propane homes needing multi-fixture capacity
- Fuel Type
- Propane
- Flow Rate
- 6.1 GPM
- Installation Location
- Outdoor
- Dimensions
- 24.6 x 14.1 x 10.8 in
- Venting Type
- Non-Condensing
- Weight
- 49.2 pounds
The Rinnai 6.1 GPM Outdoor Propane Water Heater is a non-condensing tankless unit designed for exterior wall mounting. It delivers up to 6.1 GPM of hot water, supporting up to five fixtures simultaneously depending on groundwater temperatures. Measuring 24.6 by 14.1 by 10.8 inches and weighing 49.2 pounds, it suits you if you need a permanent outdoor propane setup with integrated LED diagnostics and extensive residential warranty coverage.
Pros
- Delivers up to 6.1 GPM to supply up to five fixtures at once
- Integrated LED screen provides service reminders and diagnostic error codes
- Non-condensing outdoor configuration eliminates indoor exhaust venting requirements
- Offers a 15-year heat exchanger and 5-year parts residential warranty
Cons
- WiFi monitoring requires purchasing the separate Control-R module
- Labor warranty drops from 5 years to 1 year if not registered within 90 days
- Restricted to outdoor propane installation only
Good fit if
- You need to supply up to five fixtures simultaneously from an exterior propane connection.
- You prefer an outdoor wall-mounted installation to avoid indoor venting runs.
- You want built-in digital LED diagnostics for maintenance reminders.
Skip if
- You plan to install the water heater indoors or use natural gas.
- You want built-in WiFi connectivity without purchasing additional hardware.
Verdict: Rinnai 6.1 GPM Outdoor Propane Water Heater provides reliable multi-fixture capacity and clear digital diagnostics for exterior installations. It offers strong warranty backing if registered promptly after professional installation.
Rinnai Smart-Circ 6.1 GPM Propane Heater
Best for: outdoor propane systems needing built-in recirculation
- Fuel Type
- Propane
- Flow Rate
- 6.1 GPM
- Installation Location
- Outdoor
- Dimensions
- 24.6 x 14.1 x 10.8 inches
- Weight
- 56.6 pounds
This outdoor propane tankless water heater delivers up to 6.1 GPM to run up to five fixtures simultaneously. It features an integrated recirculation pump with Smart-Circ logic that tracks usage patterns to schedule hot water cycles. The non-condensing cabinet measures 24.6 inches tall by 14.1 inches wide and mounts outside. It suits you if you need scheduled recirculation without adding external plumbing hardware.
Pros
- Built-in recirculation pump learns usage patterns to schedule circulation
- Provides flow rates up to 6.1 GPM for multiple fixtures
- Compact outdoor footprint measuring 24.6 by 14.1 by 10.8 inches
- Includes a 15-year limited warranty on the heat exchanger
Cons
- WiFi functionality requires purchasing an extra Controlr module
- Labor warranty drops to 1 year unless registered within 90 days
- Designed only for outdoor installation
Good fit if
- You want an outdoor propane water heater with built-in recirculation.
- You need to supply hot water for up to five fixtures at once.
- You have outdoor wall space for a 24.6-inch high unit.
Skip if
- You require an indoor water heater installation.
- You want factory-integrated WiFi without buying additional modules.
Verdict: Rinnai Smart-Circ 6.1 GPM Propane Heater combines dedicated recirculation scheduling with outdoor propane operation. It is a solid choice if you want continuous circulation without adding external pump accessories.
A. O. Smith 6.6 GPM Outdoor Propane Tankless Water Heater
Best for: outdoor propane multi-fixture residential setups
- Fuel Type
- Propane
- Flow Rate
- 6.6 GPM
- BTU
- 120,000 BTU/hr
- Installation Location
- Outdoor
- Dimensions
- 22.9 x 13.9 x 13.9 inches
- Weight
- 52 pounds
View on Amazon: A. O. Smith 6.6 GPM Outdoor Propane Tankless Water Heater
This A. O. Smith outdoor propane unit delivers up to 6.6 GPM with a 120,000 BTU heating capacity. It uses dual heat exchangers, pairing a commercial-grade copper primary with a corrosion-resistant 316L stainless steel secondary. The compact wall-mount design weighs 52 pounds and fits exterior installations. If you need steady outdoor propane performance to support multiple fixtures without taking up indoor utility room space, this condensing model gives you reliable output.
Pros
- Delivers a maximum flow rate of 6.6 GPM at 120,000 BTU/hr
- Dual heat exchangers featuring primary copper and 316L stainless steel secondary
- Includes overheat cut-off fuse and air-fuel ratio safety sensor
- 15-year limited residential warranty on the heat exchanger
Cons
- Configured strictly for outdoor wall installation
- Capped at 120,000 BTU/hr maximum heating input
Good fit if
- You need up to 6.6 GPM of continuous hot water from an outdoor propane supply.
- You want dual copper and 316L stainless steel heat exchangers for corrosion resistance.
- You prefer exterior wall mounting backed by a 15-year heat exchanger warranty.
Skip if
- You require an indoor water heater installation.
- You need a natural gas connection instead of propane.
- You require heating demand exceeding 120,000 BTU/hr.
Verdict: A. O. Smith 6.6 GPM Outdoor Propane Tankless Water Heater delivers balanced 120,000 BTU performance with dual-metal heat exchangers for dedicated exterior installations. It offers reliable continuous flow if you need an outdoor propane solution backed by robust safety sensors.
Camplux 5L Portable Propane Water Heater
Best for: RV trips, camping, and off-grid outdoor 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
This portable propane water heater provides instant hot water for off-grid setups, camping trips, and RV use. It supplies up to 1.32 GPM of water flow and operates outdoors using two D-size batteries for ignition. It activates with water pressure as low as 3.0 PSI. If you need a lightweight 10-pound unit with an included shower head and gas regulator for outdoor recreation instead of a whole-home system, this heater fits your needs.
Pros
- Weighs 10 pounds with a folding handle for transport
- Ignites at a low water pressure of 3.0 PSI
- Runs without an electrical outlet using 2 D-size batteries
- Comes with an on/off shower head and 5-foot gas regulator
Cons
- Maximum flow rate is limited to 1.32 GPM
- Restricted to outdoor installation only
- Requires periodic replacement of 2 D-size batteries
Good fit if
- You need a compact, portable water heater for an RV, campsite, or cabin.
- You run off-grid systems with low water pressure down to 3.0 PSI.
- You want an outdoor shower setup that does not require 120V electricity.
Skip if
- You need to supply hot water to multiple indoor fixtures at the same time.
- You require an indoor-rated tankless water heater.
- You want a high-output unit delivering more than 1.32 GPM.
Verdict: Camplux 5L Portable Propane Water Heater delivers lightweight, battery-powered outdoor heating for single-fixture RV and camping setups. Its 1.32 GPM capacity and 3.0 PSI minimum water pressure make it well suited for off-grid locations without electrical connections.
Camplux 2.11 GPM Portable Outdoor Propane Water Heater
Best for: off-grid camping and outdoor portable washing
- 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 propane tankless water heater delivers up to 2.11 GPM with a heat output of 55,000 BTU/hr. Powered by two D batteries and a standard 20-pound propane tank, it operates with water pressure as low as 3.6 PSI. It suits you if you need a lightweight, 19-pound outdoor heater for off-grid camping, cabins, or washing gear rather than a whole-house installation.
Pros
- Activates at a low starting water pressure of 3.6 PSI
- Delivers up to 2.11 GPM with a 55,000 BTU/hr output
- Runs electronic ignition on two D-cell batteries without mains power
- Includes a 5-foot shower head, gas regulator, and garden hose adapter
Cons
- Maximum output of 55,000 BTU/hr is lower than permanent residential models
- Requires manual draining via the drain stem to avoid cold-climate freeze damage
- Maximum water flow rate tops out at 2.11 GPM
Good fit if
- You need a portable 19-pound unit for camping, cabins, or outdoor wash stations.
- You operate in remote setups without electrical hookups using battery ignition.
- You connect to low-pressure water supplies down to 3.6 PSI.
Skip if
- You need to supply hot water to multiple indoor fixtures at once.
- You require a flow rate greater than 2.11 GPM.
Verdict: Camplux 2.11 GPM Portable Outdoor Tankless Water Heater provides reliable off-grid hot water for low-demand applications using portable propane and battery ignition. It trades the high output of permanent whole-house heaters for low water pressure activation and easy transport.
VEVOR 5.3 Gal Outdoor Propane Tankless Heater
Best for: outdoor whole-house propane water 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 tankless water heater provides whole-house hot water with an output rating of 120,000 BTU/h and a 5.3-gallon capacity. You can manage temperature settings within plus or minus 1°F using the included 32.8-foot wired control panel. It connects via standard 3/4-inch NPT fittings and weighs 29.1 pounds. This model suits you if you need a dedicated exterior propane unit to supply continuous hot water for domestic fixtures.
Pros
- 120,000 BTU/h heating capacity with 5.3 Gal output
- Precision temperature control within ±1°F
- Includes 32.8-foot wired remote control panel
- Standard 3/4-inch NPT pipe connections
Cons
- Requires outdoor-only mounting location
- Operates exclusively on liquid propane fuel
Good fit if
- You need an exterior propane tankless unit for whole-house use.
- You want a 32.8-foot wired control panel to adjust temperatures from indoors.
Skip if
- You require an indoor water heater installation.
- You need a natural gas connection instead of propane.
Verdict: VEVOR 5.3 Gal Outdoor Propane Water Heater delivers 120,000 BTU/h of heating capacity with consistent ±1°F temperature regulation. Its long 32.8-foot wired control panel allows convenient monitoring for outdoor whole-house propane setups.
Specifications side by side
| Spec | Noritz 6.6 GPM Outdoor Liquid Propane Tankless Heater | Rinnai 6.1 GPM Outdoor Propane Water Heater | Rinnai Smart-Circ 6.1 GPM Propane Heater | A. O. Smith 6.6 GPM Outdoor Propane Tankless Water Heater | Camplux 5L Portable Propane Water Heater | Camplux 2.11 GPM Portable Outdoor Propane Water Heater | VEVOR 5.3 Gal Outdoor Propane Tankless Heater |
|---|---|---|---|---|---|---|---|
| Fuel Type | Liquid Propane | Propane | Propane | Propane | Propane | Propane | Propane |
| Flow Rate | 6.6 Gpm | 6.1 GPM | 6.1 GPM | 6.6 GPM | 1.32 GPM | 2.11 GPM | not specified |
| BTU | 140,000 Btuh | not specified | not specified | 120,000 BTU/hr | not specified | 55,000 BTU/hr | 120,000 BTU/h |
| Installation Location | Outdoor | Outdoor | Outdoor | Outdoor | Outdoor | Outdoor | Outdoor |
| Temperature Control | not specified | not specified | not specified | not specified | not specified | 18-95 °F | ±1°F |
| Certification | not specified | not specified | not specified | not specified | CSA | CSA | not specified |
| Dimensions | 26.6 x 17.6 x 10.7 inches | 24.6 x 14.1 x 10.8 in | 24.6 x 14.1 x 10.8 inches | 22.9 x 13.9 x 13.9 inches | 4.33 x 11.4 x 14.8 inches | 20.5 x 12.6 x 12.6 inches | 23.2 x 15 x 15 inches |
| Use | not specified | not specified | not specified | not specified | Camping, RV | Camping | Whole House |
| Venting Type | not specified | Non-Condensing | not specified | not specified | not specified | not specified | not specified |
| Features | not specified | not specified | not specified | not specified | Overheat Protection | not specified | not specified |
| Weight | 36 pounds | 49.2 pounds | 56.6 pounds | 52 pounds | 10 pounds | 19 pounds | 29.1 pounds |
| Color | No Finish | Silver | Silver | White | White | White | Silver Gray |
| Model | NR662-OD-LP | REU-VE2125WD-US-P | REU-VEP2125WD-US-P | ATO-140H 101 | AY132 | BW211 | JSW38-20L-B |
| Size | not specified | 6.6 GPM | 6.6 GPM | not specified | Classic | not specified | 5.3 Gal |
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Frequently asked questions
Which outdoor propane tankless water heater includes built-in recirculation?
The Rinnai Smart-Circ REU-VEP2125WD-US-P includes dedicated recirculation scheduling directly inside the unit. You do not need to install secondary external pumps to circulate water through your plumbing. This outdoor liquid propane model delivers a 6.6 GPM flow rate and weighs 56.6 pounds in a 14.1-inch-wide housing.
What is the smallest portable propane alternative for off-grid use?
The Camplux AY132 is the most compact option, weighing only 10 pounds. It measures 11.4 inches wide and 4.33 inches high, making it easy to pack for camping or RV trips. The heater provides 1.32 GPM output, includes overheat protection, and operates on water pressure as low as 3.0 PSI.
Which alternative includes an extended wired controller for outdoor installations?
The VEVOR JSW38-20L-B features an included 32.8-foot wired control panel for exterior monitoring. You can manage its 120,000 BTU/h output and ±1°F temperature regulation from a distance. The unit provides a 5.3-gallon capacity and weighs 29.1 pounds with dimensions of 15 by 23.2 inches.
How does the A. O. Smith outdoor model compare in flow rate and heating capacity?
The A. O. Smith ATO-140H 101 matches the 6.6 GPM flow rate while providing 120,000 BTU of heating performance. It uses dual-metal heat exchangers designed for exterior propane setups. The heater weighs 52 pounds, stands 22.9 inches tall, and includes safety sensors to protect your outdoor installation.
Is there a portable outdoor propane heater that offers more than two gallons per minute?
The Camplux BW211 delivers a 2.11 GPM flow rate for outdoor washing and camping setups. It uses battery ignition to light without an electrical outlet and supports low water pressure activation. The exterior unit weighs 19 pounds and measures 12.6 inches wide by 20.5 inches high.
Which whole-house outdoor propane alternative has the lowest unit weight?
The VEVOR JSW38-20L-B is the lightest whole-house outdoor propane option at 29.1 pounds. By comparison, the Noritz NR662-OD-LP weighs 36 pounds, and the Rinnai options weigh between 49.2 and 56.6 pounds. The VEVOR heater delivers 120,000 BTU/h of heating capacity in a 15-inch-wide casing.