Looking Beyond the Noritz NR50ODNG Outdoor Tankless Water Heater? 6 Alternatives Worth a Look
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If you are considering noritz nr50odng outdoor tankless water heater alternatives, you may want to compare other options. The Noritz NR50 Outdoor Natural Gas Tankless Heater delivers 5.0 GPM at 120,000 BTU/hr. It is compact at 17.6 inches wide and 26.6 inches high. This unit is ideal for small outdoor spaces with low flow needs. Its low NOx emissions make it suitable for areas with strict environmental regulations.
However, you might need more hot water or a different size. Some buyers prefer higher flow rates for larger households. Others may want a more compact unit for tight installations. This list includes 6 alternatives chosen because their specs overlap with the original. These options include models with higher BTU outputs, different dimensions, or varying flow capacities. You can find units designed for high-flow outdoor family use or compact indoor installations. Each alternative offers distinct specifications to match your specific hot water requirements.
Our top pick: Noritz Outdoor Natural Gas Tankless Heater, 5.0 GPM.
How each alternative compares
Ranein 8.5 GPM Outdoor Natural Gas Water Heater
The Ranein 8.5 GPM Outdoor Natural Gas Water Heater offers a higher flow rate than the Noritz NR50. While the Noritz provides 5.0 GPM, this Ranein unit delivers 8.5 GPM at 190,000 BTU. It is designed for large households needing strong output. The unit weighs 44 pounds and measures 15.1 inches wide. It fits outdoor spots where high flow matters. You gain more simultaneous hot water but lose the compact footprint of the Noritz. This model suits those prioritizing volume over minimal size. It is a budget-friendly option for families with higher demands.
Rinnai RE180eN Outdoor Natural Gas Heater
The Rinnai RE180eN Outdoor Natural Gas Heater is a premium choice for compact outdoor installations. It shares the 5.0 GPM flow rate of the Noritz but weighs significantly more at 53.1 pounds. The unit is slightly narrower at 14.1 inches wide. It uses non-condensing venting technology. This model suits homeowners needing reliable hot water in tight spaces. You get long-term durability and a silver finish. You give up the lighter weight and simpler profile of the Noritz. This unit is ideal if you prioritize build quality and compact width over raw power. It fits users who value consistent performance in constrained areas.
Rinnai RUS65eN Natural Gas Tankless Heater
The Rinnai RUS65eN Natural Gas Tankless Heater is designed for outdoor multi-bathroom households. It delivers 5.0 GPM like the Noritz but features a taller profile at 35 inches high. The unit is 14.5 inches wide and 22 inches deep. It weighs more than the Noritz NR50. This model suits spaces where vertical space is available but width is limited. You gain a robust build for moderate simultaneous needs. You lose the shorter height of the Noritz. This heater fits outdoor settings where consistent flow is required. It is a solid choice for households needing reliable performance without the bulk of larger commercial units.
VancEpic 190k BTU Outdoor Gas Heater
The VancEpic 190k BTU Outdoor Gas Heater provides strong output for large households. It offers 8.5 GPM, which is higher than the Noritz NR50. The unit weighs 49 pounds and measures 15.1 inches wide. It is designed for high-flow outdoor needs under 2,000 feet elevation. You gain significant power for multiple fixtures. You lose the compact nature of the Noritz. This model requires careful altitude and climate considerations. It suits buyers who need maximum hot water volume. It is a good alternative if you prioritize flow rate over the smaller footprint of the Noritz. The gray finish matches outdoor utility spaces well.
APUS 120,000 BTU Natural Gas Tankless Heater
The APUS 120,000 BTU Natural Gas Tankless Heater is an indoor option, unlike the Noritz NR50. It shares the 120,000 BTU rating but is designed for indoor homes. It weighs only 19.2 pounds, making it lighter than the Noritz. The unit is 19.3 inches wide and 27.6 inches high. It offers 5.0 GPM flow. You gain a compact, lightweight unit for indoor use. You lose the outdoor weatherproofing of the Noritz. This model fits indoor homes needing precise heating. It lacks the raw power of larger outdoor units. It is ideal for smaller households prioritizing space efficiency. The space gray finish suits modern interior installations.
Thermomate 5 GPM Indoor Natural Gas Tankless Water Heater
The Thermomate 5 GPM Indoor Natural Gas Tankless Water Heater is built for indoor homes. It provides 5.0 GPM like the Noritz but is designed for indoor safety. The unit weighs 22 pounds and is 13.8 inches wide. It features wind-resistant exhaust for reliable indoor performance. You gain stable hot water with precise temperature consistency. You lose the outdoor durability of the Noritz. This model suits buyers prioritizing safety certifications over maximum BTU output. It is ideal for homes needing reliable indoor performance. The metallic silver finish is sleek. It fits spaces where indoor installation is required. It offers consistent flow without the bulk of larger units.
Quick picks
Our 7 picks
Noritz Outdoor Natural Gas Tankless Heater, 5.0 GPM
Best for: small outdoor spaces with low flow needs
- Fuel Type
- Natural Gas
- Flow Rate
- 5.0 GPM
- BTU
- 120,000 BTU/hr
- Installation Location
- Outdoor
- Dimensions
- 26.6 x 17.6 x 10.7 inches
- Weight
- 33 pounds
View on Amazon: Noritz Outdoor Natural Gas Tankless Heater, 5.0 GPM Affiliate link
The Noritz NR50ODNG is an outdoor natural gas tankless water heater designed for high efficiency and low emissions. It delivers up to 5.0 GPM with 120,000 BTU/hr output. Its compact footprint measures 26.6 x 17.6 x 10.7 inches. This unit suits homes needing reliable endless hot water in outdoor settings. It is a practical option for those prioritizing space-saving design and clean combustion.
Pros
- Delivers 5.0 GPM flow rate
- 120,000 BTU/hr heating capacity
- Compact outdoor design fits tight spaces
- High efficiency with low NOx emissions
Cons
- Lower flow rate than 8.5 GPM competitors
- Outdoor installation only
- Heavier build at 33 pounds
Good fit if
- You need a compact outdoor unit
- You prioritize low NOx emissions
- You have natural gas supply
Skip if
- You require high flow rates above 5 GPM
- You need indoor installation capability
- You prefer lighter weight units
Verdict: Noritz NR50 Outdoor 5 GPM Heater fits small outdoor spaces well. It works best for single-bath setups or light commercial use where low emissions matter more than high flow.
Ranein 8.5 GPM Outdoor Natural Gas Water Heater
Best for: High flow outdoor family use
- Fuel Type
- Natural Gas
- Flow Rate
- 8.5 GPM
- BTU
- 190,000 BTU
- Installation Location
- Outdoor
- Dimensions
- 24.3 x 15.1 x 15.1 in
- Weight
- 44 pounds
View on Amazon: Ranein 8.5 GPM Outdoor Natural Gas Water Heater Affiliate link
This Ranein unit delivers 190,000 BTU/hr and 8.5 GPM for outdoor use. Its compact 24.3 x 15.1 x 8.1 inch frame fits tight spaces. The fan sits underneath to prevent smoke backflow. It supports 4-6 outlets. Anti-freeze protection guards against cold damage. You get on-demand hot water without waiting. It suits large families needing high flow.
Pros
- 190,000 BTU/hr heating capacity
- 8.5 GPM maximum flow rate
- Under-mounted fan reduces backflow risk
- Anti-freeze protection included
- Compact 24.3 x 15.1 x 8.1 inch size
Cons
- Not recommended for altitudes over 2,000 feet
- Weight is 44 pounds
- No digital display mentioned in specs
Good fit if
- You need high flow for multiple showers
- You have an outdoor installation space
- You want anti-freeze protection
Skip if
- You live above 2,000 feet elevation
- You require indoor installation
- You need a digital display
Verdict: Ranein 8.5 GPM 190k BTU Outdoor Heater provides strong output for large households. It fits well in outdoor spots where high flow matters most.
Rinnai RE180eN Outdoor Natural Gas Heater
Best for: compact outdoor installations with moderate hot water needs
- Fuel Type
- Natural Gas
- Flow Rate
- 8.5 GPM
- Installation Location
- Outdoor
- Dimensions
- 24.6 x 14.1 x 10.8 inches
- Venting Type
- Non-Condensing
- Weight
- 53.1 pounds
View on Amazon: Rinnai RE180eN Outdoor Natural Gas Heater Affiliate link
The Rinnai RE180eN is an outdoor natural gas unit designed for compact spaces. It delivers up to 6.9 GPM of hot water, suitable for five fixtures simultaneously. The non-condensing design simplifies venting. It weighs 53.1 pounds and measures 24.6 by 14.1 by 10.8 inches. This model includes an LED screen for error codes and service reminders. It offers a 15-year heat exchanger warranty.
Pros
- Delivers 6.9 GPM flow rate for multiple fixtures
- Compact dimensions fit tight outdoor spaces
- 15-year limited warranty on the heat exchanger
- LED screen displays error codes and reminders
Cons
- Lower flow rate than 8.5 GPM competitors
- WiFi control module sold separately
- Labor warranty defaults to 1 year if not registered within 90 days
Good fit if
- You need a compact outdoor unit for a small space
- You want a durable heat exchanger with a long warranty
- You prefer non-condensing venting simplicity
Skip if
- You require more than 6.9 GPM for high demand
- You want built-in WiFi connectivity without extra parts
- You need a unit for indoor installation only
Verdict: Rinnai RE180eN Outdoor Natural Gas Heater suits homeowners needing reliable hot water in tight spaces. It fits users prioritizing compact size and long-term durability over maximum flow rate.
Rinnai RUS65eN Natural Gas Tankless Heater
Best for: outdoor multi-bathroom households
- Fuel Type
- Natural Gas
- Flow Rate
- up to 6.5 GPM
- Installation Location
- Outdoor
- Dimensions
- 35 x 14.5 x 22 inches
View on Amazon: Rinnai RUS65eN Natural Gas Tankless Heater Affiliate link
The Rinnai RUS65eN is a natural gas tankless water heater designed for outdoor installation. It delivers a flow rate of 6.5 GPM, allowing it to serve up to five appliances simultaneously. The unit measures 35 x 14.5 x 22 inches and supports flexible venting options. It is suitable for homes needing reliable hot water without the bulk of a traditional tank.
Pros
- Delivers up to 6.5 GPM flow rate
- Serves up to 5 appliances at once
- Compact outdoor design saves space
- Supports PVC/CPVC venting for flexible placement
Cons
- Lower flow rate than 8.5 GPM competitors
- Heavier and bulkier than smaller indoor units
- Professional installation is required
Good fit if
- You need hot water for multiple bathrooms
- You have outdoor space for installation
- You prefer natural gas fuel
Skip if
- You require a flow rate above 7 GPM
- You need an indoor-only unit
- You want a DIY installation
Verdict: Rinnai RUS65eN Natural Gas Tankless Heater is a solid choice for households with moderate simultaneous hot water needs. It fits well in outdoor settings where space is limited but consistent flow is required.
VancEpic 190k BTU Outdoor Gas Heater
Best for: High-flow outdoor needs under 2,000 ft
- Fuel Type
- Natural Gas
- Flow Rate
- 8.5 GPM
- BTU
- 190,000 BTU
- Installation Location
- Outdoor
- Dimensions
- 24.3 x 15.1 x 8.1 inches
- Weight
- 49 pounds
View on Amazon: VancEpic 190k BTU Outdoor Gas Heater Affiliate link
This VancEpic unit delivers 190,000 BTU and an 8.5 GPM flow rate for outdoor use. It features a compact 24.3 x 15.1 x 8.1 inch design and weighs 49 pounds. The fan placement reduces backflow risk, and anti-freeze protection prevents internal damage. It suits families needing hot water for multiple outlets in suitable climates.
Pros
- 190,000 BTU heating capacity
- 8.5 GPM maximum flow rate
- Anti-freeze protection included
- Standard 3/4 inch NPT fittings
- Compact 49-pound build
Cons
- Not recommended for altitudes over 2,000 feet
- Requires manual draining in cold weather
- Lower flow rate than some competitors
Good fit if
- You need high capacity for 4-6 outlets
- You have an outdoor installation space
- You want anti-freeze protection
Skip if
- You live above 2,000 feet elevation
- You need indoor installation
- You want automatic freeze drainage
Verdict: VancEpic 190k BTU Outdoor Gas Heater provides strong output for large households but requires careful altitude and climate considerations.
APUS 120,000 BTU Natural Gas Tankless Heater
Best for: indoor homes needing compact heating
- Fuel Type
- Natural Gas
- Flow Rate
- 5.43 GPM
- BTU
- 120,000 BTU
- Installation Location
- Indoor
- Voltage
- 120V AC
- Temperature Control
- 95–149°F, ±1°F
View on Amazon: APUS 120,000 BTU Natural Gas Tankless Heater Affiliate link
This APUS unit delivers 120,000 BTU and up to 5.43 GPM for indoor use. It features ±1°F temperature control and a UEF of 0.81. The compact 20.55-inch height fits wall-mounted spaces. It powers on 120V AC and includes freeze protection. This model suits homes needing reliable indoor heating with precise temperature management.
Pros
- 120,000 BTU output for multi-point use
- ±1°F precision temperature control
- 0.81 UEF rating with copper heat exchanger
- Compact 20.55-inch wall-mounted design
Cons
- Lower 120,000 BTU capacity than competitors
- Indoor installation only
- Shorter 2-year warranty coverage
Good fit if
- You need an indoor gas water heater
- You want precise temperature control
- You have limited wall space
Skip if
- You require outdoor installation
- You need higher than 120,000 BTU
- You want a longer warranty
Verdict: APUS 120k BTU Indoor Gas Heater fits indoor homes needing compact, precise heating. It lacks the raw power of outdoor units but offers reliable performance for smaller households.
Thermomate 5 GPM Indoor Natural Gas Tankless Water Heater
Best for: Indoor homes needing stable 5 GPM hot water
- Fuel Type
- Natural Gas
- Flow Rate
- Up to 5 GPM
- BTU
- 102,000 BTU
- Installation Location
- Indoor
- Voltage
- 120V
- Temperature Control
- 90–140°F, ±1°F
View on Amazon: Thermomate 5 GPM Indoor Natural Gas Tankless Water Heater Affiliate link
The ThermoMate CZ422NG delivers up to 5 GPM of hot water using 113,000 BTUs of natural gas. It maintains a stable 105°F output with ±1°F consistency, thanks to rapid flow sensing. This indoor unit measures 21.7 inches high and weighs 22 pounds. It features a 3.5-inch LED display and wind-resistant exhaust. It suits homes needing reliable, space-saving hot water for two showers.
Pros
- 5.0 GPM flow rate for simultaneous use
- 113,000 BTU heating capacity
- Wind-resistant DC fan withstands Category 3+ storms
- 3.5-inch LED display for status monitoring
- CSA and UL certified safety protections
Cons
- Lower 113,000 BTU output compared to 190,000 BTU competitors
- Indoor installation only, not rated for outdoor use
- Heavier at 22 pounds than some compact models
Good fit if
- You need a reliable indoor unit for a whole house
- You want precise temperature control within ±1°F
- You require wind-resistant exhaust for exposed venting
Skip if
- You need an outdoor-rated heater for exterior walls
- You require more than 5 GPM for high demand
- You prefer a lighter unit under 20 pounds
Verdict: ThermoMate CZ422NG 5 GPM Indoor Heater provides stable hot water with wind-resistant exhaust for homes needing reliable indoor performance. It fits buyers who prioritize safety certifications and precise temperature consistency over maximum BTU output.
Specifications side by side
| Spec | Noritz Outdoor Natural Gas Tankless Heater, 5.0 GPM | Ranein 8.5 GPM Outdoor Natural Gas Water Heater | Rinnai RE180eN Outdoor Natural Gas Heater | Rinnai RUS65eN Natural Gas Tankless Heater | VancEpic 190k BTU Outdoor Gas Heater | APUS 120,000 BTU Natural Gas Tankless Heater | Thermomate 5 GPM Indoor Natural Gas Tankless Water Heater |
|---|---|---|---|---|---|---|---|
| Fuel Type | Natural Gas | Natural Gas | Natural Gas | Natural Gas | Natural Gas | Natural Gas | Natural Gas |
| Flow Rate | 5.0 GPM | 8.5 GPM | 8.5 GPM | up to 6.5 GPM | 8.5 GPM | 5.43 GPM | Up to 5 GPM |
| BTU | 120,000 BTU/hr | 190,000 BTU | not stated | not stated | 190,000 BTU | 120,000 BTU | 102,000 BTU |
| Installation Location | Outdoor | Outdoor | Outdoor | Outdoor | Outdoor | Indoor | Indoor |
| Voltage | not stated | not stated | not stated | not stated | not stated | 120V AC | 120V |
| Temperature Control | not stated | not stated | not stated | not stated | not stated | 95–149°F, ±1°F | 90–140°F, ±1°F |
| Certification | not stated | not stated | not stated | not stated | not stated | not stated | CSA, UL |
| Dimensions | 26.6 x 17.6 x 10.7 inches | 24.3 x 15.1 x 15.1 in | 24.6 x 14.1 x 10.8 inches | 35 x 14.5 x 22 inches | 24.3 x 15.1 x 8.1 inches | 20.55 x 13.27 x 5.91 inches | 21"H × 13"W × 7"D |
| Venting Type | not stated | not stated | Non-Condensing | not stated | not stated | not stated | not stated |
| Weight | 33 pounds | 44 pounds | 53.1 pounds | not stated | 49 pounds | 19.2 pounds | 22 pounds |
| Size | 17.6 inches (W) x 26.6 inches (H) | 8.5 GPM Outdoor | 8.5 GPM | 6.5 GPM | 8.5 GPM,190,000 BTU, Outdoor | not stated | not stated |
| Color | White | Gray-NG | Silver | Outdoor Installation | Gray-NG | Space Gray | Metallic Silver |
| Model | NR501-OD-NG | RHO19K-NG | REU-VE2432WD-US-N | RUS65eN | V-RHO19K-NG | AP-AWH-Q16NG | CZ422NG |
Looking beyond this list? See vagkri outdoor heaters alternatives.
Frequently asked questions
Is the Ranein 8.5 GPM unit better for large families?
Yes, the Ranein model delivers 8.5 GPM, which supports higher simultaneous demand. It fits well in outdoor spots where flow matters most. The Noritz NR50 provides only 5.0 GPM, making it better for small spaces or single-bath setups. Choose Ranein if you need strong output for multiple users.
Which outdoor heater is the most compact?
The Rinnai RE180eN is the most compact option at 14.1 inches wide and 24.6 inches high. It suits homeowners needing reliable hot water in tight spaces. The Noritz NR50 is slightly wider at 17.6 inches. If space is limited, the Rinnai unit offers a smaller footprint for outdoor installation.
Can I use the APUS heater outdoors?
No, the APUS 120,000 BTU heater is designed for indoor installation. It fits indoor homes needing compact heating. All other listed alternatives, including the Noritz NR50, are built for outdoor use. Do not install the APUS unit outside, as it lacks the necessary weatherproofing for exterior environments.
Which model is best for high-altitude use?
The VancEpic 190k BTU unit requires careful altitude and climate considerations. It provides strong output but needs adjustment for elevation changes. The Noritz NR50 and other standard models do not mention specific altitude adjustments. If you live above 2,000 feet, check the VancEpic specifications for proper derating requirements.
Does the Rinnai RE180eN use condensing technology?
No, the Rinnai RE180eN uses non-condensing venting technology. It is a non-condensing unit designed for outdoor natural gas installation. This differs from some indoor models that use condensing tech. The Noritz NR50 also operates as an outdoor non-condensing heater, offering similar venting requirements for exterior mounting.
Which heater weighs the least?
The APUS heater weighs 19.2 pounds, making it the lightest option. It is designed for indoor use with a compact profile. The Noritz NR50 weighs 33 pounds. The Ranein model is heavier at 44 pounds. If you need a lighter unit for easier handling, the APUS is the lightest choice.
Is the Thermomate CZ422NG suitable for outdoor use?
No, the Thermomate CZ422NG is intended for indoor installation. It provides stable hot water with wind-resistant exhaust for homes needing reliable indoor performance. The Noritz NR50 is built for outdoor environments. Do not install the Thermomate unit outside, as it is not rated for exterior weather conditions.