Looking Beyond the Westinghouse Tankless Water Heater Propane? 6 Alternatives Worth a Look
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The Westinghouse tankless water heater propane alternatives list helps you find units with similar performance but different features. This model delivers 5.1 GPM at 120,000 BTU with precise ±1°F temperature stability. It activates at just 0.53 GPM, which suits older plumbing systems. You might look elsewhere if you need indoor installation, smart app control, or a smaller footprint for tight spaces.
We selected these options because their specifications overlap with the original unit’s core capabilities. Each alternative shares key metrics like propane fuel type and high BTU output. Some models offer higher flow rates for larger households. Others provide remote control features or compact designs for RVs. This guide compares these specs so you can match the right unit to your home’s specific needs without guessing.
Our top pick: Westinghouse Outdoor Propane 5.1 GPM Tankless Heater.
How these models compare to Westinghouse
NOVIEEX 5.3 GPM Outdoor Propane Tankless Water Heater
The NOVIEEX unit offers a slightly higher flow rate of 5.3 GPM compared to the Westinghouse 5.1 GPM. Both deliver 120,000 BTU for outdoor propane heating. The NOVIEEX model weighs 34 pounds and measures 15 by 23.7 inches. It is designed for high-demand households needing consistent hot water at multiple fixtures. If you require maximum flow volume for large families, this alternative provides a marginal increase. However, it lacks the specific ±1°F stability specification listed for the Westinghouse. Choose this if peak flow matters more than precise temperature modulation.
Orbek 120K BTU Propane Outdoor Heater
The Orbek 120K BTU Outdoor model matches the Westinghouse flow rate at 5.1 GPM. It shares the same outdoor propane design and 120,000 BTU output. Dimensions are identical at 15.5 by 23.9 inches. This unit is positioned as the premium option in the list. It may offer higher build quality or additional features not detailed in the basic specs. If you prioritize a trusted brand name for outdoor whole-house applications, this serves as a direct equivalent. The trade-off is likely cost rather than performance, as the core specifications remain very similar to the Westinghouse baseline.
Orbek 120,000 BTU Propane Tankless Heater
This Orbek model provides 120,000 BTU of propane power but differs in its smart features. It includes app control for remote temperature adjustment, which the Westinghouse wired controller does not offer. The unit is more compact, measuring 14.6 by 22.8 inches and weighing only 25.6 pounds. It is suitable for users who want modern integration and flexible installation. While it matches the outdoor propane requirement, it sacrifices the wired controller convenience for digital control. Select this if you prefer managing your water heater via a smartphone application rather than a physical panel.
Camplux 5L Portable Propane Water Heater
The Camplux 5L is a portable unit designed for camping and RV use, not whole-house installation. It delivers a much lower flow rate of 1.32 GPM compared to the Westinghouse 5.1 GPM. It weighs only 10 pounds and measures 11.4 by 4.33 inches. This model is ideal for off-grid scenarios where portability is essential. It lacks the high BTU output and continuous flow needed for indoor home use. Choose this alternative only if you need hot water for outdoor showers or travel. It is not a substitute for a permanent residential water heating solution.
Camplux 2.11 GPM Portable Outdoor Propane Water Heater
The Camplux BW211 is another portable option for camping, offering 2.11 GPM. It is CSA-approved for safety but remains a low-flow unit. It weighs 19 pounds and measures 12.6 by 20.5 inches. This heater is suitable for short-term outdoor use rather than domestic whole-house needs. It does not match the 120,000 BTU capacity or the 5.1 GPM flow of the Westinghouse. If you need reliable hot water for RV trips or camping, this is a practical choice. For home use, it will not provide sufficient water volume for showers or kitchen sinks simultaneously.
APUS 5.43 GPM Propane Tankless Water Heater
The APUS model is designed for indoor installation, unlike the outdoor-only Westinghouse unit. It delivers 5.43 GPM, which is higher than the Westinghouse 5.1 GPM. Both use propane and provide 120,000 BTU. The APUS unit measures 19.3 by 27.6 inches and weighs 19.2 pounds. It is built for multi-point households needing high indoor flow. If you require a tankless heater for an interior closet or utility room, this is the correct alternative. It offers better flow and indoor compatibility but requires proper venting and indoor installation standards.
Quick picks
Our 7 picks
Westinghouse Outdoor Propane 5.1 GPM Tankless Heater
Best for: outdoor whole-house hot water
- Fuel Type
- Propane
- Flow Rate
- 5.1 GPM
- BTU
- 120,000 BTU
- Installation Location
- Outdoor
- Voltage
- 120 V AC
- Temperature Control
- 95°F–158°F, ±1°F
View on Amazon: Westinghouse Outdoor Propane 5.1 GPM Tankless Heater Affiliate link
The Westinghouse APOLO-120K delivers 5.1 GPM of hot water using 120,000 BTUs of propane power. It maintains temperature stability within ±1°F, preventing sudden fluctuations during use. The unit requires outdoor wall mounting and a 120V AC power source. Its low 0.53 GPM activation flow makes it suitable for older plumbing systems. This model supports simultaneous use at two to four fixtures.
Pros
- 5.1 GPM flow rate for whole-house use
- ±1°F temperature stability with self-modulating technology
- 0.53 GPM minimum activation flow for low pressure
- Wired digital controller with 95°F–158°F range
Cons
- Requires 120V AC electrical connection
- Outdoor installation only
- 2-year comprehensive warranty is shorter than some competitors
Good fit if
- You need stable water temperature for multiple fixtures
- You have an outdoor wall for mounting
- You require low flow activation for older plumbing
Skip if
- You need indoor installation capability
- You lack a 120V AC power source nearby
- You prefer a longer standard warranty period
Verdict: Westinghouse APOLO-120K Propane Outdoor Heater is a solid choice for outdoor whole-house hot water needs. It suits buyers who prioritize temperature consistency and low-flow activation over indoor versatility.
NOVIEEX 5.3 GPM Outdoor Propane Tankless Water Heater
Best for: high-flow outdoor whole-house hot water
- Fuel Type
- Propane
- Flow Rate
- 5.3 GPM
- BTU
- 120,000 BTU
- Installation Location
- Outdoor
- Voltage
- 110V-120V AC
- Temperature Control
- ±1°F, 95°F–149°F
View on Amazon: NOVIEEX 5.3 GPM Outdoor Propane Tankless Water Heater Affiliate link
The Novieex outdoor propane tankless water heater delivers 5.3 GPM at 120,000 BTU. It features a compact 23.7-inch height and precise digital temperature control within ±1°F. The unit includes a 6-layer safety system and anti-freeze protection. It suits families needing simultaneous hot water for multiple outlets in outdoor settings.
Pros
- 5.3 GPM flow rate supports 2-4 outlets
- Precise digital temp control within ±1°F
- 6-layer safety protection including anti-freeze
- Compact 23.7-inch height for easy mounting
Cons
- Outdoor-only installation limits placement options
- Not recommended for elevations over 2,000 feet
- Requires draining in freezing conditions if unused
Good fit if
- You need high flow rate for multiple bathrooms
- You are installing on an exterior wall
- You want precise temperature stability
Skip if
- You require indoor installation
- You live above 2,000 feet elevation
- You need a portable unit for camping
Verdict: The Novieex 5.3 GPM Propane Outdoor Heater fits homes with high hot water demand and exterior mounting space. It delivers consistent performance for families using multiple outlets simultaneously.
Orbek 120K BTU Propane Outdoor Heater
Best for: High-flow outdoor propane applications
- Fuel Type
- Propane
- Flow Rate
- 5.1 GPM
- BTU
- 120,000 BTU/h
- Installation Location
- Outdoor
- Dimensions
- 23.9 x 15.5 x 15.5 in
View on Amazon: Orbek 120K BTU Propane Outdoor Heater Affiliate link
The Orbek HS120 is a 120,000 BTU propane tankless water heater designed for outdoor installation. It delivers up to 5.1 GPM of hot water. The unit features a white finish and measures 23.9 inches in height. You can control the temperature using the included remote and front display. This model suits households needing high flow rates for outdoor or garage use.
Pros
- 120,000 BTU heating input for strong performance
- Includes remote control for convenient temperature setting
- Front display shows current water temperature
- Dedicated outdoor propane configuration
Cons
- Outdoor-only placement limits indoor options
- Large footprint at 15.5 x 23.9 inches
- Flow rate varies with inlet water temperature
Good fit if
- You need a high-flow unit for outdoor use
- You want remote temperature control
- You have space for a large outdoor unit
Skip if
- You require indoor installation
- You need a compact unit for small spaces
- You use natural gas instead of propane
Verdict: Orbek 120K BTU Propane Outdoor Heater provides reliable high-flow performance for outdoor setups. It fits users who need remote control and have the space for a larger unit.
Orbek 120,000 BTU Propane Tankless Heater
Best for: Smart home integration and flexible installation
- Fuel Type
- Propane
- Flow Rate
- 5.1 GPM
- BTU
- 120,000 BTU
- Installation Location
- Indoor/Outdoor
- Voltage
- 120V
- Temperature Control
- 95°F to 149°F, ±1°F
View on Amazon: Orbek 120,000 BTU Propane Tankless Heater Affiliate link
The Orbek propane heater delivers 5.1 GPM at 120,000 BTU for whole-house use. It features smart WiFi app control and voice commands via Alexa. The unit supports both indoor and outdoor installation. A 22,000-time-per-second chip maintains temperature stability within 1°F. It includes a smart remote and LED display for precise adjustments between 95°F and 149°F.
Pros
- 5.1 GPM flow rate at 120,000 BTU
- Smart WiFi app and Alexa voice control
- Indoor and outdoor installation options
- Temperature stability within 1°F
- Includes smart remote and LED display
Cons
- Weatherproof exhaust hood sold separately for outdoor use
- 2-year unit warranty is shorter than typical 5-year standards
- Requires professional installation for safety and compliance
Good fit if
- You want smartphone control for temperature and monitoring
- You need a unit for indoor or outdoor mounting
- You require stable water temperature within 1°F
Skip if
- You prefer a unit with a standard 5-year warranty
- You want a weatherproof hood included in the box
- You need a portable unit for camping trips
Verdict: Orbek 120,000 BTU Propane Tankless Heater suits buyers who prioritize smart home integration and flexible installation locations. Its app control and precise temperature stability make it a strong choice for modern homes.
Camplux 5L Portable Propane Water Heater
Best for: Camping and RV 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 Affiliate link
The Camplux AY132 is a 1.32 GPM propane water heater designed for off-grid use. It weighs 10 pounds and measures 14.8 inches long, making it highly portable for camping or RV trips. The unit requires no electricity, starting with just 3.0 PSI of water pressure. It includes CSA certification for safety and features overheat protection. This compact heater suits users needing instant hot water in remote locations without grid power.
Pros
- 1.32 GPM flow rate for instant hot water
- Low 3.0 PSI start pressure for gravity-fed systems
- CSA certified with 6-in-1 safety protections
- Lightweight 10-pound build with folding handle
Cons
- Low 1.32 GPM flow rate limits simultaneous use
- Outdoor installation only restricts indoor placement
- Requires 2 D-size batteries for ignition
Good fit if
- You need a lightweight heater for camping or RVs
- You rely on low-pressure water sources like gravity bags
- You want a CSA-certified unit for safety compliance
Skip if
- You need hot water for multiple showers at once
- You plan to install the unit indoors
- You require high flow rates for household use
Verdict: Camplux 1.32 GPM Portable Propane Heater is a practical choice for campers and RV travelers who prioritize portability and off-grid compatibility over high volume. It delivers reliable heat where grid power is unavailable.
Camplux 2.11 GPM Portable Outdoor Propane Water Heater
Best for: camping and off-grid outdoor showers
- 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 Affiliate link
This portable Camplux unit delivers 55,000 BTU and up to 2.11 GPM for outdoor use. It runs on a standard 20 lb propane tank and weighs 19 pounds. The 18-95 °F range and CSA approval suit camping or remote sites. You get a 1-year guarantee and included accessories. It fits users needing a lightweight, off-grid hot water solution.
Pros
- Lightweight 19-pound design for easy transport
- CSA safety approval with six protections
- Runs on standard 20 lb propane tanks
- Includes shower head and regulator
Cons
- Lowest flow rate of 1.1 GPM
- Requires 2 D-cell batteries for ignition
- Outdoor installation only
Good fit if
- You need a lightweight heater for camping
- You require CSA safety certification
- You have access to standard propane tanks
Skip if
- You need indoor installation options
- You require higher than 2.11 GPM flow
- You want battery-free electronic ignition
Verdict: Camplux BW211 Portable Propane Heater offers a compact, CSA-approved solution for campers needing reliable hot water. It fits outdoor enthusiasts who prioritize portability and safety over high flow rates.
APUS 5.43 GPM Propane Tankless Water Heater
Best for: Indoor multi-point households needing high flow
- Fuel Type
- Propane
- 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 5.43 GPM Propane Tankless Water Heater Affiliate link
The APUS 120,000 BTU propane tankless water heater delivers 5.43 GPM for indoor use. It features a compact wall-mounted design and precise ±1°F temperature control via an LED touchscreen. Oxygen-free copper construction supports a UEF of 0.81. Standard 120V AC powers the unit. It includes anti-freeze protection and a two-year warranty. This model suits multi-point households needing reliable indoor heating.
Pros
- 120,000 BTU output with 5.43 GPM flow rate
- Indoor installation with compact wall-mounted footprint
- ±1°F temperature precision using high-precision sensors
- LED touchscreen display for clear setting visibility
- Oxygen-free copper heat exchanger for thermal efficiency
Cons
- Indoor-only installation limits outdoor versatility
- 2-year warranty is shorter than many competitors
- Requires standard 120V AC electrical connection
Good fit if
- You need a high-flow unit for indoor plumbing
- You want precise temperature control with an LED display
- You have a multi-person household requiring 3–4 water points
Skip if
- You require outdoor installation for weather resistance
- You need a longer warranty than two years
- You prefer a unit with no electrical power requirement
Verdict: APUS 120k BTU Indoor Propane Heater is a strong option for homes needing high indoor flow. It offers precise control and efficient heating for multi-point usage. Buyers prioritizing indoor performance and temperature stability will find it suitable.
Specifications side by side
| Spec | Westinghouse Outdoor Propane 5.1 GPM Tankless Heater | NOVIEEX 5.3 GPM Outdoor Propane Tankless Water Heater | Orbek 120K BTU Propane Outdoor Heater | Orbek 120,000 BTU Propane Tankless Heater | Camplux 5L Portable Propane Water Heater | Camplux 2.11 GPM Portable Outdoor Propane Water Heater | APUS 5.43 GPM Propane Tankless Water Heater |
|---|---|---|---|---|---|---|---|
| Fuel Type | Propane | Propane | Propane | Propane | Propane | Propane | Propane |
| Flow Rate | 5.1 GPM | 5.3 GPM | 5.1 GPM | 5.1 GPM | 1.32 GPM | 2.11 GPM | 5.43 GPM |
| BTU | 120,000 BTU | 120,000 BTU | 120,000 BTU/h | 120,000 BTU | not stated | 55,000 BTU/hr | 120,000 BTU |
| Installation Location | Outdoor | Outdoor | Outdoor | Indoor/Outdoor | Outdoor | Outdoor | Indoor |
| Voltage | 120 V AC | 110V-120V AC | not stated | 120V | not stated | not stated | 120V AC |
| Temperature Control | 95°F–158°F, ±1°F | ±1°F, 95°F–149°F | not stated | 95°F to 149°F, ±1°F | not stated | 18-95 °F | 95–149°F, ±1°F |
| Certification | CSA, ANSI | not stated | not stated | CSA | CSA | CSA | not stated |
| Dimensions | 23.9 x 15.5 x 7.3 in | 23.7"L x 15"W x 5.1"H | 23.9 x 15.5 x 15.5 in | 22.83 x 14.57 x 7 inches | 4.33 x 11.4 x 14.8 inches | 20.5 x 12.6 x 12.6 inches | 20.55 x 13.27 x 5.91 inches |
| Use | Whole House | not stated | not stated | Cabins | Camping, RV | Camping | not stated |
| Venting Type | Non-Condensing | not stated | not stated | not stated | not stated | not stated | not stated |
| Features | not stated | not stated | not stated | not stated | Overheat Protection | not stated | not stated |
| Weight | not stated | 34 pounds | not stated | 25.6 pounds | 10 pounds | 19 pounds | 19.2 pounds |
| Size | APOLO-120K | not stated | Large (5.1 GPM 120,000 BTU Outdoor) | not stated | Classic | not stated | not stated |
| Color | Grey 51PO | Gray | White | White | White | White | Space Gray |
| Model | AMZ-HS120A1G-LP | HS-20 | HS120 | HW120A1W-LP | AY132 | BW211 | AP-AWH-Q16LPG |
If you also heat outdoor areas, specifications for fammyloft propane patio heater alternatives show different heat output ratings.
Frequently asked questions
What is the best propane tankless water heater for outdoor use?
The Westinghouse APOLO-120K is the top choice for outdoor whole-house hot water. It provides 5.1 GPM flow and 120,000 BTU of heating power. The unit measures 15.5 by 23.9 inches and weighs enough for stable outdoor mounting. It prioritizes temperature consistency and low-flow activation for reliable performance.
Which propane heater offers the highest flow rate for outdoor showers?
The NOVIEEX 5.3 GPM Outdoor Propane Tankless Water Heater delivers the highest flow in this group. It matches the 120,000 BTU output of other premium models. Weighing 34 pounds, it fits homes with high hot water demand. The design supports consistent performance for families using multiple outlets simultaneously outdoors.
Can I control my propane tankless heater with a smartphone app?
Yes, the Orbek 120,000 BTU Propane Tankless Heater includes app control for smart home integration. This model allows you to adjust settings remotely. It offers precise temperature stability and flexible installation options. The unit is ideal for modern homes that prioritize digital convenience and remote monitoring capabilities for their water heating.
Is there a propane water heater suitable for indoor installation?
The APUS 5.43 GPM Propane Tankless Water Heater is designed for indoor multi-point households. It delivers 120,000 BTU of heating power in a compact Space Gray casing. The unit measures 19.3 by 27.6 inches and weighs 19.2 pounds. It offers precise control and efficient heating for indoor environments requiring high flow.
What is the lightest propane water heater for camping trips?
The Camplux 5L Portable Propane Water Heater is the lightest option at just 10 pounds. It measures 11.4 by 4.33 inches, making it highly portable for RVs and camping. This unit provides reliable heat where grid power is unavailable. It includes overheat protection for safe off-grid showers and outdoor cooking.
Which propane heater is best for RV off-grid showers?
The Camplux 2.11 GPM Portable Outdoor Propane Water Heater is a compact, CSA-approved solution for RV travelers. It weighs 19 pounds and measures 12.6 by 20.5 inches. This model fits outdoor enthusiasts who prioritize portability and safety. It delivers reliable hot water without needing a permanent installation or electrical grid connection.
How does the Orbek heater compare to the Westinghouse model?
Both the Orbek 120K BTU and Westinghouse APOLO-120K deliver 120,000 BTU for outdoor propane heating. The Orbek unit offers remote control capabilities that the Westinghouse model lacks. Both share similar dimensions, with the Orbek measuring 15.5 by 23.9 inches. Choose Orbek for smart features or Westinghouse for proven temperature consistency.