VELPAX Propane Tankless Water Heater vs VELPAX Outdoor Natural Gas Tankless Water Heater (2026): Key Differences
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This comparison covers the velpax propane tankless water heater vs outdoor natural gas tankless models. Both units are designed for outdoor wall mounting and feature digital remote controls for indoor temperature adjustment. They share similar construction materials, including stainless steel bodies and copper heat exchangers. The main difference lies in their fuel source and flow capacity. You will see how propane and natural gas options vary in output and physical dimensions to help you choose the right fit for your home.
Key differences
| Aspect | VELPAX 5.26 GPM Propane Outdoor Heater | VELPAX Outdoor Natural Gas Tankless Heater |
|---|---|---|
| Fuel Type | Propane | Natural Gas |
| Flow Rate | 5.26 GPM | 4.76 GPM |
| BTU Output | 120,000 BTU/h | 110,000 BTU |
| Dimensions | 22.8 x 14.4 x 5.9 in | 24 x 15 x 7.4 in |
| Voltage | 120V AC | 110 V, 60 Hz |
Which one should you choose?
Choose VELPAX 5.26 GPM Propane Outdoor Heater if
- You need the higher flow rate of 5.26 GPM for multiple simultaneous fixtures.
- You have a propane gas supply available at your outdoor location.
- You prefer a more compact unit with a smaller footprint.
Choose VELPAX Outdoor Natural Gas Tankless Heater if
- You are connected to a natural gas line for continuous fuel supply.
- You want a unit specifically noted for RV and livestock washing use.
- You prefer a slightly taller unit with a 16.4ft remote cable.
Verdict: Choose the propane model if you prioritize higher flow rate and a smaller physical size. Select the natural gas model if you have a direct gas line connection or need specific RV compatibility. Both units provide reliable outdoor performance with similar safety and temperature control features.
VELPAX Propane vs Natural Gas Specs
Fuel Type
The VELPAX 5.26 GPM Propane Outdoor Heater is designed exclusively for propane (LPG). The VELPAX Outdoor Natural Gas Tankless Heater runs on natural gas (NG) only. You must match the unit to your available fuel source. Propane is stored in tanks, while natural gas connects to utility lines. Using the wrong fuel type can damage the unit or create safety hazards. Both units are labeled for specific gas types, so verify your supply before installation. This is a fundamental difference that determines which model fits your home infrastructure.
Flow Rate
The VELPAX 5.26 GPM Propane Outdoor Heater delivers 5.26 gallons per minute. The VELPAX Outdoor Natural Gas Tankless Heater provides 4.76 gallons per minute. The propane model offers a higher flow rate, which is beneficial for running multiple fixtures simultaneously. Higher flow means better performance for showers and outdoor sinks. The difference is 0.50 GPM, which is noticeable when filling large tubs or using several outlets at once. If you need maximum water volume, the propane unit has the advantage.
BTU Output
The VELPAX 5.26 GPM Propane Outdoor Heater has a maximum output of 120,000 BTU per hour. The VELPAX Outdoor Natural Gas Tankless Heater operates at 110,000 BTU. The propane model burns hotter, which contributes to its higher flow rate and temperature rise capabilities. Higher BTU allows for faster heating of water, especially in colder climates. This difference matters when you need rapid hot water recovery during peak usage times. The propane unit provides more thermal power for on-demand heating.
Dimensions
The VELPAX 5.26 GPM Propane Outdoor Heater measures 22.8 inches in height, 14.4 inches in width, and 5.9 inches in length. The VELPAX Outdoor Natural Gas Tankless Heater is 24 inches tall, 15 inches wide, and 15 inches deep. The natural gas model is significantly deeper and slightly taller. The propane model is more compact in depth, making it easier to fit in tight spaces. Consider your mounting area carefully, as the natural gas unit requires more clearance for depth.
Water Pressure
The VELPAX 5.26 GPM Propane Outdoor Heater operates with water pressure as low as 3.6 PSI. The VELPAX Outdoor Natural Gas Tankless Heater requires 3 to 116 PSI. Both units handle low pressure well, starting at around 3 PSI. The propane model specifies a minimum of 3.6 PSI, while the natural gas model starts at 3 PSI. This makes both suitable for areas with weak water pressure. The difference is minimal, but the natural gas model has a slightly lower starting threshold.
Voltage
The VELPAX 5.26 GPM Propane Outdoor Heater requires a 120V AC power connection. The VELPAX Outdoor Natural Gas Tankless Heater uses 110V 60Hz AC power. Both units need standard electrical outlets for their digital displays and ignition systems. The voltage difference is negligible for typical home wiring. You will need an outdoor-rated outlet near the installation site for either model. Both are designed for easy plug-in installation without specialized electrical work.
Which VELPAX tankless heater suits you
You need higher flow for multiple fixtures
This propane model delivers 5.26 GPM, which is higher than the natural gas version's 4.76 GPM. It also has a higher 120,000 BTU input. This combination supports running three to four fixtures simultaneously. If you prioritize maximum hot water volume for whole-house use, the higher flow rate makes this unit the better choice for your daily needs.
You have natural gas supply available
This unit runs exclusively on natural gas, so it fits homes with existing gas lines. It provides 4.76 GPM and 110,000 BTU of heat. The remote control features a 16.4-foot cable for easy indoor mounting. If your home is connected to a natural gas grid rather than propane tanks, this is the only compatible option for your plumbing setup.
You want precise temperature stability
This propane heater includes water servo technology and built-in sensors. These features keep temperature fluctuations within ±1℃. The four-stage combustion system ensures steady performance in various seasons. If you value precise control over water heat and minimal temperature swings during use, the advanced regulation technology in this model offers superior consistency for your showers.
The products compared
VELPAX 5.26 GPM Propane Outdoor Heater
Best for: outdoor propane hot water needs
- Fuel Type
- Propane
- Flow Rate
- 5.26 GPM
- BTU
- 120,000 BTU/h
- Installation Location
- Outdoor
- Voltage
- 120V AC
- Temperature Control
- 35℃–65℃, ±1℃
View on Amazon: VELPAX 5.26 GPM Propane Outdoor Heater Affiliate link
This outdoor propane unit delivers 120,000 BTU and 5.26 GPM. It features a stainless steel body and an LED digital display for precise temperature control between 35°C and 65°C. The system includes a remote control panel and operates on 120V AC power. It suits outdoor spaces needing on-demand hot water with steady flow and safety protections.
Pros
- 120,000 BTU output for high flow
- 5.26 GPM capacity for multiple fixtures
- Digital display with remote control
- Stainless steel and copper construction
Cons
- Propane only, not compatible with natural gas
- Outdoor installation required
- Limited temperature range of 35°C to 65°C
Good fit if
- You need a high-output propane heater
- You want precise digital temperature control
- You have an outdoor installation space
Skip if
- You require natural gas compatibility
- You need indoor installation
- You prefer a smaller footprint
Verdict: VELPAX 120K BTU Propane Tankless Heater provides robust outdoor hot water with precise digital control. It fits buyers who need high flow and propane fuel in an outdoor setting.
VELPAX Outdoor Natural Gas Tankless Heater
Best for: natural gas outdoor showers and kitchens
- Fuel Type
- Natural Gas
- Flow Rate
- 4.76 GPM
- BTU
- 110,000 BTU
- Installation Location
- Outdoor
- Voltage
- 110 V, 60 Hz
- Use
- RV
View on Amazon: VELPAX Outdoor Natural Gas Tankless Heater Affiliate link
This VELPAX unit runs on natural gas to deliver 4.76 GPM of hot water at 110,000 BTU. It features a smart remote control with a 16.4ft cable, allowing you to adjust settings from indoors. The weather-resistant body supports outdoor wall-mount installation. It includes staged combustion technology to maintain stable temperatures. This model suits users needing continuous hot water for multiple outlets in outdoor or semi-outdoor settings.
Pros
- 110,000 BTU heating power for high flow rate
- Includes indoor digital remote with 16.4ft cable
- Staged combustion reduces temperature fluctuations
- Weather-proof design for outdoor wall-mount
Cons
- Lower flow rate of 4.76 GPM compared to 5.26 GPM propane model
- Requires standard 110V AC power supply
- Limited to natural gas fuel type only
Good fit if
- You need a dedicated natural gas outdoor unit
- You want to control temperature from inside your home
- You require stable water temperature for multiple outlets
Skip if
- You only have a propane gas line
- You need a flow rate above 5 GPM
- You prefer a unit without electrical power requirements
Verdict: VELPAX Outdoor Natural Gas Tankless Heater provides reliable outdoor hot water with the convenience of indoor remote control, making it a solid choice for natural gas users who value temperature stability over maximum flow volume.
Specifications side by side
| Spec | VELPAX 5.26 GPM Propane Outdoor Heater | VELPAX Outdoor Natural Gas Tankless Heater |
|---|---|---|
| Fuel Type | Propane | Natural Gas |
| Flow Rate | 5.26 GPM | 4.76 GPM |
| BTU | 120,000 BTU/h | 110,000 BTU |
| Installation Location | Outdoor | Outdoor |
| Voltage | 120V AC | 110 V, 60 Hz |
| Temperature Control | 35℃–65℃, ±1℃ | not stated |
| Dimensions | 22.8 x 14.4 x 5.9 in | not stated |
| Use | not stated | RV |
| Features | Digital Display | not stated |
| Size | 20L | Natural Gas |
| Color | White | White |
| Model | HW-XGRSQ-White-20L | RSQ-CTO18L |
Frequently asked questions
Can I use the propane heater indoors?
No, the VELPAX 5.26 GPM Propane Outdoor Heater is designed exclusively for outdoor installation. Its construction and safety features require ventilation that indoor spaces typically do not provide. You must mount it on an exterior wall to ensure proper airflow and safe operation of the propane fuel source.
What are the dimensions of the propane unit?
The VELPAX 5.26 GPM Propane Outdoor Heater measures 14.4 inches in width, 22.8 inches in height, and 14.4 inches in length. This compact footprint allows it to fit in tight outdoor spaces while still delivering high flow rates for your hot water needs.
Does the natural gas model have a remote control?
Yes, the VELPAX Outdoor Natural Gas Tankless Heater includes an indoor remote control. This feature lets you adjust the water temperature from inside your home without needing to access the outdoor unit. It adds convenience for users who want precise temperature stability without going outside.
How tall is the natural gas heater?
The VELPAX Outdoor Natural Gas Tankless Heater stands 24 inches tall. Its width and length are both 15 inches. These dimensions are slightly larger than the propane model, so you should verify your mounting space before installation to ensure a proper fit on your exterior wall.
Is the propane heater suitable for RV use?
The product data specifies the natural gas model for RV use. The propane heater is listed for outdoor hot water needs. While both are outdoor units, you should check your RV's specific fuel compatibility and space constraints. The propane unit focuses on high flow for residential outdoor settings.
What voltage does the natural gas unit require?
The VELPAX Outdoor Natural Gas Tankless Heater operates on 120V power. This standard voltage supports its digital controls and ignition system. You will need an accessible outdoor electrical outlet nearby to ensure the unit functions correctly and maintains consistent water temperature during operation.
Do both models have digital displays?
The propane model explicitly features a digital display. The natural gas model includes an indoor remote control, which likely serves a similar monitoring function. Both units allow you to track and adjust settings, ensuring you can manage your hot water temperature with precision and ease.