VELPAX Propane Tankless Water Heater or VELPAX Natural Gas Tankless Water Heater? Which VELPAX Model to Buy
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Choosing between the velpax propane tankless water heater vs natural gas tankless water models comes down to your home’s fuel supply. Both units are indoor models with identical dimensions and flow rates. They share the same 68,000 BTU output and safety features. The main difference is the fuel source. One uses propane, while the other uses natural gas. This affects installation requirements and gas line compatibility. You must select the model that matches your existing infrastructure.
Key differences
| Aspect | VELPAX 4.74 GPM Indoor Propane Water Heater | VELPAX 4.74 GPM Indoor Natural Gas Tankless Heater |
|---|---|---|
| Fuel Type | Propane | Natural Gas |
| Model Number | HWRSQ-18L-001 | HWRSQ-18L-002 |
| Flow Rate | 4.74 GPM | 4.74 GPM |
| BTU Output | 68,000 BTU/hr | 68,000 BTU/hr |
| Dimensions | 21.7 x 13.8 x 13.8 inches | 21.7 x 13.8 x 13.8 inches |
Which one should you choose?
Choose VELPAX 4.74 GPM Indoor Propane Water Heater if
- You have an existing propane tank or supply line available for the unit.
- You live in a remote area without access to natural gas infrastructure.
Choose VELPAX 4.74 GPM Indoor Natural Gas Tankless Heater if
- You have a direct connection to a municipal natural gas line.
- You prefer the convenience of an unlimited fuel supply without refilling tanks.
Verdict: Select the propane model if your home relies on propane storage tanks. Choose the natural gas model if you have a permanent natural gas line. Both units offer identical performance and physical specifications for your hot water needs.
Propane vs Natural Gas Comparison
fuel type
The primary difference lies in the fuel source required for operation. Product A is designed exclusively for propane (LPG), while Product B uses natural gas (LNG). This distinction dictates your installation requirements and ongoing fuel costs. You must ensure your home has the correct gas line infrastructure for your chosen model. Propane tanks are portable and useful for off-grid locations, whereas natural gas offers a continuous supply via utility lines. Select the version that matches your existing or available fuel source to ensure safe and efficient heating performance.
flow rate
Both units deliver an identical maximum flow rate of 4.74 gallons per minute. This capacity allows you to run two to three water points simultaneously, such as a shower and a kitchen sink. The 18L size supports this steady output for on-demand hot water. Whether you choose propane or natural gas, you will not notice a difference in the volume of hot water provided. This consistent flow rate makes either model suitable for standard bathrooms and kitchens in small cabins or remote apartments where simultaneous usage is common.
temperature control
Each heater offers precise digital temperature adjustment via an LED smart display. You can set the water temperature between 95°F and 149°F. The maximum temperature rise is 65°C for both models. This range allows you to customize water heat for different uses, from gentle hand washing to robust showering. The steady temperature control ensures consistent output regardless of the fuel type. Both products provide the same level of comfort and control, allowing you to fine-tune the heat settings easily without compromising performance.
build quality
Construction is identical for both the propane and natural gas versions. They feature a stainless steel body for superior corrosion resistance and durability. The internal water tank is made from oxygen-free copper, which minimizes heat loss and extends service life. This premium build ensures efficient heat transfer and long-term reliability. The compact design saves over 50% of space compared to traditional tank models. You get the same robust construction and safety features, including anti-freeze and overheating protection, regardless of your fuel choice.
installation
Both models are designed for indoor installation and include standard 1/2" NPT water fittings. They come with a gas pipe, inlet and outlet pipes, and a 2.5" horizontal vent pipe. The dimensions are exactly 21.7 x 13.8 x 13.8 inches for both units. Installation requires proper ventilation and a smoke exhaust pipe for safe operation. They operate at just 3.6 PSI of water pressure. The setup process is hassle-free for either fuel type, allowing for quick placement in homes or apartments without significant structural modifications.
model variations
Product B offers more variation options compared to Product A. The natural gas model has five variations available, including different sizes and colors. It also lists a 20L outdoor option and a 16L rectangular display variant in its broader lineup. Product A has four variations, limited to 18L and 16L sizes in white or gray. If you need specific size adjustments or alternative display styles, the natural gas line provides more flexibility. This variety allows for better customization based on your specific space or aesthetic preferences.
Which VELPAX Model Fits You
Users with existing natural gas lines
This model runs on natural gas (LNG). It delivers 4.74 GPM at 68,000 BTU/hr. The indoor design fits standard spaces. You get steady temperature control from 95°F to 149°F. Safety features include anti-freeze and overheating protection. Choose this if your home is already connected to a natural gas supply for seamless integration.
Users with propane tank supplies
This unit is built exclusively for propane (LPG). It provides the same 4.74 GPM flow rate and 68,000 BTU/hr output. The stainless steel body and copper tank ensure durability. It operates at low water pressure of 3.6 PSI. Select this option if you rely on propane tanks for your heating needs.
Renters in small apartments
Both models share the same compact dimensions of 21.7 x 13.8 x 13.8 inches. This space-saving design suits small cabins or remote apartments. The LED display allows precise temperature adjustments. You save over 50% space compared to tank models. Pick the propane version if you need a portable solution without permanent gas line installation.
The products compared
VELPAX 4.74 GPM Indoor Propane Water Heater
Best for: small indoor spaces with propane access
- Fuel Type
- Propane
- Flow Rate
- 4.74 GPM
- BTU
- 68,000 BTU/hr
- Installation Location
- Indoor
- Temperature Control
- 95°F to 149°F
- Dimensions
- 21.7 x 13.8 x 13.8 inches
View on Amazon: VELPAX 4.74 GPM Indoor Propane Water Heater Affiliate link
This indoor unit delivers 4.74 gallons per minute using propane fuel. It features a 68,000 BTU output and an oxygen-free copper water tank for efficient heating. The stainless steel body includes anti-freeze and overheating protection. You get precise temperature control between 95°F and 149°F. It fits well in small spaces like cabins or apartments where gas lines are available.
Pros
- High flow rate of 4.74 GPM for simultaneous use
- 68,000 BTU/hr heating output
- Oxygen-free copper water tank for durability
- Low water pressure operation at 3.6 PSI
- LED digital display for easy temperature adjustment
Cons
- Indoor installation only
- Requires specific propane gas connection
- Limited to 18L model size
Good fit if
- You need hot water for a bathroom and kitchen simultaneously
- You have access to propane fuel supply
- You want a compact unit for a small space
Skip if
- You require outdoor installation
- You use natural gas instead of propane
- You need a higher flow rate than 4.74 GPM
Verdict: VELPAX 18L Propane Tankless Water Heater suits small households needing reliable indoor hot water. It works best for users who already have propane lines and want a compact, efficient solution.
VELPAX 4.74 GPM Indoor Natural Gas Tankless Heater
Best for: Indoor multi-point use with low pressure
- Fuel Type
- Natural Gas
- Flow Rate
- 4.74 GPM
- BTU
- 68,000 BTU/hr
- Installation Location
- Indoor
- Temperature Control
- 95°F to 149°F
- Dimensions
- 21.7 x 13.8 x 13.8 inches
View on Amazon: VELPAX 4.74 GPM Indoor Natural Gas Tankless Heater Affiliate link
This indoor unit delivers 4.74 gallons per minute using natural gas. It features a 68,000 BTU burner and operates on just 3.6 PSI of water pressure. The stainless steel body and oxygen-free copper tank provide durability. You get precise temperature control between 95°F and 149°F. It fits two to three points of use simultaneously. The compact design saves space in small cabins or apartments.
Pros
- Delivers 4.74 GPM flow rate
- Operates at low 3.6 PSI water pressure
- Stainless steel and copper construction
- Precise digital temperature control
Cons
- Indoor installation only
- Limited to natural gas fuel
- No outdoor weatherproofing
Good fit if
- You need hot water for multiple fixtures
- You have low water pressure
- You want a compact indoor unit
Skip if
- You require outdoor installation
- You use propane fuel
- You need higher flow rates
Verdict: VELPAX 18L Natural Gas Tankless Water Heater suits homes needing reliable indoor hot water for multiple uses. It handles low pressure well and offers durable materials. You get steady temperatures without the bulk of a tank.
Specifications side by side
| Spec | VELPAX 4.74 GPM Indoor Propane Water Heater | VELPAX 4.74 GPM Indoor Natural Gas Tankless Heater |
|---|---|---|
| Fuel Type | Propane | Natural Gas |
| Flow Rate | 4.74 GPM | 4.74 GPM |
| BTU | 68,000 BTU/hr | 68,000 BTU/hr |
| Installation Location | Indoor | Indoor |
| Temperature Control | 95°F to 149°F | 95°F to 149°F |
| Dimensions | 21.7 x 13.8 x 13.8 inches | 21.7 x 13.8 x 13.8 inches |
| Size | 18L | 18L |
| Color | White | White |
| Model | HWRSQ-18L-001 | HWRSQ-18L-002 |
Frequently asked questions
Can I install the VELPAX propane unit outdoors?
No. The VELPAX 4.74 GPM Indoor Propane Water Heater is designed strictly for indoor use. Its construction and safety features are not rated for outdoor exposure. You must place it in a sheltered area with proper ventilation. This model protects your home from weather damage while providing reliable hot water.
Do both VELPAX models fit in the same space?
Yes. Both the propane and natural gas versions share identical physical dimensions. Each unit measures 13.8 inches in width and length, with a height of 21.7 inches. You can swap either model into an existing indoor footprint without modifying your installation space or piping layout significantly.
Which VELPAX heater is better for low water pressure?
The natural gas model handles low pressure well. The VELPAX 4.74 GPM Indoor Natural Gas Tankless Heater is specifically noted for its ability to maintain performance under low pressure conditions. This makes it a practical choice for homes with weaker municipal water supply or older plumbing systems.
What is the difference between model HWRSQ-18L-001 and 002?
The difference is the fuel source. Model HWRSQ-18L-001 is the propane unit, while HWRSQ-18L-002 is the natural gas unit. Both are 18L size and share the same white finish and indoor design. You must choose the model that matches your home’s available gas line type.
Is the VELPAX propane heater suitable for small households?
Yes. This unit is best for small indoor spaces with propane access. It provides a compact solution for households needing reliable hot water without bulk. The 4.74 GPM flow rate supports typical daily needs for small families or apartments with existing propane infrastructure.
Can I use the natural gas heater for multiple bathrooms?
Yes. The natural gas model suits indoor multi-point use. It delivers steady hot water for several fixtures simultaneously. Its durable materials and consistent temperature control make it ideal for homes where multiple showers or sinks operate at the same time.