RIWORY RV Tankless Water Heater Review: Who It Fits and Who Should Skip It
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This riwory RV tankless water heater review focuses on a propane-powered unit that delivers instant hot water without a storage tank. The RIWORY 18x18 RV Tankless Water Heater offers a maximum flow rate of 3.9 GPM and operates on DC 12V power. It uses staged combustion to reach 90% efficiency. The unit fits standard RV openings and includes a remote controller. You get on-demand heating with precise temperature control. This model replaces traditional tank heaters in many setups. It is designed for travelers who need reliable hot water while on the road. The specs support consistent performance across various conditions.
What stands out
- Maximum flow rate of 3.9 GPM for steady shower pressure
- DC 12V operation compatible with standard RV electrical systems
- Temperature range from 95°F to 124°F with automatic control
- Includes a 196-inch wall remote controller for easy adjustment
- CSA and UL certifications for pressure relief and thermal safety
Who it fits
Good fit for
This heater suits RV owners who want to replace bulky tank units with a compact alternative. The 18x18 inch door size fits many Suburban, Dometic, and Atwood installations. If you value energy efficiency, the 90% combustion efficiency extends your propane supply. The 12V DC requirement makes it ideal for standard camper electrical systems. You will appreciate the included remote controller for adjusting temperature without leaving the shower. The anti-freeze and anti-scald protections add safety for family trips or solo adventures in varying climates.
Who should skip it
You should look elsewhere if you need a gas-powered unit that runs on natural gas instead of propane. This model requires a 12V DC power source, so it will not work with 110V AC systems without an inverter. If you prefer a unit with a built-in display rather than a remote controller, this design may not suit you. The installation requires drilling holes, so those who need a no-drill solution should skip it. Also, if your RV outlet does not match the 18x18 inch door size, you must choose a different variation.
Verdict: The RIWORY RV tankless water heater provides efficient, on-demand hot water with solid safety features for standard RV setups. It is a practical upgrade for campers seeking to save space and propane while maintaining consistent water temperature.
Key specs explained
14,000-65,000 BTU
This range shows the heating power. The unit adjusts output to match demand. Higher BTU means faster heating for larger showers. You get consistent warmth without wasting propane. Compare this to lower-output units that struggle in cold weather. It ensures you have enough heat even when multiple fixtures run.
3.9 GPM
Gallons per minute indicates flow speed. This max flow supports full shower pressure. It is suitable for one person washing up. If you need two showers at once, this may limit flow. Check this against tank heaters that provide steady volume. It helps you plan water usage while traveling on the road.
DC 12V
Direct current power runs on standard RV batteries. You do not need an inverter or shore power. This keeps the unit working while boondocking. It draws power from your vehicle’s electrical system. Compare this to 120V models that need grid connection. It ensures reliability in remote campsites with no hookups.
95°F to 124°F
This temperature range lets you set precise water heat. You can choose warm or hot water. It prevents scalding while ensuring comfort. The unit maintains this range automatically. Compare this to manual knobs that fluctuate. It gives you control over shower temperature in any season.
CSA, UL
These certifications prove safety compliance. CSA and UL marks meet strict standards. They reduce fire and shock risks. You get peace of mind during use. Compare this to uncertified units that may lack protections. It ensures the device meets industry safety requirements for RVs.
Build Quality and Physical Design
The unit measures 18 inches by 18 inches by 18 inches and weighs 36 pounds. This compact cubic form fits standard RV roof openings. The listing specifies an 18x18 inch white door for this model, though other door sizes are available. You should verify your RV’s existing cutout before purchasing. The exterior finish is black, which may help hide dirt or weathering compared to lighter colors. The housing appears robust enough for rooftop mounting, but you must ensure your RV’s roof structure supports the 36-pound weight. Proper mounting is critical for safety and leak prevention.
Control layout centers around a 196-inch wall remote controller included in the package. This length allows you to place the controls inside the RV, away from the noisy and hot exterior unit. The remote lets you adjust the water temperature between 95°F and 124°F. You can set precise warmth without stepping outside. The package also includes weather stripping and mounting screws, simplifying the physical installation. You do not need to buy extra hardware for the initial setup. The waterproof design protects internal components from rain and road spray. This layout keeps your living space comfortable and dry while the heater operates efficiently.
Setup and Everyday Use
Installation relies on a 1:1 size guide included in the box. You stick the guide to your RV roof, mark drill locations, and secure the unit with screws. This method allows you to complete the setup without hiring a professional. The package includes mounting screws, weather stripping, plumbing tape, and gloves, so you need no extra purchases. The unit replaces Suburban, Dometic, and Atwood tank heaters. It fits 4-16 gallon tank openings. Door components come in three sizes to match your existing cutout.
Daily use involves DC 12V power and propane fuel. The control panel sets water temperature between 95°F and 124°F. An automatic constant temperature feature maintains this range. You do not wait for water to heat, as the tankless design delivers instant hot water. The maximum flow rate is 3.9 GPM. This supports longer showers without running out of heat. The unit includes a 196-inch wall remote controller for easy access. Safety features include a CSA-certified pressure relief valve and a UL-certified thermal cut-out. Anti-freeze and anti-scald protections activate as needed. The top-mounted forced fan aids combustion. The system adjusts for altitude, functioning smoothly at elevations up to 9,800 feet. This ensures consistent performance whether you are at sea level or on a plateau. The staged combustion technology improves efficiency, helping you conserve propane during extended trips.
Before You Buy This Unit
You should verify your RV’s roof opening dimensions before ordering. This model ships with an 18x18 inch door, but RIWORY offers 15x15 and 15x18 inch options. Check if your current Suburban, Dometic, or Atwood heater uses one of these standard sizes. The unit requires a DC 12V power source and propane fuel. You must ensure your RV’s electrical system can handle the load for the fan and controls. The package includes a 196-inch remote controller, so you do not need to buy extra wiring for placement. However, you may need plumbing tape and weather stripping, which are included, but verify your existing seals fit. Upkeep involves cleaning the exterior and checking the pressure relief valve periodically. Compared to other tankless options, this unit is designed for easy DIY installation. It fits well if you want a direct replacement for a tank model. If your RV uses a different fuel type, this propane unit will not work for you. Always confirm your altitude limits, as performance may vary above 9,800 feet.
Check before you buy
- Measure your RV roof opening to match door size options.
- Confirm your RV uses propane and has 12V DC power.
- Check if your current heater is a Suburban, Dometic, or Atwood model.
- Ensure you can access the roof for installation and maintenance.
The product at a glance
RIWORY 18x18 RV Tankless Water Heater
Best for: RV owners replacing 18x18 inch tank heaters
- Fuel Type
- Propane
- Flow Rate
- 3.9 GPM
- BTU
- 14,000 to 65,000 BTU
- Voltage
- 12V DC
- Temperature Control
- 95°F to 124°F, ±2°F
- Certification
- CSA, UL
View on Amazon: RIWORY 18x18 RV Tankless Water Heater Affiliate link
This RIWORY unit delivers instant hot water using propane and DC 12V power. It offers a flow rate of 3.9 GPM and adjustable temperatures from 95°F to 124°F. The 18x18 inch door fits standard RV openings. It includes a 196-inch remote controller for easy operation. This heater is designed for RVs and campers seeking reliable, energy-efficient hot water.
Pros
- High combustion efficiency of 90% for propane savings
- Includes 196-inch wall remote controller
- Compatible with Suburban, Dometic, and Atwood tank heaters
- Operates at altitudes up to 9,800 feet
Cons
- Heavy at 36 pounds
- Limited temperature range of 95°F to 124°F
- Requires professional plumbing for installation
Good fit if
- You need a direct replacement for a 18x18 inch RV water heater
- You want to save propane with high combustion efficiency
- You need hot water at high altitudes
Skip if
- You prefer a smaller 15x15 or 15x18 inch door size
- You need electric plug-in power without a door
- You require temperatures above 124°F
Verdict: RIWORY RV Tankless Water Heater 18x18 fits RV owners needing a propane-powered upgrade with a 3.9 GPM flow rate and remote control.
Specifications side by side
| Spec | RIWORY 18x18 RV Tankless Water Heater |
|---|---|
| Fuel Type | Propane |
| Flow Rate | 3.9 GPM |
| BTU | 14,000 to 65,000 BTU |
| Voltage | 12V DC |
| Temperature Control | 95°F to 124°F, ±2°F |
| Certification | CSA, UL |
| Dimensions | 18 x 18 x 18 inches |
| Use | RV |
| Weight | 36 pounds |
| Size | with 18" x 18" Door |
| Color | White |
| Model | RWRHT005 |
Frequently asked questions
Does the RIWORY RV tankless water heater include a remote control?
Yes, the unit features a remote control for adjusting settings from a distance. This allows you to change temperature or flow settings without climbing onto the RV roof. The remote adds convenience for users who prefer not to access the main unit directly. It simplifies operation during travel or when the roof is difficult to reach safely.
What is the maximum flow rate of this water heater?
The RIWORY model delivers a maximum flow rate of 3.9 gallons per minute. This output supports simultaneous use of multiple fixtures, such as a shower and a sink. It ensures consistent hot water supply for typical RV needs. The flow rate is sufficient for most standard showerheads and faucet setups found in recreational vehicles.
Is this unit compatible with standard RV roof openings?
Yes, the heater is designed to fit standard 18x18 inch roof openings. It replaces common tank-style heaters from brands like Suburban, Dometic, or Atwood that use this size. The unit includes an 18x18 inch door to match existing cutouts. You should verify your current opening dimensions before installation to ensure a proper fit.
How much does the RIWORY tankless water heater weigh?
The unit weighs 36 pounds. This weight is manageable for most RV roof installations. The cubic design measures 18 inches in width, height, and length. Its compact form factor helps it fit within standard roof spaces without requiring structural modifications. The weight distribution is balanced for secure mounting on typical RV surfaces.
What fuel type does this water heater use?
The RIWORY water heater runs on propane fuel. It is designed for RV use where propane is the standard energy source. The unit converts propane into heat to warm water instantly. This makes it suitable for off-grid camping or travel where electric hookups are unavailable. Propane efficiency supports consistent performance in various weather conditions.
Does the unit require AC or DC power to operate?
The unit operates on DC 12V power. This voltage matches the standard electrical system in most recreational vehicles. You can power it using your RV’s battery or 12V outlet. This ensures compatibility with existing RV wiring without needing an inverter or AC adapter. It simplifies installation by integrating directly into your vehicle’s power network.