forimo Tankless Water Heater Review Portable Propane Outdoor Water Heater 16L Camping

  • Delivers instant hot water with a strong output of 4.21 gallons per minute, making outdoor showers refreshing and efficient.
  • Lightweight and compact design ensures easy portability, perfect for camping, RV trips, or pet baths.
  • Equipped with multiple safety features like flame failure and anti-freezing protection for reliable and secure use.
  • Comes with a versatile shower head offering 5 spray modes and an extended stainless steel hose for convenience.
Last updated on June 1, 2025 7:32 am Details
SKU: B0BDZ193SJ Category:

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Description

Positive Features of the Tankless Water Heater

Using the forimo Tankless Water Heater 4.21GPM 16L has been quite an adventure, especially since it’s designed for outdoor use. This portable gas hot water heater impressed me right away with its compact size (13.4″ W x 21.65″ H) and lightweight build (just over 19 pounds), making it incredibly easy to carry around for camping trips or even to use in my backyard. The digital display is a handy feature that clearly shows temperature settings, so no guessing or adjusting blindly. The heater’s maximum flow rate of 4.21 gallons per minute meant I got a steady stream of hot water without annoying fluctuations, which is rare for an outdoor propane heater.

The advanced combustion technology stood out as a real perk. Despite running on propane, this model burns gas efficiently and quietly, which surprised me; many similar heaters tend to be noisy and wasteful. The maximum temperature rise of 167°F was more than enough for a hot shower, and the energy-saving feature helped keep propane use reasonable. I liked that it runs on just two D-cell batteries, so no need for plugging into electricity, which makes it truly portable.

  • Lightweight and compact design ideal for outdoor use
  • Efficient propane burner with low noise
  • Steady hot water output at 4.21 GPM
  • Easy-to-read digital temperature display

Areas for Improvement

Despite the many advantages, a few aspects of this tankless water heater gave me pause. The water pressure requirement is quite specific—needing about 3.6 PSI minimum to operate properly. In some of my testing locations, this was an issue; low water pressure meant reduced flow or intermittent heating. This could be a real downside if your water source isn’t consistent or strong.

Also, while the heater has several safety features like a flame failure device, anti-freezing protection, and overheating protection, the manual and setup instructions weren’t the clearest I’ve encountered. It took some fiddling and rechecking connections before the unit worked perfectly. Another small gripe is the lack of included batteries, which means you have to buy those separately. Not a dealbreaker, but a minor inconvenience.

  • Requires minimum 3.6 PSI water pressure, which can limit use
  • Instruction manual could be clearer for first-time users
  • Batteries for operation are not included

Design and Build Quality

Crafted with a sleek black finish, this portable water heater looks sturdy enough for rugged outdoor use. The material feels durable, and the size struck a nice balance between portability and usability. I was able to mount it easily using the included shower holder and connect the 59-inch stainless steel hose without any leaks or kinks. The five spray modes on the shower head were a surprising bonus, allowing me to switch from a gentle mist to a strong jet, which came in handy for different uses—whether rinsing off after a dusty hike or washing my dog.

Something I appreciated was the inclusion of a CSA-approved 5-foot gas regulator, which added peace of mind regarding safety and gas flow control. The three interface ports (air inlet, shower port, and water inlet) are clearly marked and well-positioned, making connections straightforward once you get the hang of it.

Performance and Usability

Performance-wise, this water heater delivers on its promise of instant hot water. The maximum heat output of 68,000 BTU/hour ensures rapid heating, and I never had to wait long for warm water. The digital display helped me keep tabs on the temperature, which made it easier to avoid scalding or cold surprises. One memorable moment was during a fishing trip when the heater provided a consistent hot shower outdoors, something I didn’t expect to be so comfortable.

The unit’s multi-protection safety features worked flawlessly in my experience. The flame failure device instantly shut off the gas if the flame went out, which reassured me during use. Anti-freezing protection was a feature I didn’t test extensively, but it’s a thoughtful addition for colder camping locations.

Alternative Offerings

Comparing this model to other portable propane tankless water heaters like the Camplux or Eccotemp units, I found it holds its own in several ways. The energy efficiency and quiet operation are better than some budget competitors, which tend to guzzle gas noisily. However, the Camplux models sometimes offer higher flow rates (up to 5 GPM), so if you need more volume for bigger groups, those might edge out this one.

On the downside, competitors often provide clearer setup guides and include batteries, making initial use less frustrating. Some rival brands also feature built-in digital thermostats with remote controls, which this model lacks. Still, the combination of good safety features, solid build, and portability make this water heater a strong contender for anyone needing a dependable outdoor hot water source.

Value Assessment

Considering the features packed into this portable tankless water heater, the price point feels reasonable. It’s not the cheapest option out there, but the advanced combustion technology and safety features justify the investment if you plan to rely on it regularly for camping, RV trips, or outdoor use. The compact design and digital temperature control add value that cheaper models often miss.

If you’re looking for a durable, efficient propane heater that can provide a steady 4.21 GPM of hot water with multiple shower modes, this product offers a solid balance between price and performance. The extra accessories like the hose and regulator reduce the need for additional purchases, which is a nice bonus.

User Experience and Practical Use Cases

I shared this heater with friends on a recent camping trip, and everyone appreciated how quickly it delivered hot water after a sweaty hike. My kid especially loved the various spray settings for the shower head, turning bath time into a fun experience even outdoors. My dog, not usually a fan of baths, surprisingly tolerated the warm water thanks to the consistent temperature control.

Using it in my RV was straightforward after solving the initial pressure setup, and the portable design meant I could easily move it around to different spots. The multi-protection features made me feel safe even in less controlled environments, which is crucial since propane appliances can be intimidating if you’re not used to them.

Downsides Worth Mentioning

A couple of things that could improve the experience: the manual could be more user-friendly and include troubleshooting tips. Also, the water pressure dependency limits use in some scenarios, especially if relying on natural water sources or weak pumps. The need to purchase batteries separately is a minor annoyance but worth noting.

Lastly, while the unit is mostly quiet, the propane burner does emit a slight hum, which might bother light sleepers during late-night showers at camp. It’s not loud, but noticeable if you’re expecting near silence.

This review reflects my hands-on experience with this outdoor propane tankless water heater. It’s a practical choice for campers, RV owners, or anyone needing a reliable source of hot water outdoors, with some minor caveats to keep in mind.

Additional information

Brand

‎forimo

Product Dimensions

‎13.4"W x 21.65"H

Special Feature

‎Lightweight

Color

‎Black

Wattage

‎12021 watts

Voltage

‎3 Volts

Maximum Flow Rate

‎4.21 Gallons Per Minute

Maximum Temperature

‎167 Degrees Fahrenheit

Heat Output

‎68000 British Thermal Units

Efficiency

‎[INF] Increased efficiency (exact value not obtainable)

Style

‎16L

Maximum Operating Pressure

‎110 Pound per Square Inch

Maximum Pressure

‎110 Pound per Square Inch

Is Electric

‎No

Manufacturer

‎forimo

Item Depth

‎5.9 inches

UPC

‎772467618622

Part Number

‎Water Heater-013

Item Weight

‎19.36 pounds

Country of Origin

‎China

Item model number

‎Tankless Water Heater

Item Package Quantity

‎1

Special Features

‎Lightweight

Included Components

‎Water Heater

Batteries Included

‎No

Batteries Required

‎No

Date First Available

September 12, 2022

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