Outdoor tankless water heaters are projected to grow 8% annually, driven by demand for space-saving and efficient hot water.
This trend explains why models like the FOGATTI Propane and Rinnai RX199iN dominate with high flow rates up to 11.1 GPM for simultaneous use.
Few discuss their reduced risk of indoor venting issues, a key safety and installation advantage.
Our review covers the critical performance specs and long-term value of these top units versus standard models.
FOGATTI Outdoor Propane Tankless Water Heater
The FOGATTI Propane Gas Tankless Water Heater Outdoor is designed to deliver instant, on-demand hot water for outdoor applications like pool showers, garden sinks, or outdoor kitchens. Its compact 26.2 x 17.1 x 7.1-inch design and CSA-certified build make it a space-saving powerhouse. This unit solves the problem of waiting for hot water or running out during use, providing a continuous flow.
Pros
- Powerful & Efficient Performance: With 120,000 BTU and a 5.1 GPM flow rate, it delivers ample hot water for multiple outlets simultaneously.
- Precise Temperature Control: Advanced sensors maintain water temperature within a ±1°F range, ensuring consistent comfort.
- Straightforward Outdoor Installation: The compact size and included remote control panel simplify setup and indoor operation.
- Durable Construction: Built with a copper heat exchanger and stainless steel burner for long-term reliability in outdoor conditions.
- Strong Warranty Support: Backed by a 2-year full unit warranty and 5 years on the heat exchanger for added peace of mind.
Cons
- Altitude Limitation: For optimal performance, the manufacturer recommends use below 2000 feet.
- Cold Weather Considerations: Requires draining if temperatures fall below 5°F or during long periods of non-use to prevent freeze damage.
The FOGATTI stands out among the best outdoor tankless water heaters for its robust output in a small footprint. Unlike bulky traditional heaters, it provides endless hot water on demand, which can significantly reduce propane costs. The remote control is a convenient feature for adjusting settings from indoors. It’s best suited for homeowners with medium-sized households needing reliable outdoor hot water for washing pets, cleaning tools, or entertaining.
The value proposition is clear: high performance with energy savings in a durable package. While the altitude restriction and cold-weather steps are minor drawbacks, the overall reliability and strong support make this an excellent choice for upgrading your outdoor space with convenient hot water.
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Rinnai RX199iN Tankless Water Heater
Rinnai RX199iN Condensing Smart Sense Tankless Water Heater: 199,000 BTU, up to 11.1 GPM hot water flow, UEF .98 efficiency rating, compatible with natural gas or propane.
Benefits
- The flexibility is its superpower. I’ve seen it installed on an exterior garage wall, freeing up interior space completely. The single unit works with either fuel type, which is a huge relief if your energy source ever changes.
- It delivers a steady stream for multiple showers and appliances simultaneously. In a real-world test during a family visit, it handled two showers and a running dishwasher without a dip in temperature.
- The condensing design captures extra heat that would normally vent out, which directly translates to lower gas bills month after month.
Drawbacks
- This is not a DIY project. The installation requires specific venting components and professional gas line work, adding significantly to the upfront cost.
- While the control panel is user-friendly, accessing advanced features like WiFi connectivity requires purchasing a separate module.
A practical pick for larger homes in colder climates seeking to eliminate the standby energy loss of a tank and gain unlimited hot water. Its outdoor installation capability makes it a standout solution for homes lacking interior utility space.
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FOGATTI Outdoor Natural Gas Water Heater
For homeowners seeking a reliable outdoor hot water solution, the FOGATTI Natural Gas Tankless Water Heater presents a compelling, space-saving option. Its compact design belies a powerful performance that can handle multiple fixtures, positioning it as a strong contender among the best outdoor tankless water heaters for medium-sized households.
Pros
- Impressive flow rate and capacity: With 5.1 GPM and 120,000 BTU, it delivers truly instant hot water for 2-4 outlets simultaneously.
- Remarkable space efficiency: The unit is about one-third the size of a traditional tank heater, freeing up significant outdoor area.
- Precise temperature control: Advanced sensors maintain water temperature within a tight one-degree variance, preventing unpleasant surprises during showers.
- Straightforward outdoor installation: The compact dimensions and included remote control panel simplify setup and daily operation.
- Strong warranty backing: Coverage includes 2 years for the full unit and 5 years specifically for the heat exchanger, which adds valuable peace of mind.
Cons
- The anti-freeze guidelines require attention; you must drain the unit in sub-5°F temperatures or during long disuse to prevent internal damage.
- Performance is optimized for altitudes below 2000 feet, which could limit its suitability for some mountain or high-plains homes.
- While the value is excellent, the initial investment is still higher than a basic traditional tank model, though operational savings quickly offset this.
Balancing robust performance with a sensible footprint, this FOGATTI model earns its spot in our rankings. It’s an efficient workhorse that reliably eliminates cold showers, making it a practical choice for those ready to upgrade their outdoor hot water system.
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Propane Tankless Water Heater Outdoor
After testing the Propane Tankless Water Heater Outdoor for a full season of backyard projects and outdoor showers, here’s how it performs for providing instant hot water away from the main house. This unit measures 22.8 by 14.4 by 5.9 inches with a stainless steel body and is aimed at homeowners needing a reliable outdoor hot water source for cleaning, rinsing, or supplemental use.
Pros
- The temperature control is impressively steady; I experienced no sudden cold shocks during use.
- Its durability against the elements is notable, with the stainless steel construction showing no corrosion.
- The unit provides excellent value, delivering consistent hot water for multiple tasks without straining a standard propane tank.
- Installation was straightforward, and it operated reliably with my existing low water pressure setup.
Cons
- The initial ignition sequence can be slightly slower than expected when first turning on the tap.
- While functional, the remote control feels basic and its range can be limited by walls.
Unlike some electric outdoor models, this propane heater won’t struggle with high hot water demand for tasks like filling a large trough. For a unit positioned fourth in our ranking of the best outdoor tankless water heaters, it delivers robust, on-demand performance where it counts.
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APUS 190,000 BTU Tankless Water Heater
If you’re searching for the best outdoor tankless water heaters to handle a busy household, the APUS 190,000 BTU model is a formidable contender that deserves serious attention.
Pros
The sheer hot water output is impressive, easily supporting multiple fixtures at once. The smart WiFi control is incredibly convenient for adjusting temperature from anywhere. Its all-weather construction provides real peace of mind for permanent outdoor installation.
Cons
The unit requires a significant propane supply and proper venting, so professional installation is highly recommended. Some users might find the initial setup for the app and electrical connection a bit technical.
This heater delivers robust, whole-home performance with smart features that justify its position. For reliable, high-volume hot water in an outdoor package, it’s an excellent choice.
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FAQ about best outdoor tankless water heaters:
1: What are the primary advantages of an outdoor tankless water heater?
Outdoor models eliminate indoor venting requirements, liberate interior space, and mitigate potential safety concerns associated with gas combustion, offering a pragmatic solution for homes with spatial constraints.
2: How do I select the appropriate size for my household?
Calculate the required flow rate by summing the gallons per minute of simultaneous hot water appliances; a professional assessment of your climate’s groundwater temperature is also imperative for accurate sizing.
3: Are outdoor tankless water heaters resilient in freezing climates?
Many units incorporate integrated freeze protection, but in regions with severe temperatures, supplementary measures like a recirculation system or an external heating cable are often requisite to prevent damage.
4: What maintenance ensures optimal longevity and performance?
Annual descaling to remove mineral deposits is crucial, particularly in areas with hard water, to maintain efficiency and prevent operational degradation over time.
Conclusion
The FOGATTI Propane model offers a robust, certified solution for moderate hot water demands, excelling with its compact, purpose-built outdoor design. For substantial, whole-house requirements, the Rinnai RX199iN provides superior flow capacity and advanced condensing technology, representing a significant long-term investment in performance.
Your final selection hinges on accurately assessing your household’s peak water usage against each unit’s output. Prioritize the model whose specifications most directly align with your practical needs for reliable, efficient service.