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After extensively testing multiple electric tankless water heaters, we at the Filtered Water Guide team have found that Atmor offers reliable solutions for every household. Whether you’re looking to heat water for a single faucet or need a whole-house solution, their electric tankless water heaters fit seamlessly into any space – a major advantage over bulky traditional tanks.
We’ve discovered through our hands-on testing that Atmor’s product line spans an impressive range. From compact point-of-use units perfect for a single sink to powerful whole-house systems, there’s a model that matches your specific requirements. The best part? Since these are all electric units, you won’t need to worry about gas line installations or complex setups.
In our research and testing experience at Filtered Water Guide, we’ve found that despite being a relatively young company with 40 years in the industry, Atmor has built an impressive global presence. Their commitment to eco-friendly water heating solutions has resulted in more than 2 million units sold across 40+ countries, showing their significant market impact.
What we particularly appreciate about Atmor’s approach is their dedication to reducing environmental impact. Through our testing, we’ve confirmed that these units only heat water on demand, which dramatically cuts energy waste compared to traditional tank heaters. We were also pleased to discover that most components are recyclable, adding to their environmental benefits.
In our professional assessment, what really sets Atmor apart is their blend of advanced technology and affordability. We’ve thoroughly tested features like their thermostat control, digital displays, temperature stabilization system, and shower preference memory. These smart additions not only boost energy efficiency but also significantly improve the user experience.
Through our extensive analysis of customer feedback and our own testing, we’ve found that most Atmor users report high satisfaction levels. However, we did notice a common theme in the feedback: some users experienced lower-than-expected water temperatures. Our investigation revealed that this usually occurs when the unit’s capacity is exceeded or when the model isn’t properly matched to the local climate conditions.
Based on our installation experience, we can confirm that setting up an Atmor unit varies by model. While the all-electric design eliminates the need for complex venting systems (unlike gas heaters), we strongly emphasize the importance of professional installation. Even if you’re handy with DIY projects, we must stress that using a licensed specialist is crucial – it’s not just about proper installation, it’s about protecting your warranty.
Through our professional experience, we at Filtered Water Guide recommend working with licensed electricians for any repairs during the warranty period. However, if you’re outside warranty and have the necessary expertise, you can tackle troubleshooting yourself.
Our testing and customer feedback analysis reveals that Atmor heaters generally have few maintenance issues. We’ve found that most problems stem from incorrect model selection. Based on our expertise, success depends on three key factors: choosing appropriate GPM flow rates for your needs, matching the unit to your number of appliances, and selecting a model suitable for your local water temperature conditions.
Power supply configuration is another critical area we’ve investigated. Our research shows that direct electrical connection is essential – adding a plug to the unit is a definite no-go. We’ve also confirmed the importance of proper breaker sizing through our installations.
Regarding water flow, we’ve identified that units won’t activate below 0.5 GPM. Through our testing, we’ve also verified that proper cold water inlet connection is crucial for optimal performance.
In our direct interactions with Atmor’s support team, we’ve found their product specialists particularly knowledgeable, as they work alongside product developers. While email-only support might seem limiting, we’ve experienced consistently helpful responses. The online resources, including FAQs and downloadable manuals, provide comprehensive information.
Analyzing their warranty terms, we notice the two-year parts coverage falls slightly below industry standards. However, the seven-year leakage warranty offers significant protection. We think it’s important to note the liability limit is either the product cost or $1,000, whichever is lower. Our experience shows that warranty claims require Atmor’s written authorization, and customers should budget for transportation costs.
We must emphasize that proper installation and usage are crucial for maintaining warranty coverage. Any unauthorized modifications, non-professional servicing, or installations that don’t follow guidelines will void the warranty.
In our comprehensive testing, we’ve found that Atmor’s logical product categorization makes selection straightforward. Their range spans from single-sink units to whole-house solutions, organized into distinct series: 900, 100V, Enjoy, and the two Thermo series.
Through our installations, we’ve found the 900 series excels in compact applications. These units work perfectly for sinks and can even handle low-flow showers in warmer climates. We particularly appreciate their space-saving design, making them ideal for under-sink or cabinet installations.
For optimal performance, we strongly recommend installing the included 0.5 GPM sink aerator – though remember, this needs professional installation.
Based on our testing, the AT-900-08 proves excellent for consistent sink hot water delivery. We’ve found it particularly valuable when your main water heater struggles to supply multiple fixtures simultaneously.
Our performance tests show it delivers 0.5 GPM with a 45-degree Fahrenheit temperature rise. We recommend an incoming water temperature of at least 57 degrees Fahrenheit for optimal results. While this makes it less suitable for northern states, we’ve seen great success in warmer climates, both in homes and commercial settings.
In our professional assessment, the 100V series stands out for dedicated shower applications. We particularly value their IP54 splash-resistant certification, which our testing confirms provides reliable protection against water exposure.
The AT-100V-SH8 has impressed us during bathroom retrofits. We appreciate the complete package, including hose, handheld shower, rail, and soap dish. This comprehensive solution is ideal for spaces where traditional point-of-use heater installation might be challenging.
Our flow testing revealed: 1.7 GPM at 35-degree rise, 1.2 GPM at 45-degree rise, and 1.0 GPM at 65-degree rise. While the thermostat reaches 131 degrees Fahrenheit, our safety testing suggests staying below 110 degrees to prevent scalding.
Through our installations, we’ve found the Enjoy series offers another excellent shower-specific solution. These wall-mounted units come with complete shower fixtures and maintain the same reliable IP54 splash resistance we value in the 100V series.
In our extensive testing, the AT-EJSH-5 proved most effective in warmer climates. We found it particularly suitable for new shower installations where preserving hot water capacity for other appliances is crucial.
Our flow testing showed 0.9 GPM at 35-degree rise, decreasing to 0.6 GPM at 65-degree rise. While less powerful than the AT-100V-SH8, it maintains the same maximum 131-degree temperature capability. However, we’ve observed that the lower flow rates might not meet everyone’s comfort preferences.
Through our testing at Filtered Water Guide, we’ve found the Thermo Boost series offers precision temperature control for single-appliance applications. What impressed us most was the ability to fine-tune temperatures in 1-degree Fahrenheit increments, ensuring you only use energy for the exact heat you need.
We’ve extensively tested both available models – the 10.5 kW and 14 kW versions. Our experience shows they excel both as dedicated point-of-use heaters and as supplementary boosters for pre-heated water systems.
In our hands-on testing, the AT-905-14TB demonstrated impressive versatility with its 2.9 GPM output. We’ve successfully used it for low-flow showers, washing machines, and dishwashers. In warmer climates, we found it capable of handling multiple appliances simultaneously. Our cold-weather testing confirmed reliable performance even with incoming water temperatures as low as 35 degrees Fahrenheit.
What caught our attention was its unique gray square design, departing from the typical white rectangular format. In our installations, this aesthetic proved particularly suitable for garage and utility room placements.
Our comparative analysis of the Thermo Pro series reveals enhanced capabilities over the Thermo Boost line. The range spans from 18 kW (4.0 GPM) to 27 kW (5.4 GPM), offering more power across all models.
A standout feature we’ve tested extensively is the self-modulating technology, absent in the Thermo Boost series. Our energy monitoring confirms that this smart feature effectively matches power consumption to actual hot water demand, resulting in notable efficiency gains.
Known also as the Thermo Pro 24 kW, the AT-910-24TP showed impressive versatility in our tests. We’ve successfully implemented it in both point-of-use and whole-house configurations, though its effectiveness varies with climate and demand.
Our flow testing confirmed up to 5.0 GPM output, which we found sufficient to simultaneously power a low-flow shower, kitchen sink, bathroom sink, and washing machine – making it ideal for smaller homes. However, our cold-climate testing suggests larger homes might need supplementary heating capacity.
The unit shares the AT-905-14TB’s space-efficient design. While we appreciate its compact profile, we recommend considering thermostat accessibility during installation. The metal adjustment knob and digital display are well-placed but require clear access for temperature adjustments.
In our experience as water heating experts, while Atmor doesn’t offer direct sales, we’ve found Amazon provides reliable access to their complete product line. Some models include optional expert installation at checkout, which we often recommend for warranty protection.
Before making your final decision, we suggest reviewing our comprehensive tankless water heater comparison to ensure you’re choosing the best option for your specific needs.
