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Description
240-Volt 3.5 kW 0.53 GPM Compact Point-of-Use Tankless Electric Water HeaterAQM tankless water heaters heat water instantaneously and endlessly at 99% efficiency as it flows through the unit. Unlike water heaters with a tank, they save energy because they have no stand by energy losses. AQM tankless point of use models excel at supplying warm water at a constant temperature for hand washing at a sink but must be carefully matched to the flow rate of the sink to operate properly. They are ideal for residential or commercial
AQM tankless water heaters heat water instantaneously and endlessly at 99% efficiency as it flows through the unit. Unlike water heaters with a tank, they save energy because they have no stand-by energy losses. AQM tankless point-of-use models excel at supplying warm water at a constant temperature for hand washing at a sink but must be carefully matched to the flow rate of the sink to operate properly. They are ideal for residential or commercial hand-washing sink applications. The sleek, small design allows installation with the unit visible. Venting is unnecessary. Refer to the Sizing Guide and Temperature Rise Chart to determine the correct size you need. Call AquaPower at 800.582.2213 if you have any sizing questions. Meticulously engineered and carefully manufactured, AQM tankless water heaters are designed for years of trouble-free and energy-saving usage.- AQM 4-2 is designed to provide warm water around 90° to 100° for hand washing at a standard-flow (0.66 GPM) lavatory sink
- Requires hard wiring to 240 or 208-Volt electric service with 1 dedicated 15 Amp breaker and 14-Gauge copper wiring
- Provides endless warm water for hand washing at 99% efficiency and saves energy because water is heated only when needed
- Important to carefully match the AQM model to the flow rate of the sink
- Engineered in Germany with the best materials to provide years of trouble-free service
- A special flow switch control protects the nichrome heating element from failure caused by dry-firing
- Can be installed above or below the sink with water fittings pointing either up or down
- Not designed for use at a kitchen sink or a shower, or as a booster heater for any application
- Professional installation recommended
- 5-year leakage and 1-year parts residential and commercial warranty against defects in workmanship and materials under normal use
Features
| Item Weight | 3.44 |
| Minimum Activation Rate (gpm) | .40 |
| Uniform Energy Factor | 0 |
| Water Heater Features | Overheat Protection |
| Required Volt Connection | 240 volt |
| Application Type | Point of Use |
| Flow Rate @ 55 F Rise (gallons/min) | 0.0 |
| Minimum Temperature (F) | 0.0 |
| Product Weight (lb.) | 3.44 |
| Pack Size | 1 |
| Flow Rate @ 65 F Rise (gallons/min) | 0.0 |
| Finish Family | White |
| Wattage (watts) | 3500 |
| Returnable | 180-Day |
| Wattage (watts)2 | 3500 |
| Flow Rate @ 35 F Rise (gallons/min) | 0.68 gal (US)/min |
| Maximum Temperature (F) | 0.0 |
| Heat Exchanger Warranty | 5 Year |
| Amperage (amps) | 14.6 |
| Fuel Type | Electric |
| Indoor/Outdoor | Indoor |
| Flow Rate @ 45 F Rise (gallons/min) | 0.53 |
| Water Connection Size (in.) | 3/8 Comp |
| Product Height (in.) | 6.5 |
| Product Depth (in.) | 3.25 |
| Product Width (in.) | 7.5 |
| Part Warranty | 1 Year |
| Labor Warranty | No Warranty |
| Certifications and Listings | CSA Listed,ETL Listed,UL Listed |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.7 ★★★★★
Based on 23 reviews
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Product Reviews
★★★★★ 5
Great addition to our coffee station.
Size: EK6002
Love it. It's accuracy might be a little fuzzy about measuring the last tenth of a gram, probably due to rounding. But it showed a difference when a single coffee bean was added. Easy to read. The removable pad makes it easier to clean. It fits right on my little coffee station. To be honest, I didn't read the instructions. It's fairly intuitive if you know how they are supposed to work. I like it.
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Reviewed in the United States on November 26, 2025
★★★★★ 1
Broken, after 1 week of use
Size: EK6002
Sorry but, no. Stopped working after less than 1 week of use. They pre-install cheap batteries. I used it for a few days but then It wouldn’t turn on so I switched them out with fresh ones. Now the start/stop button isn’t working. Discovered during an extraction…arg!! Don’t mess with me while performing my craft! lol. Build quality is poor. Don’t over handle it, yeah, that’s how fragile it appears to be. I like that it is light weight but so light, I question if the durability and weight factor are compromising the output accuracy. Doesn’t feel reliable at all. I also question if this is waterproof, again, having everything to do with build quality. This is not my first scale but it is for coffee use so I’m on the hunt for a better one. This was cheap in price, yes. But as the old saying goes, you get what you pay for. One good thing that came out of this is, while it was working, I realized how much this was really needed for me to make exceptional and accurate espresso shots, so time to find a better one. I wanted this to work, I really did.
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Reviewed in the United States on April 3, 2026
★★★★★ 5
4.95 stars
Color: Black
TLDR: Buy it. It works well, it has impressive and useful features, it looks great, it’s thin/low-profile, and it’s a great price.
Detailed review: I’m very happy with this scale, and it has certainly upped my espresso game by leaps and bounds. I’m able to weigh my beans very precisely down to a tenth of a gram (roughly the weight of a single bean), so my dosing is on point. Also, it fits beneath the portafilter with room to spare for my cup, so I can weigh my shots and accurately measure my input/output ratio. And automatic mode is magic! When the espresso hits the cup, the timer starts running, so I can measure flow rate along with everything else! Overall, super easy to use and very necessary for the at-home barista.
One caveat: It acted weird on the 2nd or 3rd day, and I thought I was going to have to return it. The weight would slowly creep up even though I wasn’t adding any coffee. I dusted it off, made sure it was dry, set it on a more stable surface… I still don’t know what the matter was, but it stopped freaking out and it hasn’t really given me any trouble since. Also, I should mention that the automatic function doesn’t always work 100% perfectly; it works, and usually works quite well, but depending on the flow rate, you might get some drops dribbling into the cup and the timer not detect it right away. (I think the timer must be activated according to some sort of algorithm that looks for a certain increase in a certain amount of time, so a slower initial drip rate might not trigger it at first.) Also weirdly, it seems like about half of the time when the weight stops increasing (i.e., espresso stops flowing) , the timer pauses (as I think it’s supposed to do), but other times, the timer keeps running until you manually stop it. I don’t know… It’s a weird glitch, I guess, but it doesn’t really make any difference. The weight is accurate, and that’s the primary thing to keep an eye on.
So, is it perfect? No, I guess not. But, it works extremely well and functions perfectly for my purposes. In fact, it’s a lot nicer and fancier than I expected – plus, it’s more affordable and more streamlined than its obvious rival the Acacia.
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Reviewed in the United States on June 1, 2024
★★★★★ 5
Excellent and super accurate
Color: Black, Color: Black
I had a precision oxo which was more expensive than this one but not great though, it would register .4 grams suddenly and not sensitive to the 1-2 bean increments. I bought this one for espresso specifically and man it is fantastic so accurate, super responsive, well built, size is great if you want to weigh your shot under your portafilter. I have a fellow series 1 and it’s amazing working with it. Overall highly recommend and for the price it’s amazing great value! Not sure why would I buy a bookoo for $130 or a fellow scale for $200. This one works great for $40
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Reviewed in the United States on May 11, 2026
★★★★★ 5
Just a tiny, accurate scale
Color: Black
Works flawlessly after I calibrated it compared to my other. Out of the box it was (very) off. Now it's within .1 of a gram. It's far more responsive than I expected. It's perfect for espresso and it's tiny so it fits on the smallest drip trays.
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Reviewed in the United States on May 8, 2026