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Tronic 3000 US12 Electric Point-Of-Use Tankless Water Heater

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  • Provides an endless supply of hot water
  • Thermostat for improved temperature control
  • Same-day installation in most areas. Call 1-855-400-2552 by noon
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Product Details

The Bosch 12 kW tankless water heater is a point-of-use water heater that helps eliminate long waits for hot water. Ideal for isolated sink locations in a home, office, warehouse or service station. A copper heat exchanger, 98% efficiency and the ability to heat only the water you use mean that you save water, energy and money. Units are compact with flexible installation configurations.
  • Provides a continuous supply of hot water for 1 sink at a time
  • Eliminates long wait for hot water saving time and water
  • Small product footprint fits in tight spaces
  • Flexible installation - mounts on wall or under sink
  • Solid copper heat exchanger for long life
  • Overheating protection for your safety
  • UL listed for safety
  • 98% energy efficient with minimal stand-by loss
  • Must be hard-wired to a dedicated circuit
  • Must be mounted lengthwise
  • Requires 1 double pole 50 Amp
  • See models AE3.4Kw, AE7.2kW and AE9.5kW for lesser AMP needed (point-of-use)
  • 1/2 in. water connections
  • Easy to use thermostat delivers water at the desired temperature
  • 5 year limited warranty applies to residential, commercial, and industrial applications
  • Return Policy
  • California residents
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Specifications

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Questions & Answers

22Questions
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Q:Will the electrical terminals on this unit accept aluminum wire (like SEU cable)? Or will it requ...
by|Mar 27, 2021
1 Answer
Answer This Question

A:  Boss, As long as it is allowed by local codes, it can be done. Note that the current carrying capacity of copper and aluminum are different, so the wiring will need to be sized accordingly. Thusly, a professional electrician is necessary for the installation.

by|Mar 29, 2021
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    Q:is anyone recommended this tankless water heater for a 3 bedroom home
    by|Jun 22, 2020
    1 Answer
    Answer This Question

    A:  Ben, Thank you for your interest int he model Tronic model US12. At 12kW the US12 can serve as a whole house unit. It is more common for a 3 bedroom home to have our 17kW or 27kW units (WH17 & WH27). With the 12kW unit you will need to limit to a single shower in operation at any one time (such that you do not have multiple showers running simultaneously). You may also want to avoid any other large hot water loads running at the same time as the shower - the other likely example being filling up a clothing washing machine with hot water at the same time as using the shower.

    by|Jun 25, 2020
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      Q:Does this use 110 or 220
      by|Jun 16, 2020
      3 Answers
      Answer This Question

      A:  220 only

      by|Jun 16, 2020

      A:  Vicki, the model US12 works on 220v. It also requires a minimum 50 Amp breaker.

      by|Jun 16, 2020

        A:  This use 240 volts.

        by|Jun 17, 2020
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          Q:Can the it be mounted and connected directly on top for of the exciting electric water heater for...
          by|May 27, 2020
          1 Answer
          Answer This Question

          A:  no, it will only overhear your 220 volt line. this unit only increases water temp by about 30 degrees. the 4.7gpm to7.4 gpm is for the whole house. and needs its own 60 to 80 amp service. you might think about natural gas or propane, only needs 110 volts.

          by|May 29, 2020
          Showing 1-4 of 22
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          Customer Reviews

          3.6 out of 5
          (25)
          • 3.6
            out of 25 reviews
          • 40%recommend this product
          Filter by:
          Showing 1-10 of 25 reviews
          Water stopped flowing after 4 minutes
          I purchased this water heater as a replacement for my 9-year-old Bosch PowerStar Model AE12 which appears to be the same exact model. After just a few minutes, the hot water stopped flowing and I smelled something burning. I contacted Bosch technical support and we decided that I return my Tronic 3000 US12 to HD for a replacement. The new replacement unit also clogged, I again worked with Tech Support, and decided I needed to return that unit as well. I wasted a lot of time on two of these US12's. I solved my problem by spending another $100 at HD for the Steibel Eltron DHX 12-2 which was bigger but at least it installed easily and is still working fine 3 months later.
          by
          • Verified Purchase
          Restricts the water flow
          I purchased two of this US9 Busch 3000 series for two showers. I used a 8/3 gauge wire with a 40 Amp breaker. When I was flushing to get all the water bubbles, I noticed that the water coming in had a lot of pressure but in the way out the water flow was to restricted, I let it run for about 10 minutes and never changed. I tried the sink faucet and ir responded right of way, but the water flow was to low. Every time I shower, I have tried starting on cold and reach the desired temperature and it starts to get hotter and hotter that I have lower it until the flow stops and get ready for cold water. I have tried to open it full blast hot and the move it to the middle to even up the flow, and it works for few seconds, then you can feel the heat rises without moving the knob at all, the water heat gets so uncomfortable that I have to set it at 2 o´clock and it works for a few seconds, almost a minute, then it gets hot again. I lower it almost at a full could and it shuts down the hot water all of the sudden. Be ready for cold water. How can I solve this problem? Why my shower can´t sostain the same temperature throughout the shower time?
          by
          Response from Bosch ThermotechnologyJul 9, 2020
          Rilo, Your review fell under the model US12 but your text refers to the model US9, so I am hesitant to get too specific in my response. We are very sorry to hear that you have had trouble with your water heater and for the inconvenience caused. If you are willing, we would like to have a member of our team speak with you to discuss your experience and provide additional feedback. Please call 800-283-3787 and a member of our team will gladly speak with you.
            1 found this review helpful
            Flow rate of water was restricted because of the aerator screen in the new American Standard fauc...
            Flow rate of water was restricted because of the aerator screen in the new American Standard faucet. This caused the flow rate sensor not to activate and therefore no hot water. After talking with the tech support rep Brian from Bosch and helping me troubleshoot the problem, we figured out it was the aerator screen in the faucet. Now it works great! I also like the thermostat on this US12 unit. This took me some time to install because working with 6 guage wire is not easy. I used 6/2 wire with ground. Don't use 6/3. The ground with the 6/2 is what you need. The hot water comes out scalding hot for the first 3 seconds then it starts to settle down to the right temp. I'm ok with this because before we didn't have hot water for 3 minutes. My water heater is on the opposite end of the house which is why I installed the tankless. I just installed this unite 1 hour ago. My experience with customer service and tech support was excellent. Delivery was great. I was able to track the package on the Home Depot website. I included some pictures.
            by
              • Recommended
              7 found this review helpful
              Poor quality control. Comparing the internals of the new...
              Poor quality control. Comparing the internals of the new Bosch US12 that was to replace the old one that (also) failed, it appeared there was a serious drop in quality. Unit leaked internally once everything was hooked up. Replaced it with a Rheem tankless of similar wattage and its quality seems much better
              by
              • Verified Purchase
              Great for under sink or rental
              Be careful, the water gets HOT! After installing be sure to check temp settings and water balancing by running all faucets and making adjustments to get good temp without scalding.
              by
              • Verified Purchase
              • Recommended
              Rating provided by a verified purchaser...
              Rating provided by a verified purchaser
              by
              • Verified Purchase
              Rating provided by a verified purchaser...
              Rating provided by a verified purchaser
              by
              • Verified Purchase
              Rating provided by a verified purchaser...
              Rating provided by a verified purchaser
              by
              • Verified Purchase
              Rating provided by a verified purchaser...
              Rating provided by a verified purchaser
              by
              • Verified Purchase
              Very short lifetime
              Stop working after only 3 months for no reason. It was working well.
              by
              Response from Bosch ThermotechnologyJul 1, 2020
              Hello and thank you for your feedback. We are very sorry to hear that you have had trouble with your US12 water heater and for the inconvenience caused. At three months it is likely your unit is under warranty. If you are willing, we would like to have a member of our team speak with you to discuss your experience and provide additional feedback. Please call 800-283-3787 and a member of our team will gladly speak with you.
                Showing 1-10 of 25 reviews

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                Ratings
                (49)
                (25)
                (22)
                (48)
                Indoor/OutdoorIndoorIndoorIndoorIndoor
                Water Heater FeaturesWall MountedWall MountedOverheat Protection,Wall MountedOverheat Protection,Wall Mounted
                Efficiency LevelHighHigh
                Fuel TypeElectricElectricElectricElectric
                Application TypePoint of UsePoint of UsePoint of UsePoint of Use
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