Model 3 Tankless Electric Water Heater

Here is the link to download the User Guide and Installation Manual V2. Use this one if your MODEL 3 has “_REVF” or later on the product sticker located on the bottom of the unit..

Though not required, we highly recommend that you download the Heatworks app and connect the MODEL 3 to your Wi-Fi network at the time of installation or as soon as wireless internet is available. Connecting the MODEL 3 to your Wi-Fi network will allow our team to update your MODEL 3 over-the-air, ensuring your product is always operating with the most recent version of software. Also, you will be able to take advantage of additional features such as being able to remotely control temperature settings. It should be noted that the Heatworks App is only supported on the Apple and Google Play stores. Amazon or Microsoft app stores do not have a version of the Heatworks app available currently.

No. Heatworks products are designed for use with potable water only. We do not recommend using our products with unapproved chemicals or with water containing chemicals. Please contact Heatworks before using any chemicals with your Heatworks product or using the product for any application outside of what is described in the User Guide & Installation Manual so not to void your warranty.

Yes. The MODEL 3 has a minimum activation rate of 0.4 GPM.

Some competitors have minimum activation rates up to 0.75 GPM, depending on manufacturer and model. An activation rate above 0.5 GPM means that even a low flow fixture, such as a hand sink, may not trigger the tankless water heater to begin heating. With an activation rate of 0.4 GPM, we provide our customers with hot water, even at lower demand hot water draws.

No. All Heatworks products run on AC power. You can use an inverter (which converts DC power to AC power) to run Heatworks water heaters. The inverter needs to be at least as large as the kW of power needed to produce the desired amount of hot water at the desired temperature.

Heatworks requires a licensed plumber and electrician to install the MODEL 3 water heater. In some areas, HVAC professionals may have both plumbing and electrical licenses under the same roof. It is required that any licensed installer read the User Guide and Installation Manual prior to installing the unit. Additionally, all water lines in the plumbing system need to be flushed of debris entirely before installing the MODEL 3 for both retro-fit and new construction projects. This is required to keep all foreign matter from entering the MODEL 3. Failure to do so prior to installing the MODEL 3 will void the warranty.

Unfortunately, we cannot provide you with an exact cost of operation as that number will vary depending on your location and application. The MODEL 3 is a non-continuous device and only draws power when there is a need for hot water. Meaning, the MODEL 3 does not continue to draw power once hot water is turned off. According to the U.S. Energy Information Administration, 14% of the average American household energy costs are devoted to water heating. The MODEL 3 Water Heater is designed to be 99% energy efficient and can reduce the overall cost of water heating by up to 40% compared to a standard electric tank. So, it can reduce the overall energy cost of a home by up to 5.6%.

The MODEL 3 is built to perform. Unlike other water heaters, it can be adjusted from 30-100 A upon installation, depending on your specific hot water needs. The higher the power setting, the more hot water you can expect.

For a unit set to 30 amps:

    - 4 gallon per minute demand will yield a 12° F rise in temperature.
    - 3 gallon per minute demand will yield a 16° F rise in temperature.
    - 2 gallon per minute demand will yield a 24° F rise in temperature.
    - 1.25 gallon per minute demand will yield a 39° F rise in temperature.

For a unit set to 50 amps:

    - 4 gallon per minute demand will yield a 20.5° F rise in temperature.
    - 3 gallon per minute demand will yield a 27° F rise in temperature.
    - 2 gallon per minute demand will yield a 41° F rise in temperature.
    - 1.25 gallon per minute demand will yield a 65° F rise in temperature.

For a unit set to 100 amps:

    - 4 gallon per minute demand will yield a 41° F rise in temperature.
    - 3 gallon per minute demand will yield a 54° F rise in temperature.
    - 2 gallon per minute demand will yield a 82° F rise in temperature.
    - 1.25 gallon per minute demand will yield a 131° F rise in temperature. 

Click here to download the MODEL 3 Expected Temperature Rise chart to see what temperature rises you can expect at different voltages, amperages, and flow rates.

No, not at this time. Pool water heaters fall under a different category of UL standards and are tested accordingly. We have not yet tested the MODEL 3 as a pool heater; however, we do plan to put our units through the appropriate UL testing for this application when possible.

No. We have not yet tested our products for specific use on boats. Further, salt water should never be heated with any Heatworks products.

No, not currently. We have not yet tested our products with fish tanks.

No. Heatworks products will not function properly with GFCI, GFI, RCB, RCD, or any other ground-fault breakers. Because the water coming out of our products is grounded, there are current characteristics unique to the water heaters that cause these types of breaker to trip when the unit first powers up. We do not recommend using ground-fault breakers with Heatworks products.

No. At this time, the MODEL 3 is only certified to be installed within the United States. Any installations outside of the United States will void the MODEL 3's warranty. While we do plan on selling the MODEL 3 internationally, we do not yet have a timeline for when that will occur, unfortunately. If you would like to check in for updates, please sign up for our mailing list. You can do so at the bottom of this page!