Frequently Asked Questions
Ohmic Array Technology
Heatworks products operate silently, providing instant hot water without the use of heating elements. Our patented Ohmic Array Technology uses graphite electrodes in place of traditional metal heating elements. Through advanced electronic controls, the naturally occurring minerals in water are excited, directly and efficiently heating the water. With no heating elements, the only component that gets hot inside our products is the water itself, resulting in zero plating, scaling, or corroding, a longer lifespan, and no required maintenance.
Other water heaters utilize metal heating elements which fail frequently. Metal heating elements corrode, rust over time, and must reach temperatures upwards of 700-800° F to heat water sufficiently. Heating elements boil the water at the point of contact, causing minerals in the water break down and stick to them. This causes inefficiencies and shortens the time to failure. In addition to corroding and plating, higher temperatures also cause heating elements to crack, creating another failure mode. Heatworks products use graphite electrodes in place of traditional metal heating elements. Our graphite electrodes never get hotter than the water being heated, so there is no plating, scaling, or corrosion over time. This means our products do not require maintenance and have a significantly longer lifespan.
For the MODEL 3 Water Heater, the conductivity must fall between 80 to 2000 μs of conductivity. The only way to accurately check the conductivity of your water is to use a conductivity meter, which can be purchased online for under $20. Your water company should also know the conductivity of the water source.
The electric current used in Heatworks products for heating water poses no risk of electrocution to those using the water coming out of the unit. Heatworks products contain several fail-safe components to comply with safety regulations surrounding water and electricity to ensure user safety.
Hard water does not affect the performance of your Heatworks product. Heatworks products use graphite electrodes in place of traditional heating elements. Because these electrodes are made of graphite and never get hotter than the water being heated, they will never plate or corrode. This holds true even if you have harder water in your home. If your water comes from a well, we recommend installing a sand filter on the main water line entering the house from the well along with contacting DNR for information on well water supply conductivity in your area.
MODEL 3 Water Heater by Heatworks
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. 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.
No. Unlike other tankless electric water heaters, the heating technology used with the MODEL 3 Water Heater allows us to eliminate a flow switch and flow restrictor, so there is no minimum flow require to begin heating. The MODEL 3 will never heat water higher than the setpoint temperature, regardless of the flow rate.
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.
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.
Tetra Countertop Dishwasher
Tetra will be available for pre-order soon, though an exact date has not been announced. You can sign up for email updates here, and we will send you details as soon as they are available.