Model 3 Tankless Electric Water Heater
The world's only water heater powered by Ohmic Array Technology instead of metal heating elements.
- Endless hot water, on-demand
- Maintains its high energy efficiency for life of unit
- Precise temperature control
- Only uses power when hot water is needed
- Easy install, compact, no venting required
- Zero maintenance required
- Wi-Fi enabled, comes with mobile app to control and monitor water and energy usage
- Works in new construction or as a replacement to any gas or electric tank-type or tankless water heater
$ 899
Regular price
Introducing the MODEL 3 Tankless Electric Water Heater
Powered by our patented Ohmic Array Technology, the MODEL 3 is a smart, electric tankless water heater that provides endless hot water on-demand for houses, apartments, and points-of-use. The MODEL 3 installs like any other tankless electric water heater and can be used in new construction or as a replacement to any gas or electric tank or tankless water heater. Add it to an existing hot water system as a booster or install the MODEL 3 closer to the point of use for up to 10% in water and 25-40% in energy savings each month. But what really sets the MODEL 3 apart is how it heats water.
NOT ALL ELECTRIC WATER HEATERS ARE MADE THE SAME.
INTRODUCING OHMIC ARRAY TECHNOLOGY
Take a peek inside our electric tankless water heater. No metal heating elements here.
That 150-year-old technology has one fundamental flaw: the metal heating elements get very hot, and the minerals found naturally in the water stick to them. Limescale forms, energy efficiency is lost, and eventually the elements will fail. Instead, the MODEL 3 uses electronic controls to pass controlled electric currents through the water. This transfer converts electrical energy into thermal energy, creating endless hot water, on-demand, at the temperature you want. And because no scale forms, there is never a loss of energy efficiency. No metal heating elements to replace. No maintenance, period.
ohmic array technology
Take a peek inside our electric water heater, you won’t find metal heating elements here.
With our advanced all-electric technology, the MODEL 3 is able to monitor incoming data points and make adjustments 50-60x a sec. This means we maximize energy efficiency and use less electricity to heat water.
Using graphite electrodes and electronic controls, we pass controlled electric currents through the water. This transfer of electrical energy into the water increases the thermal energy, creating heat.
With no metal heating elements to scale or fail, no maintenance is ever required. That’s why we can offer the industry's only 6-year, full-unit replacement warranty.
The MODEL 3 Water Heater is the only water heater in the world that uses Ohmic Array Technology to heat water. All others use metal heating elements, which will rust, become covered with limescale, and eventually form hotspots. This 100-year-old technology causes sediment to form in the water, poor temperature control, and because the metal heating elements have to work harder to heat water over time, wastes energy.
The best electric water heater available on the market today.
We get it. Buying a new electric water heater is about as fun as getting a tooth pulled. That’s why we designed the MODEL 3 to be the best in its class. It heats water in the simplest, purest and most efficient way.
Ohmic Array Technology
The MODEL 3 is the only water heater in the world to use Ohmic Array Technology instead of metal heating elements to rust or scale.
Energy Efficient
The MODEL 3 is highly efficient as it only uses power when hot water is needed. Install it nearer to the point of use for up to 10% in water and 25-40% in energy savings.
Zero Maintenance
The MODEL 3 requires NO annual maintenance or NO heating elements to change out.
Worry-Free
Not only will you get endless hot water, the MODEL 3 comes with an industry-leading, 6-year full unit exchange warranty.
Control and monitor your hot water usage from anywhere.
Our WiFi-enabled mobile app allows you to remotely control the temperature of the water, monitor the amount of hot water and energy used each day in your home, and even estimate how much hot water is actually costing you. Turn the water heat down when the babysitter comes for peace of mind (or to get that teenager out of that too-long shower).
Technical Specs
Product Information
Product Information
- Weight
- 35 lbs.
- Connections
- 3/4” NPT male connections
- Digital Controls
- LED panel, Full Wi-Fi connectivity & mobile app
- Standard Warranty
- 6-year full unit exchange; Optional 4-year extended warranty available
Operating Ranges
Operating Ranges
- Voltage
- 208-240 V*
- Frequency
- 50/60 Hz
- Power
- 6.2-24 kW*
- Max Inlet Temp
- 140° F / 60° C
- Working Pressure
- 30-75 psi / (2.06 bar-5.17 bar) 206 kPa-517 kPa
- Water Conductivity
- 80-2000 µS**
- Current
- 30-100 A*
- * Note
- Unlike other water heaters, the MODEL 3 can be adjusted from 208-240 volts and 30 to 100 amps (6.2 to 24 kW) upon installation, depending on your hot water needs and existing wiring limitations. The higher the amperage/power setting, the more hot water the unit can provide. Please make sure to reference both the expected temperature rise table and installation manual to make sure you have enough power required for your hot water needs before ordering.
- ** Note
- Your water MUST be between 80 and 2000 µS for the MODEL 3 to work. Your water company can come test your water, or you can purchase a water conductivity meter that can give you a reading in as little as 5 seconds. We recommend ordering one from Amazon.
Compare Top Electric Water Heaters
Whether you are replacing an old water heater, building a new home, or adding to an existing one, there are several things you should to compare before deciding on an electric water heater. Tank vs tankless water heaters, energy efficiency and reliability are just a few.
Heatworks Model 3 Tankless Electric Water Heater
Type
Tankless
Heating Technology
Ohmic Array Technology
Wi-Fi Enabled
Yes
Maximum Temperature Rise
41° F at 4 GPM, 82° F at 2 GPM
Energy Efficiency
.94 UEF for the life of the unit
Minimal Flow Rate Required
.4 GPM
Size
11“ x 16.5” x 10”
Standard Warranty
6-year full unit exchange — No need to call a plumber or electrician, just ship the unit back and we give you a new replacement.
Maintenance Required
No maintenance required.
Mobile App
Yes
Amperage
100 A
Continuous Hot Water
Yes
Single Shower Length
Unlimited
Uses Electricity at All Times
No, only when there is a hot water draw.
Stiebel Eltron 24kW Plus Electric Water Heater
Type
Tankless
Heating Technology
Metal Heating Elements
Wi-Fi Enabled
No
Maximum Temperature Rise
41° F at 4 GPM, 82° F at 2 GPM
Energy Efficiency
.94 UEF, scaling can reduce efficiency by up to 50%2
Minimal Flow Rate Required
.5 GPM
Size
16.625" x 14.5" x 4.625"
Standard Warranty
7-year limited warrany against leakage, 3-year limited warranty against defects in workmanship and materials.
Maintenance Required
Scale build-up may need to be flushed from the unit every six months to a year. Elements may need to be replaced.
Mobile App
No
Amperage
2 x 50 A
Continuous Hot Water
Yes
Single Shower Length
Unlimited
Uses Electricity at All Times
No, only when there is a hot water draw.
Trutankless 24kW Electric Water Heater
Type
Tankless
Heating Technology
Metal Heating Elements
Wi-Fi Enabled
Yes
Maximum Temperature Rise
40° F at 4 GPM, 75° F at 2 GPM
Energy Efficiency
.94 UEF, scaling can reduce efficiency by up to 50%2
Minimal Flow Rate Required
.2 GPM
Size
23.74" x 17.2" x 5.5"
Standard Warranty
2-year limited warranty on labor and 5-year limited warranty on parts.
Maintenance Required
Scale build-up may need to be flushed from the unit every six months to a year. Elements may need to be replaced.
Mobile App
Yes
Amperage
100 A
Continuous Hot Water
Yes
Single Shower Length
Unlimited
Uses Electricity at All Times
No, only when there is a hot water draw.
Rheem Performance 40-Gallon Electric Water Heater
Type
Tank
Heating Technology
Metal Heating Elements
Wi-Fi Enabled
No
Maximum Temperature Rise
N/A
Energy Efficiency
.94 UEF, scaling can reduce efficiency by up to 50%2
Minimal Flow Rate Required
N/A
Size
20.25" x 48.5" x 20.25“
Standard Warranty
6-year limited warranty on tank and parts. 1-year in home labor warranty.
Maintenance Required
Scale build-up may need to be flushed from the unit every six months to a year. Elements may need to be replaced.
Mobile App
No
Amperage
18.75 A
Continuous Hot Water
No
Single Shower Length
53 Gallons
Uses Electricity at All Times
Yes
A.O. Smith Signature 50-Gallon Electric Water Heater
Type
Tank
Heating Technology
Metal Heating Elements
Wi-Fi Enabled
No
Maximum Temperature Rise
N/A
Energy Efficiency
.94 UEF, scaling can reduce efficiency by up to 50%2
Minimal Flow Rate Required
N/A
Size
64" x 20“
Standard Warranty
6-year limited warranty
Maintenance Required
Scale build-up may need to be flushed from the unit every six months to a year. Elements may need to be replaced.
Mobile App
No
Amperage
30 A
Continuous Hot Water
No
Single Shower Length
45 Gallons
Uses Electricity at All Times
Yes
A.O. Smith Signature 40-Gallon Electric Water Heater
Type
Tank
Heating Technology
Metal Heating Elements
Wi-Fi Enabled
No
Maximum Temperature Rise
N/A
Energy Efficiency
.94 UEF, scaling can reduce efficiency by up to 50%2
Minimal Flow Rate Required
N/A
Size
49.75" x 20.5“
Standard Warranty
6-year limited warranty
Maintenance Required
Scale build-up may need to be flushed from the unit every six months to a year. Elements may need to be replaced.
Mobile App
No
Amperage
30 A
Continuous Hot Water
No
Single Shower Length
37 Gallons
Uses Electricity at All Times
Yes
2A recent study found that over time, scale deposits can reduce the energy efficiency of water heating elements by up to 50%. Source: http://www.cwt-international.com/cwt/images/stories/Download/Vulcan/EN_How_Scale_Is_Killing_Heating_Efficiency.pdf