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Knowledge Base

MODEL 3 Water Heater

MODEL 3 Water Heater

An internet-connected tankless electric water heater which provides instant, endless hot water for whole-home or point-of-use applications.

Why doesn't the MODEL 3 have an Energy Star label? Isn't it energy efficient?

Will hard water affect my product?

Is heating water this way safe?

Why use graphite electrodes instead of heating elements?

Installation Manual

View and download the MODEL 3 Water Heater User Manual and Installation Guide

Sizing and Applications

How do I install more than one MODEL 3?

What will be my energy use and cost of operation?

What is the expected temperature rise I can expect with the MODEL 3 Water Heater?

Can I use the MODEL 3 Water Heater to heat my pool or spa?

Can I use the MODEL 3 Water Heater to heat water on my boat?

Can I use the MODEL 3 Water Heater to heat water in my fish tank?

Is the MODEL 3 Title 20 and 24 compliant? (CA residents)

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Installation Questions

What information do I need to onboard the MODEL 3 and Heatworks app?

Is the MODEL 3 plumbing installation like other tankless electric water heaters?

What certifications does the MODEL 3 have?

Can chemicals be used in my water heater?

Does my water conductivity matter?

Is there a minimum flow rate requirement?

Can the MODEL 3 Water Heater run on DC power?

Who should install my MODEL 3 Water Heater?

Can I use a ground-fault breaker with my water heater?

Can the MODEL 3 be installed outside of the United States?

Because the MODEL 3 can be adjusted from 30 - 100 amps, how do you find the total electrical load?

I want to replace my existing electric tank but only have 200 A electrical service at my home, do I need to dedicate 100 A to the MODEL 3?

Do you always need to wire the MODEL 3 to carry 100 A even if you set it to use less power?

Can my MODEL 3 be installed outdoors?

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App Questions

What additional features are available in paid version versus the free version of the app?

How do I get the Heatworks app?

Troubleshooting

How long will the MODEL 3 Water Heater last?

What if the MODEL 3 was installed at 60 A and we need more hot water?

Resources

Register your MODEL 3 Water Heater by Heatworks

What is the estimated yearly energy cost of the MODEL 3 Tankless Electric Water Heater?

Error Codes

What is code E203?

What is code E204?

What is code E205?

What is code E301?

What is code E302?

What is code E314?

What is code E400?

What is code E900?

What is code E902?

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