With the Heatworks Model 1, ISI Technology hopes to have the water heater of the future.

The Heatworks Model 1 is compact enough to be installed at the point of use.
ISI Technology The Heatworks Model 1 is compact enough to be installed at the point of use.

Currently in the pre-order phase, the Heatworks Model 1 is the first all-digital tankless water heater on the market, and its patented technology delivers hot water faster and more efficiently, says the company.

Instead of using metal heating elements, an array of graphite electrodes and electronic controls heat water through an electric current. Temperature is auto-adjusted by the unit 60 times a second.

With this technology, maintenance costs for the unit are virtually eliminated, since parts won’t rust or corrode over time.

“There’s no parts to fix or heating elements to replace,” says company spokesperson Kayleigh Bohannan, adding that under the product’s three-year warranty, ISI Technology will replace the entire unit if something is faulty.

Homeowners can use the Heatworks app to monitor the Model 1 remotely.
ISI Technology Homeowners can use the Heatworks app to monitor the Model 1 remotely.

The Model 1 can be Wi-Fi enabled, so that homeowners can use any Internet-connected device to monitor one or multiple units. Users can adjust the water temperature, check the heater’s status, and view water and energy usage reports. 

The Model 1 can be used as a primary water heater or in conjunction with an existing tank system as an in-line extender or turbocharger, or as a booster at the point of use. It can also serve as an extender for a solar hot water system. When using it alongside an existing system, the unit helps to keep temperatures consistent, reduce the wait time for hot water, and lessen heating demands on the tank—therefore lowering energy costs, the company says.

To determine the best application for each home, ISI Technology uses a sizing equation that takes into account the number of hot water applications that will be running simultaneously, as well as the temperature of the groundwater. While larger homes or those in colder climates will likely need more than one Model 1 to fully meet their needs, the unit’s $475 price tag keeps the investment comparable to other products on the market.

Installation is designed to be straightforward: the compact unit, weighing in at about 10 pounds, is set in two brackets, and the plumbing connections are hooked up with ¾-inch Sharkbite fittings. The Model 1 auto-detects voltage between 100 and 277 V, and is adjustable in 5-amp increments between 15-48 amps.  

Interest in the product has been wide-ranging, Bohannon says. “Contractors, builders, homeowners, even electricians and plumbers are asking about it. We are going to do a few demo units for new construction so they see how it works.”