Users simply need to select their property type and input its zip code, fixture count, and desired outlet temperature online at telliSize. Then, the calculator uses real-world data from similar properties and runs an advanced dynamic mathematical model on cloud computers using parallel computing technology. The users are emailed configuration options within three business days.

Since states, like New York and California, banned the use of natural gas in commercial buildings, heat pump water heaters are the most viable solution for the future. However, heat pump technology’s performance is tied to external parameters that change constantly, including the weather, ambient air temperature, ground water temperature, price of electricity (which fluctuates hourly), and hot water consumption patterns.

“Until now engineers could not confidently or accurately determine how many heat pumps a specific application will need, and how the entire system will perform,” said Intellihot Chief Technology Officer Siva Akasam. “The current methodologies are fraught with assumptions and prone to errors. They either oversize or undersize applications, resulting in excess space and power needs, or failure to meet hot water demand. Now they have a sizing tool that’s guaranteed.”