www.pmmag.com/articles/96703-trutankless-self-flushing-tankless-water-heater

Trutankless self-flushing tankless water heater
September 25, 2014
Trutankless utilizes patented heating technology and Incoloy alloys to ensure consistent, reliable performance year after year.

Operating at nearly 100% energy efficiency, it comes with built-in breakers and multiple wiring configurations, and features a self-flushing design that eliminates most maintenance requirements.