The Greentherm 9000 gas tankless water heater offers a UEF efficiency rating up to 0.96, top water connections for easy tank replacement and an industry-leading warranty, the company says. The colorful, clear text display and app make it easier than ever to control a water heater.
Product Focus: Tank & Tankless
Bosch Thermotechnology gas tankless water heater
![Bosch Thermotechnology gas tankless water heater](http://www.pmmag.com/ext/resources/Issues/2022/09-September/prod01-PM0922_Products_Bosch-780.jpg?1662062628)