Gas Tankless Water Heaters

High-efficiency gas tankless water heaters from Bosch.

Enjoy the energy-efficient, endless supply of hot water that only a gas tankless water heater can deliver.

Greentherm 9000 Series
NEW
Water Heaters
Greentherm 9000 Series
  • Space-saving, state-of-the-art tankless design
  • Ultra efficient with UEF ratings up to 0.96
  • Wi-Fi accessory & App increases functionality
  • Top water connections for easy tank replacement
Therm Series
Water Heater
Therm Series
  • Ultra low NOx Certified
  • Intelligent cascading up to 24 units
  • Available in NG and LP configurations
  • Digital display for accurate temperature setting