Gas Tankless Water Heaters

High-efficiency gas tankless water heaters from Bosch.

High-efficiency gas tankless water heaters from Bosch offer an endless supply of hot water. Rather than storing water in a storage tank, gas tankless water heaters heat water directly through the pipes — no tank required. When a hot water faucet is turned on, cold water flows through a heat exchanger in the unit and is warmed by a natural gas burner.

This feature allows tankless water heaters to deliver a constant supply of hot water. Bosch gas tankless water heaters are built to last and have lower operating and energy costs to provide sustainable home comfort.

Water Heaters

Greentherm 9000 Series

Greentherm 9000 Series

It's time to go tankless with this innovative gas tankless water heater.

  • Space-saving, state-of-the-art tankless design
  • Ultra efficient condensing technology with UEF up to 0.95
  • Wi-Fi accessory & App increases functionality
  • Top water connections for easy tank replacement
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Water Heater

Therm Series

Therm Series

Get proven reliability with the Therm Series tankless water heaters.

  • Ultra low NOx Certified
  • Non-condensing up to 24 units
  • Available in NG and LP configurations
  • Digital display for accurate temperature setting
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