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
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
Water Heater
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
Gas Tankless Water Heaters
Therm C 1210 ESC
Highest performance, efficiency and flow rate.
- Up to 98% thermal efficiency
- 225,000 BTU maximum input
- 12.1 gallons per minute capacity at 35F degree rise
- ASME certified
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