920 ES Series High Output Condensing Tankless Water Heater
Residential and Commercial Models Available


Bosch Tankless Water Heater at Just TanklessThe Bosch 920 ES Series is our newest ultra-high efficiency condensing tankless water heaters. With outputs as high as 9.2 gallons per minute at a 45°F degree raise, these heaters can satisfy virtually any demand for hot water. These heaters have inputs greater than 200,000 BTU/hr, so they are not eligible to participate in the Energy Star program, but with a thermal efficiency of 94%, they are extremely efficient.

Features & Benefits

  • 94% thermal efficiency
  • Modulating/condensing for comfort and high efficiency
  • 225,000 BTU/Hr maximum input,
  • 25,000 BTU/Hr minimum input
  • ASME certified
  • Direct vent, vertically or horizontally with 3" PVC, CPVC or ABS-DWV
  • Concentric and twin pipe venting options
  • Electronic ignition
  • Will deliver up to 36.8 gpm in a 4-unit cascade
  • Solar application-ready
  • Built for durability and serviceability
  • Available for natural gas (NG) and liquid propane (LP)