Tankless Water Heater 940 ES

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Tankless Water Heater 940 ES

Tankless Water Heater 940 ES

The 940 ES, Bosch highest capacity non-condensing model, designed to meet the demands of busy households, and offers premium features. This model can be installed almost anywhere thanks to its sealed combustion and dual-fan technology.

Therm 940 ES Specifications:

  • Non-Condensing
  • Residential or Commercial Application
  • Max Input (BTU) 199,000
  • Min Input (BTU) 19,900
  • Capacity at 35°F Rise (gpm) 9.4
  • Capacity at 55°F Rise (gpm) 6.0
  • Intelligent Cascading
  • Min Flow Rate 0.50 gpm
  • Temp Range (°F) 100 - 140
  • Temp Stability (°F) +/-2
  • Default Temp (°F) 122
  • Energy Factor .83
  • Thermal Efficiency 83%
  • Indoor or Outdoor (for outdoor, kit required)
  • Dimensions (w x h x d) 17 7/8" x 30½" x 11¼"
  • Weight (lbs.) 67
  • Inlet Connection ¾" NPT
  • Outlet Connection ¾" NPT
  • Gas Connection ¾" NPT
  • Max Water Pressure 150 psi
  • Min Water Pressure 30 psi
  • Min NG Presure 3.5" WC
  • Venting - Stainless Steel
  • Vent Maximun Run 61¼'
  • Energy Star Rated

Features & Benefits:

  • Highest capacity non-condensing model
  • 83%+ thermal efficiency
  • 199,000 BTU maximum input
  • 9.4 gallons per minute capacity at 35F degree rise
  • Minimum activation flow rate of 0.5 gallons per minute
  • Electronic ignition and patented burner design
  • Exclusive safety and precision controls
  • Vents vertically or horizontally with 3” or 4” stainless steel
  • Can be used in solar thermal, recirculation applications
  • Built for durability and serviceability with 15-year warranty and 20+ year life expectancy
  • Available in NG and LP models
  • Also available as an outdoor model, 940 EFO


  • 15 year limited warranty on heat exchanger; 3 year warranty if used in direct recirculating applications
  • 15 year warranty on heat exchanger if used if recirculated through a storage tank such as the Ariston mini-tank
  • 5 year warranty on all other parts


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