Tankless Water Heater C 1210 ES

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Tankless Water Heater C 1210 ES

Tankless Water Heater C 1210 ES

The highest performance, fully condensing gas tankless water heater from Bosch. Unlike traditional non-condensing models, condensing technology captures heat from the exhaust gas and uses it to preheat the incoming cold water. This increases efficiency and reduces emissions – well ahead of the 2012 Low NOX emissions standards set by SCAQMD (California’s South Coast Air Quality Management District).

Therm C 1210 ES Specifications:

  • Condensing
  • Residential or Commercial Application
  • Max Input (BTU) 225,000
  • Min Input (BTU) 25,000
  • Capacity at 35°F Rise (gpm) 12.1
  • Capacity at 55°F Rise (gpm) 7.7
  • Intelligent Cascading Up to 24 Units
  • Min Flow Rate 0.5 GPM
  • Temp Range (°F) 100-140
  • Temp Stability (°F) +/- 2
  • Default Temp (°F) 122
  • Energy Factor .94
  • Thermal Efficiency 94%
  • Installation - Indoor or Outdoor (for outdoor, kit required)
  • Dimensions (w x h x d) 17 7/8" x 30½" x 11¼"
  • Weight (lbs.) 88
  • 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
  • Condensing Heat Exchanger - Aluminum
  • Venting Options PVC, CPVC, ABS, Stainless Steel
  • Vent Maximun Run 63'
  • Energy Star Rated

Features & Benefits:

  • Up to 98% thermal efficiency
  • 225,000 BTU maximum input
  • 12.1 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
  • Built in freeze protection
  • Direct vent, vertically or horizontally with PVC, CPVC or ABS-DWV
  • Concentric and twin pipe venting options
  • Can be used in solar thermal, recirculation, and space heating applications
  • Built for durability and serviceability with 15-year warranty and 20+ year life expectancy
  • Available in NG and LP models


  • 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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