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Bosch Tankless Water Heater, Liquid Propane 199,000 BTU Max Condensing Whole House - Indoor, 12.1 GPM

Bosch Therm C 1210 ES LP

SKU: 826542
Our Price: $1,799.99
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Bosch Therm C 1210 ES LP


Product Information:

About the Bosch C 1210 ES LP Liquid Propane 225,000 BTU Tankless Water Heater

More efficient than traditional non-condensing models, Bosch's C 1210 ES LP Liquid Propane 225,000 BTU Tankless Water Heater captures heat from exhaust gases and uses them for preheating the incoming cold water. Not only does this system of recycling resources cut down on your electrical bill, but it also provides you with a constant, reliable flow of hot water.

Operating on 225,000 BTU, this water heater boasts a 98% thermal efficiency rate and is compatible with the following devices in your current system: solar thermal, tank loading, recirculation, radiant floor and space heating applications. Flowing up to 12.1 gallons per minute, this unit is an optimal solution to any home's water heating needs. What’s more, the Bosch 225,000 BTU Tankless Water Heater can also be cascaded with up to 24 other devices!

Decrease your emissions as well as your electrical bill with Bosch's C 1210 ES LP 225,000 BTU Tankless Water Heater, and enjoy long lasting use for over 20 years.

Additional Information:


• ASME certified
• Up to 98% thermal efficiency
• 225,000 BTU maximum input
• 12.1 gallons per minute capacity at 35F degree rise
• Cascade up to 24 units to satisfy jobs of all sizes; up to 290 GPM
• 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 tank loading, solar thermal, recirculation, radiant floor and space heating applications
• Space saving design with 100% serviceable parts and easy access


• Condensing/Non-Condensing: Condensing
• Application: Residential
• 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): 100-180
• Temp Stability (°F): +/-2
• Default Temp (°F): 122
• Energy Factor: n/a
• Thermal Efficiency: 94%
• Installation Options: Indoor or Outdoor
• Dimensions (w x h x d): 18' x 30" x 11"
• Weight (lbs.): 88
• Inlet Connection: 3/4" NPT
• Outlet Connection: 3/4" NPT
• Gas Connection: 3/4" NPT
• Max Water Pressure: 150 psi
• Min Water Pressure: 30 psi
• Min LP Pressure: 8" WC
• Condensing Heat Exchanger: Aluminum
• Venting Options: PVC, CPVC, ABS, Stainless Steel
• Vent Maximum Run: 63'
• Energy Star Rated: No

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Questions & Answers

Where do I get the compleate venting information for C 1210 ES LP SKU 826542?

by Michael F. on 12-30-2012

Below is the manufacturers link to the unit specs. more information visit the Bosch Website at:

on 08-05-2013
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