Introducing the new E50C Combi Boiler.


Specifically designed for multifamily applications with up to 1.5 baths, the new E50C condensing boiler delivers all the home heating and water heating customers need, while keeping installation and operation costs down and efficiency at its highest.

Benefits at a Glance:

  • Most efficient condensing combi boiler on the market–95.6% AFUE
  • Cost-effective, simplified installation–fewer components needed
  • No primary secondary piping or closely spaced tees required*
  • No system pumps required–reduces install time and cost
  • Fewer maintenance intervals required than the competition– Inspection every two years or 4,000 hours; Service every four years or 8,000 hours
  • 13,600 to 50,000 BTU heating load
  • Proprietary stainless steel heat exchanger for unmatched performance and durability
  • Greater control–system temperature adjustable in two-degree increments
  • Automatic de-aeration at start-up

*Not required if the pressure drop in any system loop(s) does not exceed 4.6 feet of head at 4.5 GPM flow rate.

Standard Hookups and Installation

e50c interior illustration

Sales & Marketing Information

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Technical Information

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Rinnai utilizes a network of Manufacturer’s Representatives that can assist you with questions regarding the E50C Combi Boiler. View our rep directory to find out who to contact in your area.

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