ES2-3, 51,000 BTU Output High Efficiency Cast Iron Boiler (NG) Zoom

ES2-3, 51,000 BTU Output High Efficiency Cast Iron Boiler (NG)


Brand: Burnham

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Fuel Type: Natural Gas
BTU Input: 70000
IBR Rating:
DOE Rating:
System Type: Hydronic (Water)
Capacity (Gallons): 2
Gas Connection: 1/2"
Vent Size: 4"
Features: EI/Spark Ignition
Width (Inches): 12-3/4"
Weight (lbs): 254 lbs
Warranty: 1 Year on Boiler Parts/25 Year Limited Heat Exchanger
Vent Type: Atmospheric
Boiler Type: High Efficiency
Water Connection: 1-1/4"
Height (Inches): 41
Depth (Inches): 33"

Description for Burnham ES2-3

Note: Product Title reflects this boiler's IBR Net Output Rating

The Burnham ES2 boiler is the first all new, atmospheric, gas-fired, cast iron boiler for home heating that has been designed in decades. The ES2 Series boasts many innovative features including a proven, long-lasting, American-made cast iron heat engine, the ease and simplicity of atmospheric venting, an exclusive control system that provides features unrivaled by any boiler in the market, an unparalleled 85% efficient ENERGY STARĀ® rating for an atmospheric gas boiler, and an attractive exterior which is equivalent or superior to the design of the most sophisticated condensing boilers.


  • The only 85% AFUE Atmospheric Cast Iron Boiler Available
  • Qualifies for Energy Star Rebates
  • Efficient Operation Saves Homeowners Money
  • Innovative Design, Made in America
  • Ideal Replacement for Millions of Existing Boiler Installations
  • Burnham IQ Control System
  • True Plug & Play Controls Utilizing Burnham IQ Option Cards
  • Auxiliary High Limit
  • Optional LCD Touch Screen Display Sold Separately
  • Altitude up to 10,000 ft

PLEASE NOTE: The product weighs 254 lbs. and may require the use of a
lift gate.
If you do require a lift gate at your delivery, you'll have the option to add this FREE of charge when you checkout.

ES2-3, 51,000 BTU Output High Efficiency Cast Iron Boiler (NG)

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2 Questions | 2 Answers
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  • ES2-3, 51,000 BTU Output High Efficiency Cast Iron Boiler


    Can i use this boiler with 3 zones?
    Asked on 10/11/2012 by PJ from Eastern PA

    1 answer



      Yes, you can.

      Answered on 10/25/2012 by PexSupply Staff from NY
  • ES2-3, 51,000 BTU Output High Efficiency Cast Iron Boiler


    I could still use the chimney for exhaust venting?
    Asked on 8/2/2012 by Darin from New york

    1 answer

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