ES2-7, 153,000 BTU Output High Efficiency Cast Iron Boiler (NG) Zoom

ES2-7, 153,000 BTU Output High Efficiency Cast Iron Boiler (NG)


Brand: Burnham

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Fuel Type: Natural Gas
BTU Input: 210000
DOE Rating:
IBR Rating:
System Type: Hydronic (Water)
Capacity (Gallons): 6
Gas Connection: 3/4"
Vent Size: 7"
Features: EI/Spark Ignition
Width (Inches): 24-3/4"
Weight (lbs): 464 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 ES2-7

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 464 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.

ES2-7, 153,000 BTU Output High Efficiency Cast Iron Boiler (NG)


by PowerReviews
BurnhamES2-7, 153,000 BTU Output High Efficiency Cast Iron Boiler

(based on 1 review)

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Reviewed by 1 customer

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(1 of 1 customers found this review helpful)


Homeowner Installer Review - Burnham ES2

By ericrpeterson

from Naperville, IL

Verified Buyer



      Best Uses

        Comments about ES2-7, 153,000 BTU Output High Efficiency Cast Iron Boiler:

        I replaced a 56-year old boiler with this Burnham model, to heat my three-story house. I chose this model because it did not require any venting changes, yet was higher-efficiency than other atmospheric-vented boilers. Also I liked the simple design and the fact that it was cast-iron.
        Good points: simple to hook up to my existing system. I was able to re-use my air separator, pump, compression tank, and zone valves. I like how the high-limit and gas valve are integrated into the boiler. It runs quietly. The LED user interface is easy to use.
        Weak points: partial dis-assembly was needed to move it down the stairs into the basement. The included installation instructions are inadequate; I had to get additional instructions from the Internet. Burham's claims of product suitability are misleading in that they are very vague about the need to protect against low-water return temperatures, and they provide no clear recommendations for when protection is needed, or how best to provide this protection.

        • Primary use:
        • Personal

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        2 Questions | 2 Answers
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        • ES2-7, 153,000 BTU Output High Efficiency Cast Iron Boiler


          Is this boiler a hot water boiler
          Asked on 8/22/2011 by Anonymous

          1 answer

          • CUSTOMER CARE


            Yes, it is.

            Answered on 8/23/2011 by PexSupply Staff from NY
        • ES2-7, 153,000 BTU Output High Efficiency Cast Iron Boiler


          What is the dimension of this unit ?
          Asked on 11/5/2010 by George from MA

          1 answer

          • CUSTOMER CARE


            This boiler is 24-3/4” wide, 41” high, and 33” deep.

            Answered on 11/9/2010 by PexSupply Staff from NY
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