Dunkirk D248A400A40 Dunkirk D248-400S Commercial Steam Boiler w/ CSD-1 Gravity Return, Natural Gas,  310 MBH Out, 233 Net AHRI MBH (D248A400A40)

Dunkirk D248-400S Commercial Steam Boiler w/ CSD-1 Gravity Return, Natural Gas, 310 MBH Out, 233 Net AHRI MBH (D248A400A40)

SKU: 388808
$ 4,757.95 / ea
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Dunkirk D248-400S Commercial Steam Boiler W/ CSD-1 Gravity Return, Natural Gas, 310 Mbh Out, 233 Net Ahri Mbh (D248A400A40)

SKU: 388808
$4,757.95/ea


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About the Dunkirk D248A400A40

Expect a stress-free installation process with this commercial boiler!


The Dunkirk D248-400S commercial steam boiler with CSD-1 gravity return simplifies installations with pre-assembly, a Plug 'N Play harness for easy setup, and color-coded wiring to prevent errors. It also offers the option for CSD1 compliance, ensuring efficient, error-free, and code-compliant installations. This boiler is built from heavy-gauge steel with an enamel paint finish, and is fully insulated with fiberglass to maintain low surface temperatures. Its cabinet features supply and return connections on both sides, and the burner access panel is designed for easy removal during servicing. Additionally, it operates with a natural gas fuel.


This commercial boiler offers a choice of 28 different sizes, catering to the heating requirements of various establishments such as schools, churches, office buildings, factories, and more. Its heating inputs range from 300 MBH (87.99 kW) to 3000 MBH (879.89 kW). Additionally, it comes with a ten (10) year limited warranty for the individual sections. Also, it meets ASME standards and holds CSA certification in the US, alongside I=B=R ratings approved by GAMA. Notably, the City of New York has granted it Equipment Acceptance number MEA 205-89-E.


Dunkirk presents reliable products that inspire confidence, backed by a united team of skilled individuals committed to delivering quality and dependability to customers. Get your Dunkirk D248-400S commercial steam boiler with CSD-1 gravity return today and browse through a collection of heating, ventilation, and air conditioning (HVAC) supplies such as boilers and return air grilles. Feel free to check out these products anytime, here at PlumbersStock!

Manufacturer: Dunkirk
Product: Boiler
Color: Blue
Modus Operandi: Natural Gas
Style: Commercial
Mount Type: Floor Mount
Type: Steam type
Electrical Voltage: 120 Volt
Vent Size: 10"
Mpn # D248A400A40
Weight 1,143.00 lbs.
  • D248A400A40
  • Cast Iron
  • Commercial Grade
  • Output of 310
  • Steam PPF of 1.33
  • Steam BTU 233

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