Diffusers

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Diffusers

Our stainless steel diffusers provide a perfect air and fuel mixture for optimal combustion.

*These Diffusers are compatible with Cleaver-Brooks boilers.

Part # | Diameter | Model | HP Range

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  • 275-031
    36 inch
    CB
    15-20 HP
  • 275-032
    36 inch
    CB
    30-40 HP
  • 275-128
    100 Series
    36 inch
    CBH
    25-50A HP
  • 275-065
    O/S
    48 inch
    CB
    50 HP
  • 275-066
    O/S
    48 inch
    CB
    60 HP
  • 275-067
    O/S
    48 inch
    CB
    70 HP
  • 275-068
    O/S
    48 inch
    CB
    80 HP
  • 275-069
    O/S
    48 inch
    CB
    100 HP
  • 275-127
    200/700 Series
    48 inch
    CBH
    80-100 HP
  • 275-185
    N/S
    48 inch
    CB
    100 HP, 100A-125A
  • 275-186
    N/S
    48 inch
    CB
    50-60 HP
  • 275-187
    N/S
    48 inch
    CB
    70-80 HP
  • 275-950
    55 inch
    CBEX-E
    100-125 HP
    30 PPM
  • 275-063
    60 inch
    CB, CBW
    125-150 HP, 100 HP
  • 275-082
    60 inch
    CB
    200 HP
  • 275-264
    60 inch
    CBLE
    125-200 HP
    30 PPM
  • 275-295
    60 inch
    CBLE
    125-200 HP
    30 PPM
  • 275-312
    60 inch
    CBEX-E
    150-200 HP
  • 275-310
    67 inch
    CBEX-E
    250 HP
    60 PPM
  • 275-108
    78 inch
    CB
    250-300 HP
  • 275-109
    78 inch
    CB
    350 HP
  • 275-253
    78 inch
    CB
    250-300 HP-HTD
  • 275-254
    78 inch
    CB
    350 HP-HTD
  • 275-305
    78 inch
    CBEX-E
    350-400 HP
    30/60 PPM
  • 275-1418
    78 inch
    CBEX-DE
    300-350 HP
    30 PPM
  • 275-303
    85 inch
    CBEX-E
    600 HP
    30/60 PPM
  • 275-2001
    85 inch
    CBEX-E
    500 HP
    30 PPM
  • 275-2715
    85 inch
    CBEX-E
    500 HP
    60 PPM
  • 275-143
    96 inch
    CB
    400-800 HP
  • 275-255
    96 inch
    CB
    500-800 HP-HTD
  • 275-256
    96 inch
    CB
    400 HP-HTD
  • 275-317
    106 inch
    CBEX-E
    900-1000 HP
    30 PPM
  • 275-151
    CN Series
  • 275-205
    BR Series
  • 275-215
    Model 5 4500-6000, 200/700 Series
  • 275-227
    Model 4 4500-6000, 200/700 Series
  • 275-237
    Model 4 1500-2000, 200/700 Series
  • 275-304
    CBEX-2W
    800 HP
    30/60 PPM
  • 275-2002
    CBEX-2W
    600 HP

In-stock items. Order by 3:00 PM EST for Same-Day Shipping.

*Halmar Corporation offers many Cleaver-Brooks aftermarket parts. Halmar Corporation is not a factory authorized sales representative for Cleaver-Brooks, nor is Halmar Corporation affiliated with Cleaver-Brooks in any way. Cleaver-Brooks is a registered trademark of Cleaver-Brooks, Inc., Thomasville, GA.

Some aftermarket parts may be made by other manufacturers.

Order now (502) 459-9131 Get a Quote

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Frequently Asked Questions About Diffusers

A boiler diffuser is a high-temperature combustion component located at the burner head assembly. Its primary function is to mix coming fuel and forced air into a perfect uniform ratio. By creating proper turbulence at the point of ignition, stainless steel diffusers optimize overall combustion efficiency, guarantee flame stability, and eliminate fuel waste.

Because diffusers operate directly within the intense radiant heat of the burner flame zone, they are subject to extreme thermal stress and oxidation over time. During standard seasonal turnarounds or scheduled fireside maintenance inspections, technicians should look for severe metal warping, cracked structural welds, or advanced material erosion along the outer edge fins. Replacing a distorted piece with a fresh aftermarket component stops fuel pooling and improper flame patterns before they damage your furnace lining.

Sourcing proprietary or assembly-specific burner elements directly from original equipment manufacturers (OEMs) often exposes mechanical contractors to lengthy supplier backorders and steep price premiums. Halmar functions as an independent domestic supplier, maintaining a massive, ready-to-ship pool of high-durability aftermarket boiler parts on our warehouse shelves in Louisville, Kentucky. We ensure precise dimensional alignment for seamless machinery compatibility alongside fast same-day shipping on all in-stock products.

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Spider DiffusersE028-143 Diffuser