Midwest Hearth Catalytic Combustor Appalachian (2.5" x 5.56" x 3" w/ Notch)

Catalytic Combustor Appalachian (2.5" x 5.56" x 3" w/ Notch)

Midwest Hearth
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Midwest Hearth MH-18N replacement combustors are a high-quality choice for your Appalachian catalytic wood burning stove.
Replacing your old combustor will help you improve your stove's efficiency, saving you money and producing less pollution.

Catalytic Combustor FAQ

Catalytic Combustor Warranty


  • 25 Cell Un-canned Combustor
  • THESE ARE SOLD AS "EACH". Your stove may require 2 for operation.


  • Square/Rectangular: 2.5" x 5.56" x 3" w/ Notch

Compatible Stove Models:


  • 4N1-XL (After 1989)
  • 4N1-XL II Trailmaster

Comparable to ACI FireCat part number ACI-18N

OEM Part # 1810-0CAT3

    California residents see
    Prop 65 WARNINGS


    This product may expose you to chemicals including aluminosilicate, a chemical known to the State of California to cause cancer. For more information go to www.p65Warnings.ca.gov