Osburn Firebrick 29020 Zoom

Osburn Part Firebrick 4 1/2 '' x 9 '' x 1 1/4 '' HD, 2000

29020

Status: In Stock

US$8.22

Description

Description

The Osburn Firebrick, part number 29020, is a high-density replacement refractory firebrick measuring 4-1/2 inches by 9 inches by 1-1/4 inches for use in the Osburn 2000 series wood stove firebox. The firebrick is a refractory component that lines the interior walls and floor of the firebox, protecting the steel firebox body from direct exposure to combustion temperatures and contributing to more even heat distribution throughout the firebox during operation.

The Osburn 2000 wood stove features a firebox lined with refractory bricks as a design element that improves heat distribution and thermal performance during the combustion cycle.

Firebricks in wood stove fireboxes are exposed to sustained high temperatures, rapid thermal cycling between hot and cold states, and mechanical contact during wood loading and ash removal. These conditions cause firebricks to develop cracks, chips, and structural degradation over time that reduce their effectiveness as a protective liner.

Replacement of damaged or deteriorated firebricks restores the firebox lining to its intended configuration and prevents direct heat exposure to the underlying steel firebox body. The 29020 firebrick is an SBI part manufactured to the dimensional specification required for the Osburn 2000 series firebox and is also used across other Osburn, Drolet, Century, and compatible wood stove models that share the same brick dimension.

What's Included: One Osburn high-density refractory firebrick, part number 29020, measuring 4-1/2 inches by 9 inches by 1-1/4 inches for use in the Osburn 2000 series wood stove firebox.

Installation Limits: Firebrick installation and replacement must be performed only when the stove is fully cooled. Damaged firebricks showing cracks extending through the full brick thickness should be replaced before continued operation of the stove. Firebricks must not be cleaned with water while the stove is hot as thermal shock can cause cracking. The stove must never be operated with missing or severely damaged firebrick lining.

Compatibility: Compatible with the Osburn 2000 series wood stove firebox. Also used across other Osburn, Drolet, Century, and compatible wood stove models requiring the 4-1/2-inch by 9-inch by 1-1/4-inch firebrick dimension. Compatibility with specific models should be confirmed against the owner's manual part number listing.

Features

Features

  • High-density replacement refractory firebrick measuring 4-1/2 inches by 9 inches by 1-1/4 inches for the Osburn 2000 series wood stove firebox lining
  • Lines the interior walls and floor of the firebox to protect the steel firebox body from direct combustion temperatures and improve heat distribution during operation
  • High-density construction provides durability and thermal mass suited to the sustained high-temperature and rapid thermal cycling environment of a wood stove firebox
  • Replacement of cracked or deteriorated firebricks restores the firebox lining integrity and prevents direct heat exposure to the underlying firebox steel body
  • SBI OEM part used across Osburn 2000 and other compatible Osburn, Drolet, Century, and compatible wood stove models sharing the same firebrick dimensional specification
  • Firebrick installation and all firebox service must be performed only when the stove is fully cooled and the stove must not be operated with missing or severely damaged firebrick lining

Specifications

Specifications

Part Number: 29020
Brand: Osburn
Manufacturer: Stove Builder International (SBI)
Part Type: High-Density Refractory Firebrick
Brick Length: 9 inches
Brick Width: 4-1/2 inches
Brick Thickness: 1-1/4 inches
Compatible Primary Model: Osburn 2000 Series Wood Stove

 

The Osburn 29020 Firebrick is a high-density replacement refractory firebrick measuring 4-1/2 inches by 9 inches by 1-1/4 inches for the Osburn 2000 series wood stove firebox, restoring firebox lining integrity to protect the steel firebox body and support more even heat distribution during wood combustion.

 

Support

Support

 
Product FAQ

What is the function of firebricks in the Osburn 2000 wood stove firebox?

Firebricks line the interior walls and floor of the Osburn 2000 wood stove firebox and serve two primary functions. They protect the steel firebox body from direct exposure to combustion temperatures that would otherwise cause accelerated degradation of the firebox steel over time. They also contribute thermal mass to the firebox interior, absorbing heat during the combustion cycle and releasing it more evenly, which improves heat distribution within the firebox and supports more consistent combustion performance across the burn cycle.

When should the firebricks in the Osburn 2000 wood stove be replaced?

Firebricks in the Osburn 2000 should be replaced when they develop cracks that extend through the full thickness of the brick, when sections of the brick have broken away and left the underlying firebox steel exposed, or when the brick surface has deteriorated to the point where it no longer provides adequate protection to the firebox body. Surface cracks and minor chips that do not penetrate fully through the brick thickness do not necessarily require immediate replacement, but the firebox lining should be inspected regularly and any brick showing through-cracks replaced before continued operation.

What causes firebricks to crack or deteriorate in a wood stove?

Firebricks in a wood stove firebox are subject to repeated thermal cycling — expanding when the stove is fired and contracting as it cools — which creates internal stress within the brick material over time and eventually leads to cracking. Mechanical impact from wood loading, poking, and ash removal also contributes to surface chipping and brick fracture. Operating the stove at excessively high temperatures and introducing water to hot firebricks, which causes thermal shock, accelerate brick degradation beyond the normal rate associated with regular seasonal use.

Can the Osburn 29020 firebrick be used in wood stove models other than the Osburn 2000?

Yes. The 29020 firebrick at 4-1/2 inches by 9 inches by 1-1/4 inches is an SBI part used across multiple compatible wood stove models from Osburn, Drolet, Century, and other brands that share the same brick dimensional specification. Before using the 29020 brick in a model other than the Osburn 2000, compatibility should be confirmed against the owner's manual parts list for the specific stove model to ensure the 29020 part number is listed as the correct replacement firebrick for that model's firebox lining configuration.

What precautions must be taken when replacing firebricks in the Osburn 2000 wood stove?

All firebrick replacement must be performed only when the stove is fully cooled to ambient temperature. Contact with firebricks or any internal firebox component while the stove retains heat from recent operation poses a severe burn hazard. The stove must not be operated with missing or severely damaged firebrick lining, as unprotected firebox steel exposed to combustion temperatures will accelerate firebox body degradation. Water must never be introduced to hot firebricks during cleaning or any other service activity, as the resulting thermal shock will cause brick cracking.

What is the significance of the high-density designation on the Osburn 29020 firebrick?

The high-density designation indicates that the 29020 firebrick is manufactured from a denser refractory material formulation compared to standard pumice or lightweight refractory bricks. High-density firebricks provide greater thermal mass, absorbing and retaining more heat per unit volume, which supports more even heat distribution within the firebox during the combustion cycle. The higher density construction also generally provides greater resistance to mechanical impact and surface abrasion from wood loading and ash removal compared to lower-density refractory brick alternatives.

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