Firebox Liner

Firebox Liner (40366) – Compatible with Ashley & Jensen Wood FurnacesMaintain the structural integrity and heat performance of your furnace with this high-quality replacement firebox liner (40366). Engineered for both front and rear placement, this OEM-equivalent liner withstands extreme furnace temperatures while helping to extend the life of your unit. Sold individually—most furnaces require two liners per installation.Key Features:Dual-Use Design – Functions as both front and rear liner for compatible furnacesHigh-Temperature Durability – Withstands extreme heat for long-term performanceOEM Replacement – Matches US Stove part 40366 and replaces 410-3003Precision Fit – Pre-drilled mounting holes 12″ on center for straightforward installationSpecifications:Part Numbers: 40366 (also replaces 410-3003)Dimensions: 15-1/4″ wide (tapers to 6-1/8″) x 5-1/2″ tallMounting Hole Spacing: 12″ on centerMaterial: High-temperature refractorySold: Individually (2 required per furnace)Compatible Models:Ashley Furnaces: 24A, 30AJensen Furnaces: 24AF, 24AG, 24AZ, 24AJ, 24AC, 30ACNote: Always verify compatibility with your owner’s manual before ordering.Pairs well with: Ashley Stove Parts andUS Stove Company PartsWhy Choose the 40366 Firebox Liner?Replacing worn or cracked liners is essential for maintaining safe, efficient furnace operation. The 40366 liner is engineered to OEM standards, offering heat resistance, structural stability, and a long service life. Protect your furnace and enjoy reliable heating season after season.