The Osburn 1900 must be installed in a masonry fireplace. Compact yet elegant, the Matrix 1900 combines refined design with practical performance. Its cast-iron faceplate features decorative columns and a patterned louver, while a large ceramic glass door offers a panoramic view of the fire. With tapered sides for easy installation in smaller hearths, a deep firebox to reduce cleaning, and a quiet 90 CFM blower, this unit is ideal for efficient, cozy heating in tighter spaces.

Key Specs:

• Heating area: 250 – 1,200 ft²
• Firebox volume: 1.1 ft³ (1.03 ft³ EPA tested)
• Max burn time: 7 hours
• Max heat output: 45,000 BTU/h
• Efficiency: 75% (HHV), up to 82% optimal
• Emissions: 1.5 g/h
• Max log length: 17" (loading over width)
• Chimney: 6" diameter, 12' minimum height
• Blower: 90 CFM (included)
• Glass dimensions: 18" × 8 ⅛"
• Dimensions (W × H × D): 36" × 23 ⅞" × 21"
• Firebox (W × H × D): 16 ¾" × 8 ⅞" × 12 ⅜"
• Fireplace opening (min): 25" W × 19" H × 15 ½" D
• Lining: Molded refractory bricks, stainless-steel secondary-air system
• Door: Single, cast iron with ceramic glass
• Warranty: Limited lifetime