Osburn Matrix 1900 Wood Insert

The Osburn Matrix 1900 Wood Insert (OB01900) transforms an existing masonry fireplace into a practical heating solution. With a maximum output of 45,000 BTU/h, it’s well suited to homes or rooms ranging between 250 and 1,200 square feet. Its design lets you enjoy real wood heat while improving efficiency and reducing wasted energy in traditional fireplaces.

Its cast-iron faceplate frames a large viewing window, offering a clear view of the fire. The flush-mount blower is tucked away to keep the visual clean, while a blower pushes warm air into the room for better heat distribution. The unit is taper-shaped at the top and sides, allowing easier installation in smaller hearths. With up to 7 hours of burn time on properly seasoned wood, it balances convenience and performance for daily use.

Though compact, the Matrix 1900 doesn’t skimp on durability or emissions standards. It uses non-catalytic combustion to reduce emissions, includes molded refractory liners for heat retention and even burn characteristics, and meets EPA 2020 efficiency requirements. If you’re converting your fireplace into an effective heat source, the Matrix 1900 makes a strong option.

Requires the addition of the following accessories to complete the unit

A:

• OA10041  Black Door Overlay

• Non-catalytic combustion, meeting EPA 2020 standards
• Maximum heat output up to 45,000 BTU/h
• Recommended heating area of 250–1,200 ft²
• Large viewing window with glass air-wash to keep clarity
• Flush-mount blower (90 CFM) for better room heat circulation
• Tapered design for easier insertion in tighter hearths
• Refractory liners for internal heat retention and durability
• Up to 7-hour burn time on optimal wood load
• Compatible with 17" log length (16" recommended for best performance)

Osburn Catalog