By Osburn

3500 I wood insert

$3,899.00
$3,899.00
Shipping calculated at checkout.
Faceplate: Regular
Faceplate trim: Black
Door overlay: Black
Availability: In stock
Collections:
OsburnMatrix 2700 wood insert
Matrix 2700 wood insert
Matrix I wood insert
OsburnMatrix I wood insert
$3,899.00
$3,899.00

Enjoy serious heat and style with the Osburn 3500 Wood Insert. This powerhouse, EPA‑2020 certified insert delivers up to 110,000 BTU, efficiently warming 1,000–2,700 sq ft with 77 % efficiency and ultra-low emissions (~1.3–1.6 g/h). Its expansive 3.5 cu ft firebox handles 22″ logs for long burn times (up to 10 hours), and a 144 CFM blower ensures even warmth throughout your home. Clean, sleek, and customizable with door overlays and faceplates, it’s the ideal solution for large spaces—even in harsh winters.

Performance

Fuel: Dry cordwood (16″ recommended)
Heating Area: 1,000–2,700 ft²
Max Heat Output: 110,000 BTU/h
Burn Time: Up to 10 hours
Efficiency: ~77% optimum (71% HHV / 76% LHV)
Firebox Volume: 3.5 ft³
Emissions: ~1.6 g/h

Dimensions

Unit Size (H × W × D): 24 ⅞″ × 30 ⅜″ × 29″
Weight: 540 lb
Chimney: 6″ diameter, minimum 15′ height

Features

Combustion Type: Non-catalytic
Certification: EPA 2020 approved,
Max Log Length: 22″
Glass Door: Ceramic, air-wash system; viewing area 18 ⅞″ × 11 ¾″