3500 Wood Fireplace Insert by Osburn
3500 Wood Insert
Upgrade your existing wood burning fireplace with the Osburn 3500 insert. This large wood-burning fireplace insert offers up to 110,000 BTUs, 77% optimum efficiency and low average particular emissions of 1.6 g/h. The generous 3.5 cubic foot firebox features a strategically placed high-power 144 CFM, heat-activated blower for distributing heat into the room. Designed to work with a faceplate available in two sizes or an optional faceplate that may be customized, the 3500 insert also comes with your choice of black or brushed nickel door overlay and faceplate trims.
- Door overlay and faceplate trims available in black or brushed nickel
- Three faceplate options: 44″ x 32″, 50″ x 32″, and customizable 50″ x 32″
- 3.5 cubic foot firebox
- Up to 110,000 BTUs
- Outside air intake
- Premium 144 CFM blower included
- Meets EPA 2020 requirements with emissions as low as 1.6 g/hr
Photo 1: Osburn 3500 wood insert shown with black door overlay, black faceplate trim, and 44″ W x 32″ H faceplate
Photo 2: Osburn 3500 wood insert shown with brushed nickel door overlay, black faceplate trim, and 44″ W x 32″ H faceplate
Photo 3: Osburn 3500 wood insert shown with black door overlay, brushed nickel faceplate trim, and 44″ W x 32″ H faceplate
Photo 4: Osburn 3500 wood insert shown with brushed nickel door overlay, brushed nickel faceplate trim, and 44″ W x 32″ H faceplate
Photo 5: Osburn 3500 wood insert shown with black door overlay, black faceplate trim, and 50″ W x 32″ H faceplate
Photo 6: Osburn 3500 wood insert shown with brushed nickel door overlay, black faceplate trim, and 50″ W x 32″ H faceplate
Photo 7: Osburn 3500 wood insert shown with black door overlay, brushed nickel faceplate trim, and 50″ W x 32″ H faceplate
Photo 8: Osburn 3500 wood insert shown with brushed nickel door overlay, brushed nickel faceplate trim, and 50″ W x 32″ H faceplate
Osburn 3500 Wood Insert Components and Options
Required Components and Options for the 3500 Wood Burning Insert
Door Overlay (choose one):
Black door overlay
Brushed nickel door overlay
Faceplate (choose one):
Faceplate kit 44″ x 32″
Large faceplate kit 50″ x 32″
50″ W x 32″ H cuttable faceplate
Faceplate Trim (choose one):
Black faceplate trims 44″ x 32″ or 50″ x 32″
Brushed nickel faceplate trims 44″ x 32″ or 50″ x 32″
Additional Options for the 3500 Insert
Rigid firescreen
5ӯ fresh air intake kit oval
5″Ø fresh air intake register with airtight damper
Offset liner adaptor
Flex liner kits
Osburn 3500 Wood Burning Insert OB03510 Specifications
3500 Wood Insert – OB03510
| Overall Appliance Width: | 30-3/8″ |
| Overall Appliance Height: | 24-7/8″ |
| Overall Appliance Depth: | 29″ |
| Minimum Fireplace Opening Width: | 31″ |
| Minimum Fireplace Opening Height: | 26-1/4″ |
| Minimum Fireplace Opening Depth: | 18-3/8″ |
| Viewing Area: | 18-7/8″ x 11-3/4″ |
| Recommended Heating Area*: | 1,000 – 2,700 sq. ft. |
| Maximum Burn Time*: | 10 hours |
| Maximum Log Length: | 22″ Over Width & Over Depth |
*Recommended heating area and maximum burn time may vary subject to location in home, chimney draft,heat loss factors, climate, fuel type and other variables. The recommended heated area for a given appliance is defined by the manufacturer as its capacity to maintain a minimum acceptable temperature in the designated area in case of a power failure.
Front view
Top view
Side view
Side view with faceplate extension
