Fireplaces / Wood Burning / Large Inserts

Osburn Large Inserts

Osburn • Wood Inserts

Large Inserts

High-capacity choices for larger fireplaces and bigger heating areas. We will help compare the current models, confirm the right size, and coordinate the chimney, clearances, hearth, and surrounding finish.

Large capacityTraditional & modern
Current family3500-I and Matrix 2700
Best fitHigh-capacity choices for larger fireplaces and bigger heating areas.
Chimney planningVenting, clearances, and outside-air needs
Local supportSelection, installation, and service

Buying guidance

Why choose Large Inserts?

High-capacity choices for larger fireplaces and bigger heating areas. Use the short sections below to see where it fits, what separates it, and what should be settled before ordering.

Best forTurning a masonry fireplace into a serious heater

High-capacity choices for larger fireplaces and bigger heating areas.

What makes it different2 configurations within one family

The current collection includes 3500-I: Current model; Matrix 2700: Current model. Part of the Large Inserts family.

What to plan forInspect the chimney and measure the masonry opening

Confirm the exact appliance, chimney route, clearances, outside-air needs, floor protection, and surrounding finish before construction. The current choices shown here include Current model, Current model.

Compare nearby wood choices 3 alternatives

2000 Insert Family

One proven firebox offered in traditional, minimalist, and contemporary presentations.

Compare 2000 Insert Family

Traditional Inserts

Three capacities with clean traditional styling, from smaller rooms through large spaces.

Compare Traditional Inserts

Current collection

Models and sizes

3500-I

Current model

Part of the Large Inserts family. We will confirm opening, heat needs, chimney requirements, and available finishes.

Matrix 2700

Current model

Part of the Large Inserts family. We will confirm opening, heat needs, chimney requirements, and available finishes.

From the Gagnon website

Project photos and design examples

These Gagnon website images help show room scale and finish possibilities. Some may feature earlier versions in the same family, so current specifications and options should be confirmed before ordering.

Gagnon project example
Gagnon project example

Before ordering

Plan the complete wood-burning system

Match the appliance to the room

We will compare firebox size, heating goals, burn style, loading, and the space available for the appliance.

Confirm chimney and clearances

Chimney height and routing, floor protection, mantel clearances, and outside-air requirements must be coordinated early.

Choose the finished appearance

Compare doors, surrounds, pedestal or leg choices, hearth materials, and surrounding brick or stone as one design.

Details and support

Resources

Official Large Inserts information

Use the manufacturer page for current manuals, detailed specifications, emissions data, and configuration resources.

Open official technical resources

Get help from Gagnon

We can narrow the choices, verify the installation plan, and provide current product and installation pricing.

Contact a fireplace specialist

Let’s plan the right wood-burning product

Send us your opening dimensions or room plans, or visit the showroom to compare the choices in person.

Ask Gagnon