Osburn 3500 Wood Insert
Best high-capacity insert for heating large homes during harsh winters.
This is the heavy-duty workhorse for those who need to heat a sprawling home through the harshest winters. It prioritizes raw, long-burning capacity over compact aesthetics, turning your fireplace into a legitimate, high-efficiency furnace that demands less frequent refueling.
$3819.00
at
Maine Wood Heat Co. Inc.
Who it's for
- Homeowners heating large, open-concept living spaces
- Eco-conscious users prioritizing efficiency and reduced fuel consumption
- Busy individuals wanting long burn times and fewer reloads
Who should skip it
- Owners of standard or smaller masonry fireplace openings
- Budget-focused shoppers seeking an entry-level heating solution
- Quiet-seeking users sensitive to mechanical fan noise
Performance breakdown
Heating Capacity
Easily handles large floor plans up to 2,700 square feet.
Burn Efficiency
Non-catalytic technology delivers impressive heat output with minimal fuel waste.
Burn Duration
Ten-hour burn times keep your home warm through the night.
Build Robustness
Heavy-duty cast iron construction ensures long-term durability and heat retention.
Maintenance Ease
Integrated air-wash system keeps the viewing glass clear with minimal effort.
Heat Distribution
Powerful blower system effectively circulates warmth throughout the entire living space.
Key Specs
Fuel Type
Wood
Overall Dimensions
24-7/8"H x 30-3/8"W x 29"D
Heating Area
1000-2700 sq. ft.
Firebox Volume
3.5 cu. ft.
Max Burn Time
10 hours
Max Heat Output
110,000 BTU/h
Optimum Efficiency
77%
Flue Outlet Diameter
6 inches
Fuel type
Dry cordwood
Maximum log length
22 inches
Know before you buy
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