Maker's page: ready for shipping starting 2026-10-28 · checked 2026-10-21

Osburn 950 N wood stove

Osburn rates the 950 N for 250–1,200 sq ft with an output of 75,000 BTU/h (maximum heat output, dry cordwood). The firebox holds 1.85 cubic feet, #16 by size of the 22 stoves listed here, and particulate emissions are 1.7 g/h, 85% of the EPA's 2 g/h limit.

1Heating area 250–1,200 sq ft
2Output 75,000 BTU/h
3Firebox 1.85 cu ft
4Particulate 1.7 g/h

Specification	Osburn 950 N
Heating area	250–1,200 sq ft
Output	75,000 BTU/h (maximum heat output, dry cordwood)
Efficiency	74% HHV (average overall efficiency; LHV listed as N/A)
Particulate emissions	1.7 g/h
Firebox	1.85 cu ft (1.67 cu ft EPA loading volume)
Log length	up to 17 in
Flue	6 in
Weight	316 lb (shipping weight)
Burn time	up to 5 hours (maximum burn time)

Published output of the Osburn 950 N and the four listed stoves closest to it. Makers define the figure differently (maximum, top of the EPA test range, or constant output on High); each stove's page says which. Bars to scale from zero.

What the 950 N heats

On this site's floor-area pages the 950 N appears for the up to 1,200 sq ft and 1,200 to 2,000 sq ft bands. At its top rating of 1,200 sq ft, a 1970s house in Oregon needs about 18,029 BTU/h on a 0°F night, below the stove's 75,000 BTU/h. The same floor area built before 1950 in North Dakota needs about 23,069 BTU/h, which the published output still covers.

Floor area	1970s house, Oregon	Pre-1950, North Dakota	Within 75,000 BTU/h?
1,000 sq ft	15,024	19,224	Both
1,500 sq ft	22,537	28,836	Both
2,000 sq ft	30,049	38,448	Both
2,500 sq ft	37,561	48,061	Both

These are estimates from average use, not a heat-loss calculation of a real house, and a stove heats the room it stands in first.

Wood it burns in a winter

With its published 74% efficiency, heating 1,200 sq ft (built in the 1970s) on generic 20 million Btu cords takes about 2.4 cords in Oregon and 4.1 cords in North Dakota. It takes logs up to 17 in, so standard 16-inch face-cord wood fits; University of Maryland Extension suggests cutting wood about 3 inches shorter than the firebox. The maker quotes up to 5 hours (maximum burn time) per load.

The species that burn best in any stove are the dense hardwoods Utah State rates excellent overall: osage-orange (30.5), black locust (28.3), white oak (27.9), apple (27), bur oak (26.3) million Btu per cord. Burn them dry; see how to season firewood.

Emissions and EPA rules

At 1.7 g/h the 950 N is 85% of the EPA's May 15, 2020 limit of 2 g/h and 68% of the 2.5 g/h limit for stoves certified on cord wood. It burns without a catalyst. The EPA rules guide explains the limits.

Similar stoves

Osburn 2000: 75,000 BTU/h, 500–2,100 sq ft
Pacific Energy Super LE: 72,000 BTU/h, Up to 2,000 sq ft
Osburn 1700: 65,000 BTU/h, 500–1,800 sq ft
Pacific Energy Neo 2.5 LE: 85,000 BTU/h, No area published

Source: Osburn, 950 N Wood Stove (OB00951) product page, checked 2026-10-21. Ratings are the maker's own; installation clearances and permits follow the installation manual and local code. See the methodology.