Woodstock Absolute Steel Hybrid 211 wood stove

Woodstock Soapstone rates the Absolute Steel Hybrid 211 for Up to 1,800 sq ft with an output of 48,000 BTU/h (top of the EPA-tested output range). The firebox holds 2.45 cubic feet, #9 by size of the 20 stoves listed here, and particulate emissions are 0.5 g/h, 25% of the EPA's 2 g/h limit.

1Heating area Up to 1,800 sq ft
2Output 48,000 BTU/h
3Firebox 2.45 cu ft
4Particulate 0.5 g/h

Specification	Woodstock Absolute Steel Hybrid 211
Heating area	Up to 1,800 sq ft
Output	48,000 BTU/h (top of the EPA-tested output range); low 10,000 BTU/h
Efficiency	77% HHV (2020 EPA efficiency, HHV)
Particulate emissions	0.5 g/h
Firebox	2.45 cu ft
Log length	up to 20 in
Flue	6 in
Weight	490 lb (standard-height model)
Burn time	10 to 14 hours

Published output of the Woodstock Absolute Steel Hybrid 211 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 Absolute Steel Hybrid 211 heats

On this site's floor-area pages the Absolute Steel Hybrid 211 appears for the up to 1,200 sq ft and 1,200 to 2,000 sq ft bands. At its top rating of 1,800 sq ft, a 1970s house in Oregon needs about 27,044 BTU/h on a 0°F night, below the stove's 48,000 BTU/h. The same floor area built before 1950 in North Dakota needs about 34,604 BTU/h, which the published output still covers.

Floor area	1970s house, Oregon	Pre-1950, North Dakota	Within 48,000 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	Median state only

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. The Absolute Steel Hybrid 211 runs from 10,000 to 48,000 BTU/h, a 4.8-to-1 range, which helps in mild weather when a big stove would otherwise be turned down and smoulder.

Wood it burns in a winter

With its published 77% efficiency, heating 1,800 sq ft (built in the 1970s) on generic 20 million Btu cords takes about 3.4 cords in Oregon and 6.0 cords in North Dakota. It takes logs up to 20 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 10 to 14 hours 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 0.5 g/h the Absolute Steel Hybrid 211 is 25% of the EPA's May 15, 2020 limit of 2 g/h and 20% of the 2.5 g/h limit for stoves certified on cord wood. It is a catalytic design. The EPA rules guide explains the limits.

Similar stoves

Woodstock Progress Hybrid 209: 47,220 BTU/h, Up to 2,200 sq ft
Woodstock Fireview 205: 46,460 BTU/h, 900–1,600 sq ft
Woodstock Keystone 204: 46,437 BTU/h, 800–1,300 sq ft
Drolet Fox: 45,000 BTU/h, 250–1,200 sq ft

Source: Woodstock Soapstone Co., Absolute Steel Hybrid wood stove page, checked 2026-10-20. Ratings are the maker's own; installation clearances and permits follow the installation manual and local code. See the methodology.