Superior WXS2021 Freestanding Wood Stove with Cast Door
The Superior WXS2021 is a freestanding wood stove with a heavy-gauge steel body on a black pedestal base and a 2.1 cu ft firebrick-lined firebox for 20" logs.
It puts out up to 76,000 Btu an hour, burns up to 7 to 9 hours on a low setting, and is EPA certified to the 2020 standard and approved in Washington State.
The Superior WXS2021: A Freestanding Stove for Real Wood Heat
The WXS2021WSS is the larger of Superior's two WXS2000 freestanding wood stoves: a heavy-gauge steel stove on a black pedestal base with a 2.1 cu ft firebrick-lined firebox that takes logs up to 20" and puts out up to 76,000 Btu an hour, enough for up to about 2,000 sq ft. A large rectangular black cast-iron door with 18-3/4" x 9" of ceramic glass shows the fire, and an air wash keeps the glass clear.
It is a non-catalytic, EPA-certified stove that meets the 2020 emission standard and is approved in Washington State. A single air control on the left side runs it from a hot fire down to a slow burn of up to 7 to 9 hours on a load of wood. It vents through a 6" flue collar on top into a listed 6" Class A chimney or a lined masonry chimney, and Superior approves it for manufactured (mobile) homes in the US with an outside air kit.
The optional 150 CFM blower with Dial-A-Temp speed control (BLWR-T-S150-B) pushes warm air into the room, and the outside air kit brings combustion air in from outdoors. For a smaller stove with a steel door, see the WXS2016WS.
Compare it with our other wood stoves, or see all our EPA-approved wood stoves.
Features
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Firebox: freestanding wood stove with a 2.1 cu ft firebox for logs up to 20".
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Heat output: up to 76,000 Btu an hour; heats up to 2,000 sq ft.
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Clean burning: EPA certified to the 2020 emission standard, non-catalytic, and approved in Washington State.
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Door: large rectangular black cast-iron door with ceramic glass.
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Air wash: keeps the glass clean.
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Firebrick: high-density firebrick lining that holds heat.
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Air control: one lever for easy operation.
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Long burns: up to 7 to 9 hours on a low setting.
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Build: heavy-gauge, precision-cut steel body with a black pedestal base.
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Flue: 6" flue collar on top.
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Blower option: optional 150 CFM blower with Dial-A-Temp speed control.
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Manufactured homes: approved for manufactured (mobile) homes in the US, with the outside air kit.
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20 year limited warranty: covers the stove body and firebox.
What's Included
- Stove with a black pedestal base and black cast-iron door with ceramic glass
- Firebrick (23 pieces), baffle boards and baffle blanket, set in place during installation
- Air wash system and 6" flue collar
- Installation and operation manual
What to Order With It
Required – Venting, ordered separately:
- 6" chimney connector (stove pipe): 24 MSG black steel single-wall pipe, or double-wall pipe (required in a mobile home)
- A listed 6" Class A chimney (UL 103HT in the US, ULC-S629 in Canada) from Security, Jakes Evans/GSW, DuraVent, Metal Fab, Ameri-Tec, Metalbestos, Industrial Chimney or IHP Snap-Pak, or a code-approved masonry chimney with a flue liner
- Floor protector: non-combustible, at least 3/8" thick, sized as listed under Installation Requirements
Optional – Blower:
Optional – Outside air (all three parts; required in a manufactured home):
Optional:
Specifications
| Model |
WXS2021WSS |
| Superior item number |
F5071 |
| Type |
Freestanding wood-burning stove, non-catalytic, EPA certified (2020 standard), Washington State approved |
| Fuel |
Dry, seasoned wood only |
| Maximum heat output |
76,000 Btu/h |
| EPA test range |
11,600 to 35,000 Btu/h |
| Efficiency |
72.9% HHV, 78.8% LHV (low burn rate, CSA B415.1) |
| Heating area |
Up to 2,000 sq ft (Superior's estimate; the house, the wood and how it's burned all change it) |
| Burn time |
Up to 7 to 9 hours (Superior's estimate) |
| Firebox |
2.1 cu ft, firebrick lined |
| Log length |
Up to 20" |
| Door |
Black cast-iron door with ceramic glass |
| Glass viewing area |
18-3/4" x 9" |
| Flue collar |
6", on top |
| Outside size |
25-7/8" W x 30-3/8" H x 23-3/8" D (26-1/4" deep with the optional blower) |
| Blower |
Optional, 150 CFM, with Dial-A-Temp speed control (BLWR-T-S150-B); 120 V, 60 Hz, 1 A, plugs into a grounded outlet |
| Outside air |
Optional (required in a manufactured home): UZIAD, UZI and OAPCK |
| Manufactured homes |
Approved in the US, with double-wall connector pipe and the outside air kit; never in a sleeping room |
| Listing |
UL 1482-2022 / CAN/ULC-S627:2023 and HUD, listed by PFS TECO (report 14-193) |
| Warranty |
20 year limited (see Warranty below) |
Superior designs its stoves as supplemental heat, so keep another heat source in the house. Heat output, heating area and burn time vary with the house, the chimney, the wood and how the stove is run.
Dimensions and Clearances
Stove dimensions
| Width |
25-7/8" |
| Height, to the top of the flue collar |
30-3/8" |
| Depth |
23-3/8" |
| Depth with the optional blower |
26-1/4" |
| Glass viewing area |
18-3/4" x 9" |
| Flue collar center, from the back of the stove |
5-3/4" |
| Pedestal base footprint |
21" wide x 20" deep |
Clearances to combustibles, US
| Back wall to the flue collar |
Single-wall pipe 14-1/4"; double-wall pipe 12" |
| Back wall to the stove body (reference) |
Single-wall pipe 11-1/2"; double-wall pipe 9-1/8" |
| Side wall to the flue collar |
Single-wall pipe 23"; double-wall pipe 19-1/2" |
| Side wall to the stove body (reference) |
Single-wall pipe 13-3/8"; double-wall pipe 9-5/8" |
| Corner walls to the flue collar |
Single-wall pipe 18"; double-wall pipe 15" |
| Corner walls to the stove body (reference) |
Single-wall pipe 9"; double-wall pipe 6" |
| Floor protector, at least |
34-7/8" wide x 37-5/8" deep; 16" in front of the door opening and 8" to each side of it |
Clearances to combustibles, Canada
| Back wall to the flue collar |
Single-wall pipe 14-1/4"; double-wall pipe 12" |
| Side wall to the flue collar |
Single-wall pipe 23"; double-wall pipe 19-1/2" |
| Corner walls to the flue collar |
Single-wall pipe 18"; double-wall pipe 15" |
| Floor protector, at least |
40-7/8" wide x 47-5/8" deep; 450 mm (18") in front of the door opening and 200 mm (8") to the sides and back of the stove |
Measure clearances from the 6" flue collar; the stove-body numbers are only for planning. Clearances can only be reduced by means the local code official approves.
Installation Requirements
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Floor protection: the floor under and in front of the stove needs a non-combustible floor protector at least 3/8" thick, reaching 16" in front of the door opening and 8" to either side of it in the US (450 mm in front and 200 mm to the sides and back in Canada). Where the connector pipe runs horizontally over the floor, protect the floor under it and 2" to each side.
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Chimney connector: 6" pipe, all of one brand, fastened to the flue collar and at every joint with three sheet metal screws. It can't pass through an attic, closet, floor or ceiling; through a combustible wall, use one of the NFPA 211 pass-through systems shown in the manual (CSA B365 in Canada). Horizontal runs stay short and rise at least 1/4" per foot.
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Chimney: a listed 6" Class A chimney rated to 2,100°F (UL 103HT in the US, ULC-S629 in Canada) from the brands Superior lists, or a code-approved masonry chimney with a flue liner and at least 48 sq in of flue area. It can't serve any other appliance. The stove needs about 12 feet of effective draw: each 90° of direction change costs about 5 feet, and there can't be an offset within the first 2 feet above the flue collar. The chimney has to rise 3 feet above where it leaves the roof and 2 feet above anything within 10 feet. Draft should read between 0.04" and 0.08" water column.
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Combustion air: the stove can't run in negative pressure. In a tight house, or one with large kitchen exhaust fans or other equipment that pulls air out, provide make-up air; the outside air kit brings air to the stove itself. Its intake can be no more than 10 feet above the base of the stove and has to draw from outdoors, never from an attic, basement or garage.
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Manufactured (mobile) homes: approved in the US when installed to 24 CFR Part 3280, with double-wall connector pipe, the full outside air kit, the stove bolted to the floor in two places and grounded to the steel chassis with #8 copper wire, and a chimney cap with a spark arrestor. Never in a sleeping room, and keep the structure of the floor, walls and roof intact.
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Alcove: Superior says not to install the WXS2021 in an alcove.
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Firebrick and baffle: the firebrick and the baffle boards and blanket go in during installation, in the order the manual shows; the blanket has to lie flat so it doesn't block the flue.
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Blower: the optional blower plugs into a grounded 120 V outlet through its Dial-A-Temp control. Don't run the cord under or in front of the stove. If the blower is ever removed, put the rear heat shield back before burning the stove.
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Codes and inspection: install to NFPA 211 in the US or CSA B365 in Canada and your local codes, and have the chimney and connector inspected by your building official or fire marshal before the first fire. Superior recommends a smoke detector, ideally in a hallway next to the room, and a carbon monoxide monitor.
Bring the Superior WXS2021 Home with Dreamwood Living
The WXS2021 suits a cabin, den or main living area that needs dependable wood heat. Reach out to our team for help with the chimney, floor protection and clearances.
FAQs
How do I run the air control?
The wood-handled lever on the left side of the stove sets the air: all the way up is fully open, and lowering it slows the burn. Always push it fully open before you open the door, so the hot gases inside don't flash. Start with paper and kindling at the front of the firebox and the air wide open; once the fire is going, add larger wood, let it burn hot for a few minutes, then turn the air down. A stove thermometer on top helps: if it reaches 600°F, close the air all the way down. For long low burns, try closing the air with the stove at about 325°F and adjust from there in 25° steps.
How do I break in a new stove?
The high-temperature paint cures over three fires: two 20-minute fires at about 250°F, letting the stove cool completely between them, and a third at 450°F or more for 45 to 60 minutes. During these, don't latch the door tightly, open it every 5 to 10 minutes so the gasket doesn't stick to the paint, and keep the house well ventilated, since the paint smokes and smells while it cures. Don't build a big fire until it's done. It can take one to three weeks of fires for the steel and brick to fully season.
What does it need for a chimney?
A 6" chimney connector from the flue collar to a listed 6" Class A chimney (UL 103HT, rated to 2,100°F) or a lined masonry chimney, all ordered separately. Single-wall black steel stove pipe is fine in a house; a manufactured home needs double-wall connector pipe. The chimney has to give about 12 feet of effective draw and rise 3 feet above the roof and 2 feet above anything within 10 feet.
Does it need the blower?
No, it's optional. The 150 CFM blower with Dial-A-Temp speed control (BLWR-T-S150-B) moves more warm air into the room; turn it off before you open the door to load wood.
Can it go in a mobile home?
Yes, in the US, when it's installed to the manufactured home standard: double-wall connector pipe, the UZIAD, UZI and OAPCK outside air parts, the stove bolted to the floor and grounded to the chassis, a spark arrestor on the chimney cap, and never in a sleeping room.
What should I burn?
Only dry, seasoned natural wood below 20% moisture; a firewood moisture meter helps. Softwoods need 6 to 18 months of seasoning and hardwoods 12 to 24, stacked off the ground under cover where air can move. Build the fire right on the firebrick, never on a grate or andirons, and don't force oversized logs in, since they can knock the baffle out of place. Never burn trash, treated wood, plywood, driftwood or anything that's been in salt water, coal or charcoal, and never use gasoline, kerosene or lighter fluid. Fire starters made of paper, sawdust or wax are fine.
What upkeep does it need?
Check the chimney connector and chimney at least once a month during the heating season and have them cleaned once creosote reaches 1/8". Have the stove inspected once a year by a qualified technician, check the door gasket and baffle boards, and lubricate the hinges with anti-seize, never oil. Empty ashes when they reach 3 to 4" deep, leaving about 1", into a steel can with a tight lid that goes straight outdoors; ashes can reignite up to 72 hours later.
How do I keep the glass clean?
Burn dry wood, keep fresh logs back from the glass, and let a new load catch before turning the air down; a short, hot fire clears light haze. Clean the glass only when the stove is cold, with a cleaner made for stove glass, never abrasives, steel wool, oven cleaner or a razor blade. Replace cracked glass only with Superior's 5 mm ceramic glass.
Documents & Downloads
Warranty
Superior's 20 Year Limited Warranty covers the WXS2021WSS against defects in materials and workmanship:
- Stove body and firebox: 20 years
- Ceramic glass: 20 years, against thermal breakage only
- Removable air tubes: 5 years, repair or replacement
- Firebrick and other refractory: 2 years (hairline cracks excluded)
- Cast iron parts, gaskets and electrical parts such as the optional blower: 1 year
- Parts not listed: 90 days
- Labor: paid at IHP rates for up to one year
Vent components, trim and paint are not covered, and neither is damage from overfiring or from burning driftwood, coal, plywood or anything other than dry, seasoned wood. Coverage also depends on building the fire directly on the firebrick, without a grate or andirons. The warranty is for the original owner of a stove installed in the US. Full terms are in the installation manual.
