Is There a Wood Stove That Needs No Chimney?
No wood stove runs without a chimney, but a house without one can still have a wood stove: you add a new Class A chimney, through the roof or through the wall.
A wood stove has to be vented to the outdoors through a chimney, as its listing and the building code require.
Codes are adopted locally, by the state, the county or the town, often with amendments, and your building department confirms which one applies at your address. Where it is the International Residential Code (IRC), the venting rule is Section M1801.1.
Section M1801.1 reads: “Fuel-burning appliances shall be vented to the outdoors in accordance with their listing and label and manufacturer's installation instructions except appliances listed and labeled for unvented use. Venting systems shall consist of approved chimneys or vents, or venting assemblies that are integral parts of labeled appliances. Gas-fired appliances shall be vented in accordance with Chapter 24.”
The heaters the code lets run unvented are gas room heaters listed for unvented use, in its fuel gas chapter (Section G2425.8). Section G2445.1 reads: “Unvented room heaters shall be listed in accordance with ANSI Z21.11.2 and shall be installed in accordance with the conditions of the listing and the manufacturer's instructions.” A wood stove is not one of them.
So a wood stove without a chimney really means a wood stove with a new chimney: insulated Class A pipe, never smaller than the stove’s flue collar. It goes straight up through the ceiling and out the roof with one of our wood stove pipe kits through the roof, or out through an exterior wall and up the outside.
Every wood stove chimney kit we sell is built on Class A pipe listed to UL 103 HT and matched to one route, in 6 or 8 inch, so choose the route first. The next sections compare the two routes and list the parts each one needs.
How It Works: Class A Chimney Pipe Replaces a Masonry Chimney
A Class A insulated chimney pipe is a factory-built chimney system that does everything a masonry chimney does, but without the bricks, mortar, and construction cost. Our Class A pipe is double-wall stainless steel with ceramic fiber insulation between the walls. The insulation keeps the outer wall cool enough to install with at least 2 inches of clearance to combustible materials like wood framing and drywall, as the installation instructions of the Class A system set.
Class A pipe is UL 103 HT listed, meaning it has been tested to withstand continuous flue gas temperatures and has survived chimney fire testing at 2,100 degrees F. It is the only type of pipe that is approved to pass through ceilings, floors, walls, and roofs. Regular stove pipe (the black single-wall or double-wall connector pipe) can never be used for this purpose.
Two Ways to Install: Internal vs. External
When your house has no chimney, you have two routes to get the pipe from your stove to above the roofline. Each has trade-offs:
| Internal (through the ceiling and roof) | External (through the wall and up the outside) | |
|---|---|---|
| Route | Stove pipe connects to Class A at a ceiling support box, pipe runs through attic and exits through roof | Stove pipe connects to Class A pipe inside the room; only the Class A pipe passes through the wall thimble, then a tee turns it 90 degrees upward and it runs up the exterior wall |
| Draft performance | Better: pipe stays warm inside the heated building | Weaker: pipe is exposed to cold outdoor temperatures |
| Creosote risk | Lower: warmer pipe means less condensation | Higher: cold exterior pipe cools gases faster |
| Appearance | Clean exterior look, pipe hidden inside the house (boxed in where it passes through rooms upstairs, as the instructions require) | Visible metal pipe on the outside of the building |
| Installation complexity | Requires cutting through ceiling, attic floor, and roof | Requires cutting through one exterior wall |
| Cost | Slightly higher (more components: ceiling support box, firestops, attic shield, roof flashing) | Slightly lower (fewer structural penetrations) |
| Best for | Primary heating systems, cold climates, best long-term performance | Situations where roof penetration is not possible or not wanted |
For most homes, the internal route is the better choice. Running the chimney inside the house keeps the pipe warmer, produces stronger draft, reduces creosote buildup, and looks cleaner from the outside. The external route is a good alternative when roof access is difficult, the attic layout makes a straight vertical run impossible, or you prefer not to cut through upper floors.
We have step-by-step guides for both approaches:
- How to install a chimney pipe through the house (internal route)
- How to install an external Class A chimney pipe (external route)
What Components Do You Need?
A complete no-chimney installation requires stove pipe inside the room and Class A chimney pipe from the transition point to above the roof. Here is the full parts list for each route:
Internal route (through ceiling and roof)
- Stove pipe: single-wall or double-wall black pipe from the stove's flue collar to the ceiling
- Ceiling support box: supports the transition from stove pipe to Class A and provides the required clearance at the ceiling penetration
- Firestop / radiation shield: installed at every floor or ceiling the pipe passes through above the ceiling support box, including where it passes into the attic
- Attic insulation shield: keeps loose insulation away from the pipe in the attic
- Class A chimney pipe sections: insulated pipe that runs from the ceiling support box through the attic and out the roof
- Roof flashing: seals the roof penetration around the pipe, matched to your roof pitch
- Storm collar: fits around the pipe above the flashing to prevent water from running down the pipe into the flashing
- Chimney cap: covers the top of the pipe to keep out rain, animals, and debris
- Roof brace kit: one extended roof brace if the pipe extends more than 5 feet above the roofline or its highest rigid support. Only one may be used: the pipe may rise no more than 10 feet above the roofline or its highest rigid support and no more than 5 feet above the brace, and a taller chimney needs a support engineered for the site
External route (through wall and up outside)
- Stove pipe: single-wall or double-wall black pipe from the stove to the Class A pipe inside the room; stove pipe never passes through the wall itself
- Wall thimble: insulated pass-through that allows the Class A pipe to safely penetrate the combustible wall
- Tee fitting: a T-shaped pipe section mounted on the outside wall that connects the horizontal wall penetration to the vertical run going up
- Tee cap: covers the bottom of the tee for inspection and cleaning access
- Wall support bracket: supports the weight of the vertical pipe run from the outside wall
- Class A chimney pipe sections: vertical run up the exterior wall
- Wall bands / brackets: secure the pipe to the wall every 4 to 8 feet, and no more than 8 feet apart, as the installation instructions of the Class A system (page 20) require
- Roof flashing and storm collar: only where the chimney passes through a roof overhang
- Chimney cap: same as internal route
- Roof brace kit: one extended roof brace if the pipe extends more than 5 feet above the top wall bracket or the roof flashing, with the same limits as on the internal route
Our complete chimney kits bring the parts of your route together in one package for your chimney height, so you are not sourcing individual parts and every part comes from one matched system. Each kit page lists what that kit carries and what it costs.
How Much Does It Cost to Install a Wood Stove Without a Chimney?
In October 2026 our straight lengths of Class A chimney pipe run between $73 and $277. The low end is the 6 inch diameter, 6 inch long section and the high end the 8 inch diameter, 48 inch long section, each with its live price on its own page. What your chimney costs in all depends on how much of it your route needs, because every part is priced on its own.
A complete run takes more than the straight lengths. The kit for your route adds the support, the chimney cap, the stove pipe and its adapters, and the roof flashing and storm collar where the chimney passes through a roof. Its kit builder shows the price of your exact configuration once you set the diameter and the heights.
Some costs of the job are not part of the chimney. The table shows who supplies each part.
| Part of the Job | Who Supplies It |
|---|---|
| Class A chimney pipe, its support and cap, and the roof flashing and storm collar where needed | Our chimney kits, or the lengths and parts on their own |
| Stove pipe and adapters inside the room | Our chimney kits |
| The stove itself | The stove’s supplier |
| Floor protection under the stove (a hearth pad) and any wall shield the stove’s manual calls for | The stove’s supplier or your installer, built to the stove’s manual |
| Labor, if you hire it | Your installer. Our guide to chimney installation cost gives labor ranges with their sources; ask your installer for a written quote. |
| Permit and inspection | Your building department, which sets its own fee |
Key Rules for No-Chimney Installations
Whether you go internal or external, these rules apply to every installation:
- Stove pipe stays in the room only: never run black stove pipe through a wall, ceiling, or floor. It is not rated for structural penetrations and is a fire hazard
- Class A pipe for all structural penetrations: only UL 103 HT-listed Class A insulated chimney pipe can pass through walls, ceilings, attics, and roofs
- 2-inch clearance to combustibles: maintain at least 2 inches between the Class A pipe outer wall and any combustible material (wood framing, drywall, insulation), as the installation instructions of the Class A system set
- Firestops and wall thimbles: every floor or ceiling the pipe passes through gets the ceiling support box or a firestop radiation shield, and a framed wall gets a wall thimble, as the installation instructions of the Class A system set out
- Meet the 3-2-10 rule: the chimney must be at least 3 feet above the highest point where it passes through the roof and at least 2 feet higher than any portion of a building within 10 feet, as NFPA 211 sets it and the installation instructions of our Class A system repeat. See our chimney height guide for calculation details
- Total chimney height: check your stove’s manual for any minimum height from the stove’s flue collar to the top of the cap, and build to it as well as to the 3-2-10 rule
- Do not share flues: the wood stove must have its own dedicated chimney. Never connect it to an existing furnace flue, water heater vent, or another appliance
- Alarms: fit smoke and carbon monoxide alarms where your building department and the alarm maker’s instructions say; our guide to carbon monoxide rules for a house with a stove sets out the code clauses
For a full overview of all applicable codes, read our guide on building and safety codes for chimney pipe installation.
Special Cases
Two-story homes
Installing in a two-story home without a chimney is absolutely possible. With the internal route, the Class A pipe runs from the first floor through the second floor and out the roof. Our multi-story chimney installation guide covers this scenario in detail, including how to handle firestops between floors.
Where the pipe passes through the second floor it must be enclosed, as the installation instructions of the Class A system set, with at least 2 inches of clearance to combustibles inside the enclosure. Boxed in, it looks like a built-in column and is kept from being touched.
Mobile homes and manufactured housing
Mobile homes have their own rules. Manufactured homes are built to the federal HUD Code (24 CFR Part 3280), and its Section 3280.709(g) lets a solid fuel stove listed for residential use go into one only when the stove and its installation meet that section’s conditions. Among them are a combustion air inlet that feeds the fire chamber directly, a means to attach the stove securely to the home, a listed factory-built chimney with a spark arrester, and no stove in a sleeping room.
The installation instructions of our Class A system add that not all appliances are listed for use in mobile homes, so check the stove’s manual first. Our guide to manufactured home wood stove rules also explains why the connector there is double-wall stove pipe; read it before starting.
Single-story with cathedral ceiling (no attic)
If you have a cathedral ceiling with no attic space, the Class A pipe runs from a ceiling support directly through the roof in one continuous vertical run. This is one of the simplest installations possible. Our cathedral ceiling installation guide walks through the process.
Cabins, sheds, and small outbuildings
Smaller structures are straightforward because the pipe runs are short. A straight vertical run through the roof is usually the best option. For a real-world example, see our article on installing a Class A chimney in a shed.
Do You Need a Permit?
Check with your building department before you start. Installing a wood stove and chimney system can require a building permit and an inspection by the local Authority Having Jurisdiction (AHJ). The installation instructions of our Class A system also say to contact your local Building Official or Fire Official about restrictions and installation inspection in your area.
The permit process checks your installation against the codes your state, county or town has adopted and against the stove and chimney pipe manufacturers’ instructions.
Skipping the permit can create problems when selling the home (the unpermitted installation may be flagged during the buyer’s inspection). The installation instructions of our Class A system also say that a chimney not installed as they describe voids the manufacturer’s warranty and may have an effect on your homeowner insurance, so ask your insurer what it needs to see before you install.
Get Started With a Free Chimney Design
Every house is different, and the best installation route depends on your floor plan, ceiling height, roof pitch, and stove location. Our team will review your situation and recommend the right components for your setup - free of charge.
Use our free chimney design service to get a custom recommendation within 24 hours. Send us your room dimensions, stove model, and a photo of the planned stove location. Or call us at 888-834-0880 (9 AM - 9 PM, 7 days a week).
You can also browse our installation guides and video library for step-by-step walkthroughs of every installation type.
Frequently Asked Questions
Can I Vent a Wood Stove Through a Wall Without Going Up Through the Roof?
You can exit through a wall, but the pipe must still go up. After passing through the wall, the Class A pipe turns 90 degrees upward using a tee fitting and runs vertically up the outside of the building. It must rise above the roofline and meet the 3-2-10 height rule. You cannot simply vent horizontally through a wall and stop there.
Is a Class A Chimney Pipe as Safe as a Masonry Chimney?
Both meet the code when each is built to its own rules: the IRC covers masonry chimneys in Section R1003 and factory-built chimneys such as Class A pipe in Section R1005. In short, Section R1005.3 requires a factory-built chimney serving a wood stove in a home to meet the Type HT requirements of UL 103.
Our Class A pipe is listed to UL 103 HT and rated for continuous use up to 1000 degrees F (538 degrees C); 2100 degrees F is the simulated chimney fire it is tested to survive, not a temperature it runs at. Install it to its instructions, with at least 2 inches of clearance to combustibles, and inspect it at least once every 2 months during the heating season, as those instructions advise.
Can I Install a Wood Stove in a New-Build Home?
Yes. A new build can take a Class A chimney from the start: work with your builder to plan the pipe route during construction, when it is easiest to install ceiling supports, firestops, and roof penetrations before the drywall goes up.
Can I Install a Class A Chimney Myself?
Yes. A capable owner can install a standard Class A chimney by following the installation instructions supplied with the system. Doing it yourself does not affect the Limited Lifetime Warranty on our Class A pipe, as long as it is installed to those instructions and the other warranty conditions are met. Ask your local building department about a permit and an inspection first.
Do I Need a Hearth Pad Under My Wood Stove?
Yes, unless your stove’s listing and manual say it may stand on a combustible floor without protection. Where your area adopts the International Residential Code, Section M1410.2 puts a room heater, such as a wood stove, on a noncombustible floor or a noncombustible assembly reaching at least 18 inches beyond the stove on all sides; for a listed stove, a listed floor protector may be used, and the stove’s manual sets its material and how far it extends.
The pad protects the floor from heat and stray embers. It is part of the stove installation rather than the chimney, so get it from the stove’s supplier or have your installer build it to the manual.
Need More Information?
Hopefully, you just got all the answers you need, but maybe you still have a question. If you want to know about this or any other topic relating to domestic burners and flue pipes, then please check out our FAQ page.
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