Fireplaces and flues
Wood stoves in Portland, the labels, permits and chimney checks that come with them
We sweep wood stoves across the Portland metro, connector pipe to cap, and read the label on the back for a home sale. Trouble usually comes from creosote laid by damped-down burns, or a stove venting into a fireplace flue too big for it.
Updated
What a wood stove is and how it vents
A wood stove is a freestanding steel or cast iron firebox with a door, an air control and a connector pipe to a chimney, and it heats the room from its own hot body rather than from an open fire.
The connector pipe, single or double wall, runs up through a ceiling support box into an insulated Class A metal chimney, or sideways through a thimble into a masonry flue. A stove on a masonry chimney needs a stainless liner sized to its outlet, since an old fireplace flue is too large and too cold for it.
Census figures make wood the main heat for about one Oregon household in twenty, about one in twenty-five in Clackamas County, and fewer than one in a hundred inside Portland.
How to tell what you have
The label, the baffle and the chimney top tell us what stove you have.
- A label on the back or the pedestal: a DEQ or EPA label means the stove met an emissions standard when built; a UL safety label alone is not the same thing.
- A bypass lever and a honeycomb combustor above the firebox on a catalytic stove; perforated steel tubes or a ceramic baffle across the top on a non-catalytic one.
- Outside, a round insulated pipe with a storm collar and cap above the roof, or a brick chimney with a stainless cap and liner top sized to the stove.
What you will find in Portland homes
The wood stoves in Portland metro houses sort by age and by how they burn.
| Type or model | Era | Notes |
|---|---|---|
| Pre-1940 antique parlor and cook stoves | Before 1940 | Ornate cast iron, often more decoration than heater; Oregon exempts a pre-1940 ornate stove of real value from the home-sale rule, and Portland still requires a permit to install one. |
| Uncertified steel box stoves | 1970s to mid 1980s | Thick plate steel airtights from the energy crisis years, no baffle or tubes, heavy creosote makers when damped down; built before the labels existed, so the removal law catches them. |
| DEQ and EPA labeled non-catalytic stoves | Mid 1980s to current | The state label from the mid 1980s, the federal one from 1988; secondary air tubes and a ceramic baffle burn the smoke twice, the tubes sag and the baffle cracks with age, and a sweep means lifting the baffle. |
| Catalytic and hybrid stoves | current | A honeycomb combustor behind a bypass burns smoke at low temperatures for long, slow burns; it plugs with ash and wears out, so we check it with a light and a soft brush. |
What goes wrong and what fixes it
Each wood stove problem below names the visit that fixes it.
-
Creosote in the connector pipe and the flue, heaviest in the first elbow and at the cap
Pipe taken down or brushed in place, flue swept through the stove with the baffle out, firebox vacuumed, photos before and after Wood Stove and Insert Sweep, from $279
-
A buyer or seller asking what the label and the chimney mean for the sale
The label photographed, connection and clearances checked, the flue scanned, and a written opinion for the closing Real Estate Chimney Inspection, from $349
-
A stove venting into a fireplace flue or a bare brick chimney far larger than its outlet
Stainless liner cut to the stove collar size, insulated on an outside wall, with a tee and cleanout at the thimble Chimney Liner Installation, from $1999
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Glazed third-degree creosote after winters of damped-down overnight burns
Rotary cleaning or a chemical treatment first, then a change to the burning habits that made it Creosote Removal, from $449
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Smoke puffing back when the door opens, a glowing pipe, or a chimney fire last season
A camera inspection at Level 2 of pipe and flue before the next fire, with the images Chimney Inspection, from $129
What a wood stove sweep covers that a fireplace sweep does not
A stove sweep takes the system apart further: the connector pipe comes down or gets brushed in place, the baffle or combustor comes out so the brush reaches the flue, and the stove body is vacuumed.
Single-wall pipe builds creosote faster than the flue above because it cools the smoke first, so the elbows and the first few feet get the closest look and get photographed before and after.
With the firebox empty we check the firebrick for cracks, the baffle for sag, the tubes for burn-through, the combustor for plugging and the door gasket for a seal, then the clearances, the hearth pad and the pipe screws.
What the label on your wood stove means when you sell a Portland home
Oregon requires an uncertified wood stove or insert to be removed and destroyed when the home is sold, and the label on the back of the stove decides which side of that line yours is on.
A stove with a DEQ or EPA label met an emissions standard when it was made and can stay. One with no such label, or only a safety listing, is uncertified: it cannot be labeled later or legally sold or given away in Oregon, and it comes out of the house, garage or shop at the sale.
The seller handles removal before closing unless the buyer agrees in writing to take it on and then has thirty days after closing. Destroyed means made unusable as a heater, with a disposal receipt and a report to DEQ; the home-sale guide covers the forms.
Permits, clearances and the Portland stove that was never inspected
Portland requires a permit and an inspection for any wood stove installation, antique or new, and a stove that went in without one is something we check for in every older basement and shop.
The signs are single-wall pipe through a wall with no thimble, a stove crowding a paneled wall, a hearth pad that stops short, or a pipe into the furnace flue. A listed stove keeps the clearances on its label; in Portland an unlisted one needs four feet to anything combustible and a pad eighteen inches beyond it.
A stove missing any of that stays cold until an installer corrects the venting under a permit, and our report gives them the measurements. If the pipe is roaring or glowing right now, get everyone out of the house and call 911; the air controls can wait.
Wood stove questions
How do I tell if my wood stove is uncertified under Oregon's law?
Look on the back or the pedestal for a metal label from Oregon DEQ or the EPA. If there is none, or only a UL safety label, the stove is uncertified. A stove cannot be labeled after the fact and DEQ keeps no list to check, so the plate is the whole test.
Does a wood stove need its own chimney liner in a Portland house?
Yes when it vents into a masonry chimney rather than its own metal pipe. An old fireplace flue is far larger than the stove outlet, so the smoke cools, slows and leaves creosote on the brick; a liner matched to the collar, insulated on an outside wall, keeps the draft up and the gases inside.
How often should a wood stove be swept if we burn every day in winter?
Check the pipe monthly in the burning season and sweep once the buildup reaches an eighth of an inch. For a stove run daily on damped-down overnight burns that can come twice in one winter. Tap the elbow and listen for flakes; a stove burned hot on dry wood may go a full season.
Can an uncertified wood stove stay if the buyer agrees to keep it?
No. The buyer can agree in writing to take over the removal, but that gives them thirty days after closing to have the stove removed, destroyed and reported to DEQ, not permission to keep burning it. Only a stove with a DEQ or EPA label stays for good.
What is the difference between a catalytic and a non-catalytic wood stove for maintenance?
The catalytic stove has one extra part to look after, the honeycomb combustor behind its bypass. It needs a gentle cleaning each season and replacement after years of use, while a non-catalytic stove's air tubes and ceramic baffle need nothing until they sag or crack. Both need the flue swept on the same schedule.
Related pages
Wood stove calls near you
Wood stove work has taken us to Raleigh Hills and Garden Home, Tigard, Alberta Arts District and Concordia and the rest of the metro, and the posted price is the same at every address.
Other fireplace and flue types
Ready to book a sweep?
Call with what the fireplace is doing, or text a photo of the opening and one of the chimney top, and we will name the service and its posted price before we come out.