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Gas Fireplace Chimney & Vent Cleaning in Seattle, Tacoma & Everett
No creosote, but gas vents still clog: corrosion flakes, debris, nests and blocked caps. We clean the vent and check it drafts. Free quote, same-day often.
- Free 2nd-opinion quotes
- Price match + 10–25% discount
- Same-day service often available
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A gas fireplace does not make creosote, so many owners assume its chimney never needs cleaning. The vent still needs it. Gas exhaust is wet and mildly acidic, and over years it corrodes the inside of a B-vent or the liner in an old masonry chimney, leaving flakes that fall and collect at the bottom. Open termination caps invite birds, squirrels and leaves. Direct-vent pipes get spider webs and debris in the intake. Any of these can restrict the exhaust, and a restricted gas vent pushes combustion gases, including carbon monoxide, back toward the room.
This page is about cleaning the chimney or vent that carries a gas fireplace's exhaust. Servicing the fireplace unit itself, the glass, logs, burner and pilot assembly, is a separate job described on our gas fireplace cleaning page. For the umbrella of everything gas, see gas fireplace services.
Our qualified technician handles all work on and around gas appliances; none of it is homeowner work. We serve Seattle, Tacoma, Everett and the road-accessible Puget Sound from our Renton office. The quote is free, a second-opinion quote is free, and we price match a written quote and take 10–25% off. Call 206-453-2045.
Symptoms
Signs you need chimney gas fireplace cleaning
- A faint exhaust or chemical smell in the room when the fireplace runs
- Flames that lift, flutter or burn lazy and yellow instead of steady
- The unit shuts itself off after a few minutes of running
- Rust flakes or fine grit in the firebox or behind the louvers
- Chirping or scratching from the vent, or twigs at the termination cap
- Soot streaks on the glass or the wall above a fireplace that never sooted before
- A carbon monoxide alarm that has sounded while the fireplace was on
- The termination cap outside looks rusted, bent or stuffed with debris
Common causes
- Acidic condensation in the exhaust corroding the vent wall and shedding flakes
- Birds or squirrels nesting in a termination cap with damaged or missing screening
- Leaves, needles and moss debris falling into an open or uncapped vent
- Spider webs and dust blocking the intake side of a direct-vent pipe
- A vent cap crushed or shifted by a storm or a roofer
- A masonry chimney never relined for gas, so the old clay flue deteriorates and sheds
How It Works
Our chimney gas fireplace cleaning process
Our technician starts at the appliance and works up. With the fireplace off, we inspect the vent connection at the unit, look for corrosion flakes and debris at the base, and check the vent run where it is visible. Where a camera will fit we scope the vent or chimney to find the restriction and to see the condition of the liner or pipe wall. At the top we check the termination cap and its screening. If the vent is corroded through, undersized for the appliance, or an old masonry flue with no gas-rated liner, we tell you, because cleaning does not fix those and a gas-rated liner may be the real answer.
Shut down and inspect
Our technician turns the appliance off, lets it cool, and examines the vent connection, vent run and termination cap.
Scope the vent
A camera pass where the vent allows, to locate debris, nests, corrosion and any damage to the pipe or liner.
Clear the termination cap
Nests, leaves and debris are removed from the cap and its screening, and the cap is checked for rust, fit and damage.
Clean the vent run
Soft brushes and vacuum extraction sized to the vent remove corrosion flakes and debris without scratching the pipe wall or damaging a liner.
Clean the base and connection
Flakes and grit at the bottom of the vent and at the appliance collar are vacuumed out and the connection is re-checked.
Relight and verify
Our technician relights the appliance, confirms the flame pattern is correct and the vent is drawing, and gives you a written summary with a free quote for anything found.
Options
Repair and service options
Gas vent cleaning is quoted after we see the vent type and what is in it. It can include:
- B-vent cleaning: the double-wall metal vent used with many gas fireplaces and log sets, cleaned of corrosion flakes and debris end to end.
- Direct-vent cleaning: clearing the coaxial exhaust and intake pipe, including webs and debris in the intake that starve the flame of air.
- Masonry chimney with a gas liner: cleaning the liner and clearing the base; if there is no gas-rated liner, we explain why one is recommended and quote a liner installation.
- Termination cap repair or replacement: a rusted, crushed or unscreened cap is the usual reason debris and animals got in; see chimney cap replacement.
- Animal or nest removal: live animals or active nests are handled under animal and nest removal before the vent is cleaned.
- Unit service on the same visit: glass, logs, burner and pilot assembly, under gas fireplace cleaning.
If you are not happy, we are not done, and we come back at no charge.
Pricing
What affects the price
- Vent type: B-vent, direct-vent or a lined masonry chimney
- What is in the vent: loose debris, a nest, or corrosion flakes along the full run
- Length and routing of the vent and whether a camera can reach it
- Condition of the termination cap and whether it needs replacing
- Whether an active nest or live animal must be removed first
- Whether the appliance is serviced on the same visit
- Roof access to the termination
Every chimney is different, so you get a written quote after we look at the system. Ask about our price match and free second-opinion quote.
Safety & Seattle Conditions
Safety considerations
If you smell gas, anywhere, at any time: leave the house, do not switch anything on or off, and call your gas utility or 911 from outside. That is the only step a homeowner should take. Our technician does all work on the fireplace, its valve, its pilot and its vent; please do not open the unit, adjust the gas, or clean the vent yourself. A gas fireplace that smells of exhaust, shuts itself off, or burns with a lazy yellow flame should be left off until the vent has been checked, because a restricted gas vent is how carbon monoxide ends up in a living room. Keep a working CO alarm near any gas appliance.
NFPA 211 recommends an annual inspection for gas-vented chimneys and vents just as it does for wood, and the vent is the part most gas fireplace owners never think about.
Seattle & Puget Sound conditions
Gas vents in the Puget Sound get two things the exhaust does not like: constant moisture and a lot of organic debris. With 40.34 inches of annual precipitation at Sea-Tac and roughly 150–156 days a year with measurable rain, a vent cap that is not tight lets water in, and water plus acidic gas condensation is what eats a vent wall. Moss spreads here from October through April on shaded, slow-drying surfaces and its debris, along with needles from overhanging trees, ends up in open caps.
Many of the region's gas fireplaces are retrofits in older masonry chimneys, in homes built around Seattle's median year of 1976 or Tacoma's 1967, and those are the ones we most often find shedding old clay-tile fragments into the base of the vent.
Our Work
Chimney Gas Fireplace Cleaning in action
Get your gas fireplace vent cleared and drafting
Corrosion, debris, nests and blocked caps cleared by our qualified technician. Free quote, price match plus 10–25% off. Call 206-453-2045.
☎ 206-453-2045 Request a QuoteQuestions
Chimney Gas Fireplace Cleaning FAQ
Does a gas fireplace chimney really need cleaning?
Yes, just not for creosote. Gas exhaust is wet and slightly acidic, and over time it corrodes the inside of the vent, leaving flakes that collect at the bottom. Open caps let in nests and debris. A restricted vent sends exhaust and carbon monoxide back toward the room, which is why an annual check, and a cleaning when the vent needs it, still applies to gas.
How do I know if my gas fireplace vent is blocked?
The common signs are an exhaust smell when the unit runs, a flame that lifts or flutters or burns lazy and yellow, a unit that shuts itself off after a few minutes, rust flakes in the firebox, or new soot on the glass. Any of those means turn the fireplace off and call us. If you smell gas rather than exhaust, leave the house and call the gas utility or 911 first.
Is this the same as a gas fireplace cleaning?
No. This page covers the chimney or vent that carries the exhaust out of the house. Gas fireplace cleaning covers the appliance: glass haze, log and ember placement, burner ports, the pilot assembly and the blower. Many customers book both on the same visit, and our technician handles both. The vent is the half most owners forget.
Can I clean the gas vent or relight the fireplace myself?
We ask that you do not. Gas vent work involves disconnecting and reconnecting the vent at the appliance and checking the flame and draft afterward, and that belongs to our qualified technician. Anything involving the gas valve, pilot or burner is never homeowner work. If the fireplace will not light or stay lit after we are done, call us rather than working on it.
What if a bird is nesting in the vent cap?
We remove it, and we handle it carefully because some birds, including chimney swifts, are protected under the Migratory Bird Treaty Act. An active nest is dealt with under our animal and nest removal service, then the vent is cleaned and the cap is repaired or replaced with proper screening so it does not happen again.
My gas logs sit in an old brick chimney. Does that change anything?
Often, yes. Gas exhaust in an unlined or clay-tile-lined masonry chimney deteriorates the flue over time, and the debris ends up at the base. We clean it out, but if the chimney has no gas-rated liner we explain why one is recommended and quote a liner installation. Cleaning a flue that keeps shedding is a short-term fix.
Do you clean gas fireplace vents in Tacoma and Everett?
Yes. We serve Seattle, Tacoma, Everett and the road-accessible Puget Sound from our Renton office. Same-day service is often available when a fireplace is shutting off or smelling of exhaust. The quote is free, and we price match a written quote and take 10–25% off. Call 206-453-2045.
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