Quick answer
A fireplace smokes into the room when the chimney can't draft properly. Common causes are a closed or partly closed damper, a cold flue, a blockage like a nest or creosote, a flue that is too small for the fireplace opening, a chimney that is too short, or negative air pressure inside the house.
Quick checks
- Make sure the damper is fully open.
- Warm the flue first: hold a rolled-up lit newspaper up near the damper for a minute before lighting.
- Crack a window near the fireplace to relieve negative pressure.
- Burn only dry, seasoned wood.
Problems that need a professional
- Blockage from nests, debris or heavy creosote
- Flue too small for the fireplace opening
- Chimney too short or blocked by nearby trees or rooflines
- Smoke chamber that is rough or poorly shaped
Smoke in the house also means carbon monoxide can get in. If it keeps happening, stop using the fireplace and have it inspected.
More questions
Why does my fireplace only smoke at the start of a fire?
Usually a cold flue. Warming the flue before lighting and starting with a small, hot fire helps establish the draft.
Need a local professional?
Chimney Champs has been a local chimney company for 13 years. We provide fireplace & stove services in your area. Call (856) 300-9215 for a free estimate.
Sources & further reading
- NFPA 211 — Standard for Chimneys, Fireplaces, Vents, and Solid Fuel-Burning Appliances (National Fire Protection Association)
- Chimney Safety Institute of America (CSIA)
Keep reading
- How Often Should You Clean Your Chimney?
- How to Get Your Fireplace Ready for Winter: A 10-Step Checklist
- Why Does My Chimney Smell? 5 Causes and Fixes
- The Best Firewood to Burn (and What Never to Burn)
- Gas Fireplace Maintenance: What Needs Checking Every Year
- Wood Stove and Insert Maintenance: A Season-by-Season Guide