Bushfire smoke can affect Sydney homes even when the fire is many kilometres away. Here’s how to protect the air inside your home, and how to clean safely once conditions have improved.
During bushfire season, Sydney households can face smoky skies, poor air quality and the smell of smoke finding its way indoors. You might notice a lingering odour, dust on the window sills and fine particles settling on exposed surfaces. The natural instinct is to throw every window open and start cleaning, but with bushfire smoke, the order you do things in matters. First make sure the outside air is safe, so you’re not simply bringing more smoke inside.
The short version
While smoke is heavy, keep windows closed, use air-con on recirculate and skip evaporative cooling. Once the air clears, ventilate, then damp clean surfaces, vacuum and mop floors, and wash affected fabrics. Heavy ash, soot or fire damage is a job for specialists, not a regular clean.
1. Check the air quality before opening windows
If bushfire smoke is still affecting your area, keep windows and external doors closed where possible. Opening up during a smoke event only lets more fine particles in. Check current conditions on the NSW Government’s air quality website and follow any emergency advice.
While smoke is heavy
Keep the smoke out
- Keep windows and external doors closed where practical
- Don’t use evaporative cooling; it pulls outdoor air inside
- Avoid candles, incense and other indoor smoke
Once the air has cleared
Let the house breathe
- Use air-con on recirculate while smoke is around
- Open windows to ventilate when air quality improves
- Then start the clean-up
The simple rule: during heavy smoke, limit how much outside air gets in. Once the air has cleared, ventilate.
2. Understand what bushfire smoke leaves behind
Bushfire smoke is a mix of gases and fine particles. Some particles are small enough to stay suspended in the air and drift indoors through gaps, vents and open doors. Larger particles and ash settle onto surfaces. You might notice deposits on:
- Window sills
- Furniture
- Floors
- Outdoor tables
- Window tracks
- Balconies
- Cars
- Entryways
Not every smoke event leaves visible ash inside, and a home can have poor indoor air even when surfaces look clean. That’s why it helps to treat surface cleaning and indoor air quality as two separate jobs.
3. Consider a HEPA air purifier
A good air purifier with a HEPA filter can help reduce airborne smoke particles indoors. Choose one sized for the room, use it in a reasonably well-sealed space, and follow the manufacturer’s instructions for running it and changing filters.
An air purifier won’t remove all the gases and odours from bushfire smoke, and it doesn’t replace keeping smoke out of the house in the first place.
Don’t rely on candles, incense or strong fragrances to mask the smell. They add more pollutants to the air inside.
4. Start cleaning only when conditions are suitable
Once the outdoor air has improved and there are no safety concerns, you can get on with normal household cleaning. Start by looking at how much residue there is, and what kind. A light film of settled dust after a distant smoke event is very different from the heavy ash, soot or debris that comes with a fire close by.
Not a normal clean
If there’s a significant amount of ash, unusual residue or possible contamination, don’t treat it as everyday cleaning. Fire debris can contain hazardous substances, especially where buildings, treated timber, plastics or other materials have burnt. Follow the NSW Government’s clean-up advice and get specialist help where needed.
5. Clean accessible hard surfaces carefully
For everyday surfaces that are only lightly dusty, use a damp cleaning method suited to the material. Depending on the surface, that might include:
- Window sills
- Benchtops
- Tables
- Shelves
- Cabinet exteriors
- Doors
- Other washable surfaces
- Use a suitable detergent and water, and follow the surface manufacturer’s instructions.
- Avoid vigorous dry dusting, which sends fine dust straight back into the air.
- Use clean cloths and rinse or swap them often, so you’re not moving residue from one surface to the next.
- Heavy soot or fire-damage contamination needs professional cleaning.
6. Give floors extra attention
Floors pick up dust and particles carried in on shoes, clothes and pets. For ordinary household dust, a well-maintained vacuum with good filtration does the job, followed by a damp mop on hard floors with a product suited to the surface. Pay attention to:
Don’t use a standard household vacuum to pick up significant amounts of ash, soot or fire debris. It can damage the vacuum, push fine particles back into the air, and the material may need hazardous-waste precautions.
7. Wash affected bedding and washable fabrics
Smoke odours can cling to fabric. If bedding, clothes or washable soft furnishings have been affected, check the care labels and wash accordingly. That might include:
Dry everything thoroughly. For curtains, upholstery, rugs and mattresses, follow the manufacturer’s instructions; some materials need specialist cleaning after heavy smoke exposure. Perfume or fabric freshener won’t remove smoke contamination.
8. Check windows, doors and entryways
Window sills, tracks and doorways collect windblown dust and residue. Once it’s safe, check these accessible areas and remove ordinary dirt using a method suited to the surface.
Don’t dry-brush or disturb substantial ash deposits. If ash is present outdoors, follow official guidance on protective equipment, collection and disposal, and never wash ash into stormwater drains or blast it away with high-pressure water.
9. What if your home still smells smoky?
A lingering smoke smell won’t always disappear with surface cleaning. Odours can stay in soft furnishings, carpets, ventilation systems and other porous materials. Start by ventilating when outdoor air quality is good, then clean affected washable surfaces and fabrics. If the smell remains, carpets, upholstery or other materials may need a professional assessment.
If your property was directly affected by fire or heavy smoke, contact a specialist fire and smoke restoration contractor. Everyday residential cleaning is not fire damage remediation.
10. Take extra care around children and vulnerable household members
Bushfire smoke can be a particular concern for:
- Babies and young children
- Pregnant people
- Older adults
- People with asthma
- People with heart or lung conditions
If someone in your household is sensitive to smoke, follow their healthcare professional’s advice and consider having someone else do any cleaning that disturbs settled particles. If smoke is significantly affecting the air inside, it may be appropriate to stay somewhere with better air for a while, if it’s safe to do so.
Get medical advice for any concerning symptoms. Call Triple Zero (000) in a medical emergency, such as severe difficulty breathing or chest pain.
11. When should you call a specialist?
Some situations are well beyond a normal house clean. Seek specialist advice when:
- Your property has been damaged by fire
- There’s heavy soot or ash contamination
- You suspect asbestos or other hazardous building materials
- Chemical residues or fire retardants may be present
- Smoke has got into the main ventilation system
- Strong odours persist after significant exposure
- The property may be structurally unsafe
Never enter a fire-affected property until emergency services confirm it’s safe. If you rent, let your landlord or property manager know about any damage or contamination. If you own the property, contact your insurer before starting substantial restoration work that could be part of a claim.
Bushfire smoke home cleaning checklist
While outdoor air quality is poor
- Check NSW air quality advice
- Keep windows and doors closed where practical
- Use air-con recirculation where available
- Avoid evaporative cooling
- Use a suitable HEPA air purifier if you can
- No candles, incense or other indoor smoke
- Follow medical advice for vulnerable household members
When outdoor conditions improve
- Ventilate the home
- Check for visible dust or residue
- Decide whether any ash or soot needs specialist handling
- Damp clean suitable hard surfaces
- Vacuum and mop ordinary household dust from floors
- Wash affected bedding and clothing
- Check window sills and accessible tracks
- Assess carpets, curtains and upholstery
- Replace or clean air filters as the manufacturer advises
Seek professional advice if
- Fire debris or a lot of ash is present
- There’s significant soot contamination
- Hazardous materials may be involved
- The property has been damaged by fire
- Strong smoke odours remain after substantial exposure
Can a professional house cleaner help after bushfire smoke?
A residential cleaning service can help with ordinary household dust, washable surfaces, floors and similar tasks after a smoke event. It’s important to explain the situation before booking: a standard cleaning service shouldn’t be expected to handle hazardous ash, heavy soot, contaminated debris or specialist smoke restoration.
At Clean Concept, we provide regular and deep cleaning across Sydney and the North Shore. If your home needs a standard deep clean after a period of poor air quality, we can look at the property and confirm whether the work falls within our normal cleaning scope. Our aim is a careful, appropriate clean, without promising anything that really needs specialist remediation.
Should I open the windows to clear the smoke smell?
Only once outdoor air quality has improved. While smoke is still around, keep windows and doors closed where practical, because opening them lets more fine particles in. Check the NSW air quality website before ventilating.
Will an air purifier remove bushfire smoke?
A HEPA air purifier sized for the room can help reduce fine smoke particles indoors, especially in a well-sealed space. It won’t remove all the gases and odours, and it doesn’t replace keeping smoke out.
Can I vacuum up ash?
Ordinary household dust is fine to vacuum with a well-maintained vacuum. Don’t use a standard household vacuum on significant amounts of ash, soot or fire debris; follow official clean-up guidance and get specialist help.
Can Clean Concept clean my home after bushfire smoke?
We can help with ordinary household dust, surfaces, floors and fabrics as part of a regular or deep clean once conditions are safe. Heavy ash, soot, fire damage or contamination needs a specialist fire and smoke restoration contractor.
After the smoke clears
A comfortable home begins with thoughtful care, and knowing when a job needs a specialist.
Contact Clean Concept to talk through your household cleaning needs. We’ll be upfront about what a regular or deep clean can cover.
More from the journal
- NSW Health: Protect yourself from bushfire smoke
- NSW Health: Know if you are at higher risk from bushfire smoke
- NSW Government: Air quality
- NSW Government: Bushfire clean-up advice
This guide is general information only and isn’t medical or safety advice. Always follow current NSW Government and emergency service advice.
