A little preparation helps your air duct cleaning go faster and more smoothly. Use this checklist to get vents, access points, pets and parking ready before the crew arrives.
A professional air duct cleaning goes faster and more smoothly when the crew can get straight to work. Most of the preparation is simple: clear the way to the vents, make sure the attic or crawlspace is reachable, and plan for pets and parking. Here is a practical checklist to help you prepare for an air duct cleaning appointment in your Los Angeles home.
One or two days before
Find every register and return
Walk through the house and note where every supply register (where air comes out) and return grille (where air is pulled in) is located. Do not forget bathrooms, closets, hallways and any rooms that were added later. Older Los Angeles homes, especially 1900s–1940s Craftsman and Spanish-style houses, often have registers in floors or low on walls that are easy to overlook.
Clear space around vents
Move furniture, rugs, beds, toys and stored items away from registers and return grilles so the crew has room to work. A clear area of a few feet is helpful. If a heavy piece of furniture sits on top of a floor register, let the company know ahead of time rather than trying to move it yourself.
Remove fragile items nearby
Take down framed photos and decorations right next to wall or ceiling registers, and move delicate items off nearby shelves. Crews protect floors and furniture near the work area, but there is no reason to leave breakables within reach of ladders and hoses.
Open the path to the equipment
Find your furnace or air handler. It may be in a hallway closet, garage, attic or under the house. Clear stored boxes and household items so the equipment and filter slot are reachable.
Check attic and crawlspace access
If ductwork runs through the attic, clear the area under the attic hatch and make sure the hatch opens. If it runs under the house, check that the crawlspace door is not blocked by plants, storage or a locked gate. Hillside homes sometimes have crawlspace access on a steep side yard; let the company know if reaching it is tricky.
The day of the appointment
Plan for parking
Professional equipment and hoses need to reach the house, so the crew will want to park as close to the front door as possible. In many Los Angeles neighborhoods, street parking is tight. If you have a driveway, keep a space open. If you live in a condo, apartment or building with a gated garage, share gate codes, loading zone details or any building rules in advance. Commercial customers should arrange access with building management.
Secure pets
Equipment noise, open doors and strangers moving in and out can stress animals. Keep dogs and cats in a closed room away from the work, or plan for them to spend the day elsewhere. Make sure gates are closed if pets are in the yard.
Turn the thermostat off
The system should not run while the ducts are being cleaned. The crew will normally shut it off themselves, but switching the thermostat to “off” before they arrive is a good habit. They will turn it back on to test the system at the end.
Have an adult home
Someone should be there at the start to show the crew around, point out any problem rooms or concerns, and confirm the scope of work. Plan to be available at the end for a walk-through.
Point out anything unusual
Tell the crew about past pest problems, recent remodeling, rooms that get dusty quickly, rooms that never seem to get enough air, or smells from the vents. If your home was affected by wildfire smoke, for example during the January 2025 fires, mention that as well. Our guide on air ducts after wildfire smoke covers that situation.
Questions to ask before you book
A good company will be glad to answer these. The U.S. EPA’s consumer guide Should You Have the Air Ducts in Your Home Cleaned? suggests several of them.
- Will you inspect the system first? The EPA recommends that the provider inspect the system before cleaning.
- What will be cleaned? The EPA says the provider should agree to clean all components of the system, not just the ducts. Ask whether registers, grilles, the return plenum and accessible blower parts are included.
- How will my home be protected? The EPA advises asking providers to protect carpet and household furnishings.
- What equipment do you use? The EPA says vacuum equipment should exhaust particles outside the home or use HEPA filtration if it exhausts inside.
- Will you apply any chemicals? The EPA advises against allowing chemical biocides or treatments unless you fully understand the pros and cons. Ask what is proposed and why.
- Do you follow industry standards? The EPA suggests asking whether the company complies with the National Air Duct Cleaners Association’s (NADCA) air duct cleaning standards.
- How is the price determined? Ask what is included, whether the estimate is based on seeing the system, and what could change it. Our article on air duct cleaning cost in Los Angeles explains the main factors.
Be cautious of phone quotes that sound too good to be true. Our guide on how to avoid air duct cleaning scams covers common warning signs.
Add-ons worth considering
If the crew is already there, it can be efficient to handle related work in the same visit:
- HVAC cleaning for accessible parts of the furnace or air handler.
- Dryer vent cleaning, especially if clothes are taking longer to dry.
- Air duct sanitizing, if you have discussed it and understand what is involved.
After the cleaning
Do the walk-through with the crew, look inside a few registers yourself, and ask any remaining questions. Then put in a fresh filter so the clean system starts with clean filtration. If you want to know what the crew is doing while they work, read what happens during professional air duct cleaning.
Schedule your appointment
WINN AIR CORP provides air duct cleaning for homes and businesses across Los Angeles and nearby communities, and we are happy to answer any of the questions above before you book. Call (213) 596-9955 or request a free estimate.
Frequently asked questions
Should I change my air filter before or after duct cleaning?
After. Leave the current filter in place until the cleaning is done, then put in a fresh one so the clean system is not pulling air through an old, packed filter. Ask the crew whether they will replace it or whether you should have one ready, and confirm the correct size.
Do I need to be home during the appointment?
It helps to have an adult home at the start to show the crew around and answer questions about the system, and at the end for the walk-through. In between, you can usually go about your day in other parts of the house.
Can I run the AC or heat right after duct cleaning?
Generally yes, once the crew has reassembled everything, sealed any access openings and turned the system back on to test it. Ask them to confirm before they leave.