A clogged dryer vent doesn't just reduce efficiency—it's a genuine fire hazard that kills hundreds annually in the US. Before you hand over cash to a dryer vent cleaning service, knowing the right questions separates professionals from sloppy operators. Here's exactly what to ask.
Does the company guarantee they'll clean the entire vent line?
This is the most critical question. Many "dryer vent cleaners" only clean the vent hood or the easily accessible section inside your home, leaving lint buildup deep in the exterior ductwork where fires actually start. Ask specifically: "Will you clean from the dryer outlet all the way to the exterior hood?" A legitimate company will say yes without hesitation and explain their method (typically a motorized brush system or high-powered air).
If they seem unsure or vague about accessing the full vent, move on.
What equipment do they use?
Different tools tell you a lot about the quality of service. Standard industry equipment includes:
- Rotary brush systems – motorized brushes that physically scrub interior duct walls
- High-pressure air systems – compressed air that can blow out stubborn lint
- Video inspection cameras – to spot blockages and verify complete cleaning
- Duct booster fans – temporary units that improve airflow during cleaning
Ask what they'll use before arriving. If they only mention a shop vac or handheld brush, that's insufficient for proper cleaning. Video inspection is especially valuable because you'll see exactly what they found and whether the job is complete. Companies charging $150–$250 typically include this; budget versions ($75–$120) often skip it.
How long have they been in business, and are they insured?
Dryer vent cleaning requires specific expertise—it's not the same as general air duct work. Ask how many years they've specialized specifically in dryer vents, not just HVAC generally. Three years minimum is reasonable; five-plus is ideal. Then ask for proof of liability insurance. A professional service carries coverage in case they damage your home or cause injury. If they hesitate or say they're "working on it," that's a red flag.
Will they access the vent from inside and outside?
Your dryer vent runs from the appliance, through your wall cavity, and exits outside. Some companies only clean from one end, leaving lint trapped in the middle section. The best approach involves brushing from both directions to push all debris out. Ask: "Will you disconnect the dryer, clean from the indoor side, and then access and clean the exterior hood as well?" This is standard practice for quality work.
What does the price include, and is there a warranty?
Dryer vent cleaning typically costs $150–$300 for a single-story home, $200–$400 for multi-story (longer duct runs). Get a clear quote that specifies:
- Full vent line cleaning (indoor to outdoor)
- Whether video inspection is included
- Any additional charges (accessibility issues, blockage removal, duct repair)
- Cleanup and debris removal
Ask if they guarantee the vent will be cleaned to manufacturer specifications or if they offer a re-service guarantee. Some companies promise to return free if blockages return within 30 or 60 days.
How often should I get this done?
This question actually tells you if they're honest. A reputable technician will say: "Most homes need cleaning annually, but it depends on usage and lint buildup." If they push you toward quarterly service or claim you need it done next month regardless of your situation, they're prioritizing revenue over your needs. Ask them to explain what they find during the inspection—that's your real indicator of frequency.
Can you provide references or online reviews?
Check Google, Yelp, and Better Business Bureau ratings. Look specifically for reviews mentioning whether the company cleaned the entire vent and if customers saw before/after video. If you're unsure which local companies are trustworthy, Mercoly makes it easy to compare vetted dryer vent cleaning providers in your area side-by-side.
Frequently Asked Questions
Q: How do I know if my dryer vent actually needs cleaning? Look for longer dry times, lint around the exterior hood, or a burning smell when running the dryer—these are clear signs. Many professionals include video inspection so you can see buildup yourself.
Q: Can I clean my dryer vent myself? You can clean the indoor duct section with a vent brush kit ($20–$40), but accessing and cleaning the full exterior vent safely requires professional equipment and expertise.
Q: What's the difference between a dryer vent cleaning and air duct cleaning? Dryer vents are small, lint-specific ducts that need different tools than whole-home HVAC ductwork; use a specialist, not a general air duct cleaner.
Get multiple quotes and ask every company these questions—you'll spot the thorough pros immediately.