Hiring an air duct cleaning company feels straightforward until you start calling around and every business claims to be the best option. Some quote suspiciously low prices. Others give vague answers when you ask what’s actually included. A few won’t answer basic questions at all.
We’ve been in this industry for 15 years, and we’ve seen firsthand how many corner-cutting and bait-and-switch outfits operate in this space: the $99 whole-house ads that turn into $400 once someone’s inside your home, the companies that skip the inspection entirely. We put this checklist together because we care about homeowners actually getting what they pay for, whoever they end up hiring. Here’s what to work through before booking anyone in Charleston.
TL;DR
- Confirm NADCA certification before hiring anyone
- Get a written estimate that spells out scope and cost
- Ask what equipment they use, since commercial-grade vacuums and brushes matter
- Check for experienced, trained technicians and a service guarantee
- Request before-and-after photos and proof of liability insurance
- Read specific reviews, not just star ratings, and watch for red flags like no inspection or pressure to add extras
1. Check Whether They Hold NADCA Certification
The National Air Duct Cleaners Association sets the industry standard for duct cleaning procedures. A NADCA member company has technicians trained to follow established best practices, rather than improvising their own approach.
Ask directly whether the company holds this membership certification, and don’t be afraid to ask for confirmation. A legitimate company will have an actual member number or certificate they can show you, not just a claim on their website. For example, R&E Home Solutions is a member of NADCA since 04/30/2020, and our technicians are NADCA-certified.
If a company hesitates, dodges the question, or can’t produce anything to back up the claim, that’s worth crossing off your list in favor of one that can.
2. Get a Written Estimate Before Any Work Starts
A trustworthy company gives you a price only after inspecting your system, not before. Duct length, accessibility, contamination level, and system complexity all affect the actual cost, so a number given without ever seeing your ductwork is a guess at best.
Get that pricing in writing once the inspection is done. The estimate should spell out the scope of the job, what’s included, and the total cost, not a rough verbal number that changes once technicians arrive.
Watch for companies that quote a flat price over the phone with no inspection and no follow-up documentation. That’s often how “special” pricing turns into a much higher bill once someone’s already inside your home.
R&E Home Solutions never quotes a price before an in-home inspection; every estimate is written, and it reflects what we actually find in your system, not a generic starting number.
3. Ask About Their Cleaning Process
The process itself should follow a clear order: an inspection first, documentation of what’s found, a written quote based on that inspection, and only then the actual cleaning. Before any work starts, the technicians should protect your floors, furniture, and other parts of the home that aren’t part of the job. Once cleaning is finished, they should clean up after themselves, not leave dust or debris behind for you to deal with. This is what we actually do.
Vague answers like “we clean the whole system” without specifics are a red flag. A real answer sounds more like: negative pressure vacuum connected to the ductwork, EPA-registered sanitizing products, agitation tools matched to your duct material, and individual cleaning of every supply and return vent. These are the tools our team uses, and it’s also the order we follow on every job: inspect, document, quote, protect the home, clean, then clean up.
4. Ask What Equipment They Actually Use
Ask specifically what tools the company brings to the job. Professional duct cleaning requires commercial-grade vacuums that create real negative pressure, along with rotary brushes, air whips, or compressed air tools depending on your duct material, and EPA-registered sanitizing products where appropriate.
A company relying on consumer-grade shop vacuums and small handheld brushes isn’t equipped to reach the full duct system, regardless of what they promise.
5. Check Their Experience and Track Record
Ask how long the company has actually been in business, not just how experienced their technicians claim to be. A company that’s been operating in Charleston for over a decade has a body of completed work you can verify through reviews, references, and their own project history. A company that just started up has none of that yet, which doesn’t automatically make them bad, but it does mean you’re taking more on faith.
Ask for a few references directly if you want more than what’s posted online, and don’t hesitate to ask how many jobs they’ve completed or how long specific technicians have been with the company. A company confident in its track record will answer these questions without hesitation.
6. Ask If They Offer a Guarantee
A company that stands behind its work will offer some form of guarantee or follow-up if something isn’t right after the job. Ask what happens if you’re not satisfied with the results, and get their answer in writing if possible.
Companies unwilling to commit to anything after they’ve been paid are telling you something about how much they trust their own process.
R&E Home Solutions backs its duct cleaning with a 3-year warranty. As an example, if a customer also has our Roof Maintenance service and the same issue repeats within that period, we’ll fix it at no additional cost.
7. Ask for Before-and-After Photos
Photos give you visible proof the job was done thoroughly, not just paperwork saying so. Ask if this is part of their standard service. A company confident in its results usually offers this without being asked twice. You can check out more Before/After images on our homepage.
8. Confirm They Carry Liability Insurance
Duct cleaning involves equipment moving through your home, and accidents happen. Confirm the company carries liability insurance to cover property damage or injury during the job. If they can’t provide proof, you could be on the hook for any damage yourself.
You can also check a company’s complaint history through the Better Business Bureau before hiring, which takes a few minutes and can save a lot of frustration later.
9. Read Actual Reviews, Not Just the Star Rating
Look past the star rating and read a handful of the actual reviews. Specific details, mentions of how technicians handled the home, how communication went, whether the price matched the quote, tell you a lot more than a generic five-star average with no comments attached.
A company with hundreds of reviews built up over years has a track record you can actually verify, not just a claim on a homepage.
10. Make Sure They Actually Service Charleston
It sounds obvious, but it’s worth confirming directly. Some companies advertise broadly across a region without having local technicians, local equipment, or real familiarity with the kind of housing stock common here: older homes downtown, humidity-related ductwork issues, coastal construction. A company based in and genuinely working the Charleston area day to day tends to spot problems specific to this climate faster than one just passing through.
Red Flags That Should Make You Walk Away
A few warning signs show up again and again with companies that cut corners:
- Unrealistically low flat-rate pricing for a whole-house cleaning
- No inspection before quoting a price
- Pressure to add expensive extras once technicians are already inside your home
- Mold claims made without any actual testing
- Reluctance to explain their process when asked directly
None of these guarantee a bad outcome on their own, but a company hitting several of them at once is worth avoiding.
What This Looks Like With R&E Home Solutions
We get asked most of these questions regularly, and we’d rather you ask them than skip straight to booking. R&E Home Solutions has served Charleston for 15 years, holds NADCA member certification, and carries the liability insurance covered in point 8 above. Every job starts with a written estimate and an in-home inspection, not a guess, and we’re glad to walk you through our process, our equipment, and our pricing before you commit to anything.
Here’s how we stack up against the checklist itself:
| What to Check | R&E Home Solutions |
| NADCA certified | Yes |
| Written estimate before work starts | Yes, every job |
| Process explained upfront | Yes, including equipment and containment method |
| Liability insurance | Yes |
| Guarantee on work | Yes |
| Before-and-after photos | Available on our website’s homepage |
| Years in business | 15+ |
| Local to Charleston | Yes, our physical address is 778 Folly Rd d, Charleston, SC 29412 |
If mold is part of what’s driving your decision to look for a duct cleaning company, that’s worth flagging up front too. Our certified mold inspection services in Charleston confirm what’s actually present before anyone recommends treatment, and if testing comes back positive, our professional mold remediation handles removal as its own service. A standard duct cleaning alone won’t resolve an active mold problem, so it’s worth asking any company you’re considering how they’d handle that situation before you book.
