Duct cleaning has a reputation problem in New Jersey, and it is deserved. The pattern is familiar: an advertised number so low it cannot possibly cover a day of work, a crew that arrives and discovers problems, and a final figure several times what was quoted on the phone.
You cannot judge a quote by its number. You can judge it by what it describes.
The scope has to be written down
A quote worth trusting says what is being cleaned. At minimum it should name:
- how many supply runs and return runs are included
- whether the supply and return plenums are included
- whether the blower compartment is included
- whether the evaporator coil is included
- whether registers and grilles are removed and washed
- whether a filter is supplied
If the quote is one line and one number, you have no way to tell what you are buying, and neither does the crew that turns up. That ambiguity is where the second conversation on your kitchen floor comes from.
The method should be described, not implied
Ask one question: how is the system put under negative pressure?
There is a correct answer to this. The ductwork gets connected to a high-volume vacuum and sealed, so the whole tree pulls toward the machine before anything is agitated. If the answer is vague, or involves a shop vacuum held at each register, the dust you are paying to remove is going to end up in the room rather than in the truck.
The second question is what agitates the duct. Rotary brushes and compressed-air whips do the work. Suction alone does not lift a bonded dust layer off sheet metal.
The number should not depend on what is found
A trustworthy quote is arrived at after somebody has counted the system, and it does not move because the technician saw something on the day. Ours works that way for a straightforward reason: we would rather spend twenty minutes counting supplies and returns than have an argument in your hallway.
There is one honest exception. If a crew genuinely finds something outside the scope, such as a disconnected branch, a coil past cleaning, or growth that needs a different remediation approach, the right behaviour is to stop, show you the photograph, and let you decide. That is different from a discovery that always happens and always costs the same.
Watch for scope that quietly excludes the expensive parts
The coil and the blower wheel are the two components that decide whether you notice a difference, and they are also the two that take time. A quote that covers “all vents” while saying nothing about the air handler is a quote for the easy half of the job.
This is the most common way a cheap number is made to work. Nothing about it is a lie. It simply leaves out the parts that matter.
Ask what evidence you will get
Duct cleaning happens inside walls. The only way you can verify it is photographs of the same duct before and after. Any crew doing the work properly already has a camera out, because they need the photos themselves to show you what they found.
If a company cannot produce before-and-after images, you are being asked to accept invisible work on trust. We put ours in front of every customer, and seven of our reviews mention them without being prompted.
Confirm licence and insurance
New Jersey home improvement contractors are registered, and the registration number is not a secret. Ours is 13VH12103100. Ask for the number, and ask whether the company carries insurance, before anyone is inside your house with a ladder.
The questions that sort it out in one phone call
- What exactly is included: runs, plenums, blower, coil, registers?
- How do you put the system under negative pressure?
- How long will it take on a house like mine?
- Will I get before-and-after photos of the inside of the duct?
- What is your New Jersey contractor registration number?
- Under what circumstances would the price change?
Six questions. A company doing the work properly answers all six without hesitating, because they are describing what they do every day.
The uncomfortable part
Sometimes the honest answer is that you do not need this service yet. A three-year-old house with no pets, no renovation and a filter that gets changed is not a candidate, and being told so is a good sign about whoever told you.
When you do need it, the version of the job described here is the one worth paying for, and the questions above will tell you within a phone call whether that is what is on offer.
