Alliance Comfort Services

Duct cleaning in Raleigh, NC

Most houses do not need it. That is not our opinion, it is the position of the EPA's own guidance for homeowners, and it is worth saying before anything else on a page about duct cleaning in Raleigh, NC. There are three real reasons to do it and we will tell you honestly whether you have one.

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What the EPA actually says

The United States Environmental Protection Agency publishes guidance for homeowners on exactly this question. Its position is that air ducts should not be cleaned routinely, only as needed, and that knowledge in this area is early enough that no blanket recommendation can be made either way.

It then names the conditions that do warrant it. These are those three, in plain words.

  • Visible mold inside the ducts

    Substantial visible growth on the inside of hard-surface ducts, or on other parts of the system. The EPA is specific that much of a duct system cannot be inspected by eye, so anybody who says there is mold should be able to show it to you.

  • Vermin have been in there

    Evidence of rodents or insects actually living in the ductwork. This one usually announces itself by smell before anybody looks, and cleaning is the smaller half of the job. Whatever let them in has to be closed.

  • Real debris, actually coming out

    Ducts clogged with substantial deposits of dust or debris, with particles visibly being released into the room through the registers. Not a dusty house. Debris coming out of the vents.

If none of those three describes your house, you probably do not need this. A dusty house is usually a filter, a return that is pulling air from somewhere it should not, or simply a house with people and pets in it. We would rather tell you that on the phone than sell you a duct cleaning.

Describe what you are seeing or smelling and you will get a straight answer about whether it is worth anybody coming out.

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How to tell whether you are being sold one

This category has a reputation and it earned it. The pattern is a very low advertised price for a whole house, followed by a technician who finds something once he is inside, and a number that has grown by the time the work is agreed.

Three questions make that difficult to do. Ask what the advertised price actually includes, and how many vents. Ask to be shown anything they say they found, because the EPA's guidance makes the same point: much of a duct system cannot be inspected by eye, so a claim about mold should come with something to look at. And ask what happens if they find nothing, because a job that cannot end in "you do not need this" was never an inspection.

Ask us the same three. That is the point of writing them down.

What actually moves the air in a Triangle house

Humidity, mostly. This is a hot, humid transition climate and controlling moisture is a real comfort issue here rather than an upsell. A house that feels stuffy and smells musty in August is usually telling you about its humidity, not about its ducts.

After that it is filtration and what the filter is actually rated to catch, whether the return side is pulling air from a crawlspace or an attic it should not be, and whether the duct system leaks. Those are covered on indoor air quality in Raleigh.

If the duct system itself is the problem rather than what is inside it, undersized runs and leaks into a crawlspace are worked through on AC installation and replacement, and a room the ducts never reached at all may be a ductless mini-split.

If you do need it, what the job is

The supply and return runs and the trunk lines get cleaned mechanically, with the system's own components protected and any access openings sealed and re-insulated afterwards so the ductwork is left airtight. Carpet and furnishings are covered before anything starts.

Nothing is sprayed into the ducts as a matter of routine. Alliance Comfort Services LLC is licensed in North Carolina, number L.34059, and the licensed contractor who tells you whether you need this is the one who would do it.

The questions worth asking anybody

Does duct cleaning improve my health or my allergies?
There is no good evidence that it does, and we are not going to tell you otherwise. The EPA states that duct cleaning has never been shown to actually prevent health problems. If somebody is selling it to you on that basis, that is the moment to be careful. There are things that genuinely affect the air in a Triangle house, and humidity is the big one.
How often should ducts be cleaned?
On no schedule at all. The EPA does not recommend routine cleaning, only cleaning as needed, and "as needed" means one of three specific conditions is present. A company that recommends it every few years by default is selling a subscription rather than answering a question.
Somebody offered me a whole-house duct cleaning for a very low price. Is that normal?
It is common and it is worth being careful with. A very low advertised price for a whole system rarely covers the work a real job takes, and the usual pattern is that the number grows once somebody is in the house. Ask what is included, ask to see anything they say they found, and ask what happens if they find nothing.
Should the ducts be sprayed with anything afterwards?
The EPA is cautious about chemical biocides and sealants applied inside ductwork, and so are we. We do not spray anything into a duct system as a matter of routine, and if somebody proposes it, ask what it is and what evidence there is that it helps.

What customers say

5.0 out of 5, from 25 reviews on Google

Read all 25 on Google

Think something is actually in your ducts?

Tell us what you are seeing, smelling or hearing and you will get an honest answer, including the answer that nothing needs doing. Everything we cover in Raleigh is on one page.

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