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Duct cleaning - quotes
The lowest duct cleaning quote wins a lot of jobs. It also hides a lot of costs - the sections it never reaches, the certificate it cannot produce, and the second clean you end up paying for.
The short answer
A too-cheap duct cleaning quote is usually cheap for a reason: it covers only the easy, accessible parts, skips fitting access where the run is sealed, and produces no measured certificate. The hidden cost is what that leaves behind - unreached ductwork carrying the fire risk, no evidence for your insurer, and often a second, proper clean to put it right. The low number is a smaller job, not a better deal.
Where the saving comes from
A duct clean can be made cheap the same way any job can - by doing less of it. The quick version cleans what is easy to reach and leaves the concealed runs, the risers and the fan, because reaching those takes time, access and equipment. The result can look like a clean while covering a fraction of the system.
That is the first hidden cost: you are not comparing two prices for the same job, you are comparing a whole-system clean with a partial one that happens to share a name. The cheaper quote is cheaper because it is smaller, and the difference is exactly the concealed ductwork where the grease and the fire risk actually sit.
Hidden cost one
A cheap quote almost never includes fitting access panels. Where ductwork runs sealed through ceilings and risers, there is no way in without cutting compliant access - and doing that costs money the low quote has left out. So the sealed sections simply are not cleaned, and the quote quietly assumes they do not need to be.
The cost of that shows up later as a system that has never been fully cleaned, with the grease building in the parts nobody reached. Sooner or later the access has to be fitted and the whole run cleaned properly - so skipping it does not remove the cost, it defers and usually increases it.
Hidden cost two
The cheapest cleans rarely produce a proper certificate - no grease readings, no photographs, no schedule of what was done. That absence matters because the certificate is what your insurer and fire risk assessor rely on. A clean you cannot evidence is, for compliance purposes, close to a clean that did not happen.
So the hidden cost is exposure. If a fire follows and you cannot show the system was cleaned and certificated as your policy required, the claim can be reduced or refused - a loss vastly larger than the few pounds saved on the quote. The missing certificate is the most expensive thing a cheap clean leaves out.
Hidden cost three
Put the first two together and the common outcome is paying twice. The partial clean does not satisfy an insurer, a fire risk assessor or an incoming operator, so at some point a proper contractor is brought in to fit access, clean the whole system and certificate it - the job that should have been done first. The cheap clean becomes the first of two bills, not a saving.
Add the disruption of a second visit and any consequences in between, and the too-cheap quote reliably works out dearer than paying once for the full job. The apparent bargain is a down-payment on doing it again.
Spotting it
A genuine duct cleaning quote gives itself away in the detail. It states what proportion of the system will be reached, includes fitting access where the run is sealed, and promises a measured certificate with readings and photographs. A too-cheap one is a single low number with no mention of access, no measurement and no certificate.
Two questions usually settle it: how much of the system will you actually reach and measure, and what certificate will I get. A contractor describing a whole-system clean answers plainly; one relying on the gaps to look cheap gets vague. Judged on scope rather than headline, the honest quote is nearly always the cheaper decision over time.
Questions
Because it is usually cheap for doing less - cleaning only the accessible parts, skipping access panels for sealed runs, and producing no certificate. The hidden cost is unreached ductwork, no evidence for your insurer, and often a second proper clean.
Typically the concealed ductwork, risers and fan; fitting access where the run is sealed; and a measured certificate with readings and photographs - the parts that take time and prove the work.
Because your insurer and fire risk assessor rely on it. A clean you cannot evidence is close to a clean that did not happen - and after a fire, a claim can be reduced or refused for want of it.
Often, yes. A partial clean that does not satisfy an insurer or assessor usually means a proper contractor is brought in later to fit access, clean the whole system and certificate it - so the cheap clean becomes the first of two bills.
It states what proportion of the system will be reached, includes access where sealed, and promises a measured certificate. A too-cheap one is a low number with no mention of access, measurement or certificate.
How much of the system will be reached and measured, and what certificate you will get. Plain answers describe a whole-system clean; vague ones often rely on the gaps to look cheap.
We quote the whole system, access and certificate included, so the price you compare is for the job that protects you.
