Duct cleaning is one of the most heavily marketed services in Brevard County and one of the least often necessary. It is worth being upfront: we do not sell routine duct cleaning. We repair, seal, and rebuild duct systems, and we do remediate contaminated ducts when there is genuine mould or moisture damage. That means this guide costs us a sale more often than it wins one, which is exactly why it is worth reading.
The reason the service is marketed so hard is that it sounds obviously sensible. Air passes through the ducts, so cleaner ducts must mean cleaner air. In practice, the dust that settles inside a duct is largely inert and stays where it is, and the US Environmental Protection Agency's long-standing position is that routine cleaning has not been shown to prevent health problems or improve efficiency. What follows is when it does matter, and what usually matters more in a Melbourne house.
When duct cleaning genuinely is the right call
There are three situations where it is straightforwardly worth doing. The first is visible mould growth on the inside of the duct or on the air handler components, which in Brevard is usually the aftermath of a blocked condensate drain or a roof leak. The second is vermin or insect infestation, which happens more than people like to think in attic duct runs. The third is heavy debris, typically after building work, a renovation, or a storm that let water and dust into the system. In all three cases the point is not the dust, it is that something living or damp is in there.
Why sealing usually beats cleaning in Florida
In most Melbourne homes the ductwork runs through an unconditioned attic that can sit well above 130 degrees in August. When those ducts leak, and older flex duct very often does at the boots, seams, and connections, you are paying to cool air that escapes into the attic while the return side pulls superheated, humid attic air back into the system. It is a double loss and it shows up on the power bill every month. Properly sealing a leaky system can recover a substantial share of the cooling you are already paying for, which is a permanent saving. Cleaning the same ducts changes nothing about that.
The mould question, answered honestly
If you can see mould inside the ducts or the air handler, cleaning alone is the wrong fix, because the mould is a symptom. Something is putting moisture in there, and in Brevard it is nearly always a blocked condensate drain, a badly sealed return pulling humid attic air, or a system so oversized it short-cycles and never dehumidifies the house. Clean it without fixing the cause and it comes back within a season. We address the source first, remediate what is contaminated, and then correct the airflow so it stays gone.
The $79 coupon and how it works
The cheap whole-house duct cleaning advert is a well-known pattern and worth recognising. The advertised price covers a vent count far below what a typical house has, and the visit is structured to find additional problems: mould that needs treatment, a sanitising service, a UV light, or a system that turns out to need replacing. Some of those findings are real. Many are not, and there is rarely any way for a homeowner to tell in the moment. If you are quoted a duct cleaning price under a hundred dollars, ask precisely how many vents it covers and what triggers an upcharge, before anybody is inside the house.
What to ask for instead
If your complaint is high bills, uneven rooms, a house that feels damp, or dust settling faster than it should, ask for a duct inspection and a static pressure test rather than a cleaning. That tells you whether the system is leaking, whether the returns are undersized, and whether the airflow is actually reaching the rooms it is supposed to. It is a diagnosis rather than a product, and it points at the repair that will genuinely change how the house feels.