Vent, Duct and Furnace Cleaning.Three Different Jobs

Somebody knocks offering “duct cleaning”, or a search for it returns results that plainly are not the same service, and it is genuinely hard to tell what is being sold. Three separate jobs hide under similar names. They use different equipment, they solve different problems, and paying for the wrong one is the usual outcome of not knowing the difference.

One: the dryer vent

A single duct serving a single appliance, running from the back of the dryer to a hood on an outside wall or a roof. It carries hot wet air and lint, and it is the only duct in the house that a household appliance actively pushes anything into.

What it develops is lint: settling at bends, at joints and at the cold end, and as it accumulates the dryer takes longer and runs hotter. It is a safety job as much as a performance one, because lint is combustible and a restricted duct traps heat against it.

The work is a brush on a rod driven the length of the run with vacuum extraction at one end. That is appliance work — the machine comes out, the hose comes off, and on a proper job the lint packed inside the dryer is cleared at the same time. This is the one Kodiak does.

Two: the furnace and its ductwork

An entirely different system. Every supply register in every room, every cold-air return, the trunk lines and the plenum, all connected back to the furnace. Not one duct — the building’s circulatory system.

What accumulates in it is not lint. It is construction dust, drywall residue, dander and years of ordinary household dust, and the reason to clean it is usually air quality or a recent renovation rather than a failing appliance.

The equipment differs in kind rather than degree: a truck-mounted vacuum putting the whole system under negative pressure while agitation tools work each branch. That is an HVAC contractor’s trade, with its own certifications, and it is a bigger machine than fits in an appliance van.

Three: bathroom and kitchen exhaust

The quiet third one. A bathroom fan and a range hood each push air out through their own duct, and both collect — damp dust in the bathroom, grease in the kitchen.

A bathroom fan that no longer clears the mirror usually has a duct problem rather than a fan problem, and a range hood duct heavy with grease is its own fire question. Neither is a dryer vent and neither is furnace ductwork, which is exactly why they get forgotten by everybody.

So which one do you need?

Work backwards from the symptom rather than forwards from the word.

• Clothes coming out damp, or the laundry room hot. Dryer vent. Nothing else produces that.
• Dust back on the furniture a day after cleaning, or fluff at the registers. Furnace ductwork.
• You have just finished a renovation. Furnace ductwork — and worth doing once the dust has settled rather than during the work.
• The bathroom mirror stays fogged, or kitchen smells linger. Exhaust ducts, and usually just the one.
• Somebody knocked on the door with a whole-house special. Ask which of the three they mean and what equipment arrives. The answer tells you a great deal.

Why the confusion costs money

The phrase “duct cleaning” gets used for all three, and the cheapest advertised version is rarely the one that solves a dryer problem. A crew set up for furnace ductwork is equipped for the building rather than the appliance — and half of a dryer vent job is inside the machine.

It runs the other way too. If the registers are furring up and the dryer is fine, an appliance technician is not the person with the right truck.

The useful question when you are quoted for any of them is simply which ducts, and what comes apart to reach them? The three answers are not remotely similar, so the reply tells you immediately which job you are buying.

Three trades, three problems, one overloaded phrase. Start from what the house is actually doing wrong and the right one picks itself.