If you’ve searched “duct cleaning Perth prices” you’ve probably seen fixed-price deals - a flat figure per system, booked online, done in an afternoon. Those numbers are real, but they’re for residential ducted aircon. Commercial HVAC is a different scope entirely, and anyone who quotes it sight unseen is guessing.
Here’s an honest breakdown of what shapes the cost of a commercial duct clean, so you can read a quote properly and tell a real one from a cheap one.
Why there’s no sticker price
A commercial system might be a single packaged unit serving one tenancy, or a multi-zone plant with kilometres of ductwork, dozens of diffusers, air-handling units on the roof and variable-air-volume boxes throughout. Those two jobs share a name and nothing else. The only honest way to price the second one is to inspect it first - which is why reputable commercial contractors quote per site, not off a menu.
What actually drives the number
Five things move a commercial duct cleaning quote more than anything else:
- System size and layout - the number of air-handling units, the lineal metres of duct, and how many zones and diffusers are in scope. This is the biggest single driver.
- Access - ducts above hard ceilings, in live wards, over kitchen lines or at height take longer and need more making-good than ducts in an open plant room.
- Contamination level - light dust is a straightforward clean; heavy build-up, microbial growth or post-incident contamination needs containment and source-control treatment, which is more work.
- When the work happens - sites that can’t go offline need night, weekend or staged works around live operations. That costs more than a clear run on an empty building.
- Evidence and verification - a documented clean with before/after imagery, and where required NATA-accredited sampling to verify the result, is a different deliverable to a quick brush-out with no paperwork.
What a proper quote should include
A commercial duct cleaning quote you can rely on will spell out:
- The exact scope - which units, ducts, zones and components are covered, and which aren’t
- The method - containment, HEPA extraction, and any source-control treatment
- The standard it’s delivered to - for HVAC hygiene, that’s AS/NZS 3666.2
- The evidence you’ll receive - before/after imagery, a close-out report, and any sampling results
- How live operations are handled - scheduling, and how your spaces stay usable through the works
If a quote doesn’t cover those, you’re not comparing like with like.
What you’re actually paying for
The cleaning itself is the easy part. What you’re really buying on a commercial job is the proof - a system returned to a defensible baseline, with a documented record you can put in front of an auditor, an insurer or a building owner. That’s the difference between a cost and an expense you have to repeat.
If you want a real number for a real system around Perth, the fastest path is an inspection. Get in touch and we’ll look at what you’ve got, scope it honestly, and quote commercial duct cleaning you can stand behind at audit.