What should ventilation cleaning include?
A clean filter does not tell you whether the ducts are clean. Equally, a dusty cover does not always call for cleaning the entire system. A useful quote identifies the affected parts and the work included.
Separate filters, equipment and ducts
Residential ventilation connects supply and extract vents, ductwork and a ventilation unit. Not every cleaning appointment includes all three. Individual room units, extract-only systems and commercial installations need different access and working methods.
| Component | What to check |
|---|---|
| Grilles and vents | Visible covers only, or the ducts behind them too? |
| Ventilation unit | Housing, fan, heat exchanger and condensate section as applicable |
| Ductwork | Supply, extract, risers, distribution and accessible sections |
| Filters | Correct replacement, materials and fitting |
| Checks | Condition report, photographs and agreed functional checks |
When should the system be assessed?
Dust at vents, unusual smells or reduced airflow justify a check. They do not prove that dirty ducts are the sole cause: blocked filters, moisture or a technical fault may also be involved.
Filter replacement, equipment maintenance, hygiene inspections and complete duct cleaning follow different schedules. Agree intervals based on manufacturer instructions, use and actual findings. A periodic inspection does not automatically require every duct to be cleaned. Following building work, assess any construction dust before further use.
What affects the price?
The number of units and vents, duct access and equipment included matter more than floor area alone. Cleaning an apartment building is not comparable to cleaning one bathroom extractor.
One Swiss manufacturer tariff checked in October 2026 lists CHF 1’450 for air distribution with up to seven vents, plus CHF 160 per additional vent. Its accompanying brochure states that VAT is included. Nine vents therefore calculate to CHF 1’770. This duct-cleaning and documentation package is an individual example, not a market average or a guaranteed offer for other systems.
Check travel, replacement filters, unit cleaning, new access openings and out-of-hours work separately. Repairs and rebalancing airflow are not automatically part of cleaning.
Information that makes quotes comparable
You do not need to remove covers or measure inaccessible ductwork to make an enquiry.
- System and scope. State whether it serves an apartment, house, several homes or a business, and which parts need attention.
- Approximate quantity. Estimate visible vents. For several apartments, give the number of homes; equipment details and plans can follow later.
- Reason. Distinguish routine care, recent building work, smells and reduced airflow.
- Access. Coordinate access with occupants or the business. Agree any difficult equipment access and shutdowns before ordering.
Check the work included and recorded
Ask how dirt will be collected, which sections can be reached and what remains excluded. Obtain an understandable record of the areas treated. A photograph of a clean grille alone does not demonstrate complete duct cleaning.
Covers and filters must be refitted correctly without inadvertently changing vent settings. Establish whether functional checks, airflow measurements or balancing are included. Cleaning does not replace repairs or guarantee health improvements or a particular energy saving.
Kitchen and industrial extraction
Grease-laden kitchen extraction and industrial residues require suitable expertise. Not every residential ventilation cleaner handles these systems. For a kitchen, distinguish the hood, filters, ducts and fan explicitly.
Commercial projects also involve operating hours, production protection and specific hygiene requirements where relevant. Technical servicing, fire safety inspections and hazardous contamination removal require an expressly agreed scope.
Frequently asked questions
Is replacing a filter enough?
It may address a blocked filter, but it does not establish the condition of the unit or ducts. Those require separate assessment where needed.
Do I need to know the brand?
Not for the enquiry. An equipment label or previous maintenance report can help the contractor prepare later.
How often is cleaning needed?
There is no complete-cleaning interval that suits every system. Filters, equipment and ducts are assessed separately using manufacturer instructions, use and inspection findings.
Is a site visit necessary?
A simple, documented system may allow an initial remote estimate. Multiple units, unknown duct routes or difficult access often justify a visit.
Can ventilation run during cleaning?
The affected parts need to be shut down appropriately. The contractor will agree the duration and whether work can be organised in sections.
