Questions Tenants Ask About Air Filter Changes in Commercial Buildings

When air filters need changing in a commercial building, tenants often want to know what will happen, how long it will take, and whether their space will be affected. Good communication makes the job smoother for everyone, especially in shared buildings where access, timing and responsibilities may not be obvious.

This article answers the most common questions tenants ask about filter changes, while also helping property managers and facility managers plan the work with less disruption.

Who is responsible for filter changes and filter costs?

In many commercial buildings, the responsibility for filter changes depends on the lease, the tenancy fit-out, the building management arrangement and the type of HVAC system in place. Some tenancies are covered under the building owner’s maintenance program, while others place certain costs or servicing responsibilities on the tenant.

The most practical approach is to confirm the arrangement early, before any maintenance is scheduled. If there is uncertainty, check the lease documents and confirm with the building owner, property manager or mechanical services engineer.

It is also worth clarifying whether the site has standard filters, higher-efficiency filters, or specialist filters that are selected for particular plant or conditions. Different filter types can affect cost and replacement method, so it helps to identify exactly what is installed before work is booked.

If you are reviewing an existing setup or planning a change, our products page is a useful starting point for understanding the range of filter types used in commercial systems.

Will the filter change affect tenant access?

In most buildings, filter changes are planned so that access is limited to plant rooms, roof spaces, ceiling voids or other service areas rather than occupied work areas. That said, some systems do require access through tenancy space, especially where air handling units, return air paths or access panels are located inside leased areas.

Tenants usually want to know whether contractors will need to enter their office, workspace, retail area or back-of-house area. Clear notice should explain:

• •which areas need access
• •whether tenants need to unlock doors or move stock, furniture or equipment
• •whether building staff will escort the contractor
• •whether access is needed before or after business hours

If the building has sensitive areas such as server rooms, medical rooms, food preparation areas or secure storage, access arrangements should be discussed well ahead of time. For specialised fit-outs, custom air filters may also be relevant if the system has non-standard dimensions or performance needs.

How much dust or mess should tenants expect?

A filter change should be carried out with care, but tenants may still be concerned about dust when old filters are removed and new ones are installed. That is a fair question, especially in buildings where filters have been collecting fine dust, lint or other airborne particles for a long period.

A well-planned job should include practical dust control measures such as:

• •turning the system off before opening the filter section where required
• •removing used filters carefully and sealing them for disposal
• •avoiding unnecessary disturbance of accumulated dust around the frame or housing
• •cleaning the filter section before fitting new filters
• •checking that the new filters are seated correctly so air bypass is minimised

Tenants can help by keeping the area around access points clear and by raising any special cleanliness requirements beforehand. If the building has ongoing maintenance needs, commercial filter servicing can be a useful option for coordinated scheduling.

It is also sensible to ask whether the contractor will clean up after the work. In most cases, the aim is to leave the area as found, but expectations should be made clear in advance.

Will there be noise during the work?

Yes, there may be some noise, but it is usually limited and short-lived. The main sources are typically access panels being opened, fasteners being removed, filters being handled, and any cleaning that takes place around the filter bank or air handling unit.

For many sites, the bigger question is not whether there will be noise, but when the work will happen. Property managers often try to schedule filter changes outside peak trading periods, outside normal office hours, or during planned maintenance windows. That can reduce disruption for tenants and help building operations run more smoothly.

If the site has noise-sensitive tenants such as call centres, education spaces, consulting rooms or broadcast areas, it is worth advising them in advance. Even a small amount of noise can be disruptive if the timing is wrong.

Will the HVAC system be switched off, and will there be downtime?

Sometimes the system needs to be turned off briefly, but not always. Whether downtime is required depends on the system design, the location of the filters, and the work method used by the contractor.

A tenant will usually want to know:

• •whether air conditioning or ventilation will be affected
• •how long any shutdown is expected to last
• •whether the work can be staged so only part of the system is offline at one time
• •whether there are backup systems or temporary arrangements for critical areas

For buildings that must maintain operation during trading hours, timing and communication are especially important. The filter change should be planned around the building’s operational needs rather than the other way around.

If the building relies on a ventilation system governed by AS 1668.2:2024, the site requirements should be confirmed with the mechanical services engineer or building owner before changes are made.

How do we know when the filters actually need changing?

Tenants sometimes assume filter changes are based on a fixed calendar, but in practice the right timing depends on the system, the site conditions and the dust load. A building near traffic, construction, loading docks or dusty production areas may need more frequent inspection than a low-dust office environment.

The most reliable method is to follow the filter and equipment manufacturer instructions and monitor pressure drop where gauges are fitted. Rising pressure drop can indicate that the filter is loading up and airflow is becoming more restricted.

Useful questions to ask include:

• •Are pressure gauges installed and being checked?
• •Has the site changed recently, such as new building works or a change in occupancy?
• •Are some areas more demanding than others?
• •Is the filter type suited to the actual conditions on site?

If you are unsure how to identify the right size or style of filter for replacement, our guide on how to measure an air filter may help before you place an order.

What about filter type, efficiency ratings and washable options?

Tenants may ask what kind of filter is being used, especially if they notice a change in appearance or if the building has been upgraded. In commercial buildings, filters can be specified by different standards depending on the system and the application.

A few useful points:

• •MERV, EN 779 and ISO 16890 ratings do not convert directly, so avoid assuming one rating means the same thing as another.
• •G3, G4 and F5-F9 are EN 779 classes and are still commonly referenced in Australia, even though ISO 16890 has superseded EN 779.
• •If HEPA filters are relevant to the application, H13 is at least 99.95% efficiency and H14 is at least 99.995% efficiency at the MPPS under EN 1822.
• •Some filters are designed to be washable - check the product instructions before cleaning or reusing them.

If you are reviewing whether a building needs standard HVAC filters, specialist products, or a custom size, it is worth talking through the application rather than choosing by label alone.

Keeping tenants informed makes maintenance easier

The best filter change programs are the ones tenants barely notice, because they have been informed in advance and the work has been planned properly. A simple notice to tenants can explain what is happening, when it will happen, whether access is needed, and who to contact if there is a concern.

For property managers and facility managers, that communication can prevent repeated questions and last-minute delays. For tenants, it provides certainty about noise, access and any short interruption to services.

If your building needs routine coordination, a one-off replacement, or help identifying the right product, filter servicing can be arranged as part of a practical maintenance plan.

Need the right filter for your building?

Total Air Filtration is a family-owned air filter manufacturer and supplier in Hillcrest, Brisbane QLD, and we can help supply or make the right filters for commercial buildings. If you need support with tenant communication, replacements or a non-standard size, call 07 3800 3448 or request a quote.

You can also contact us or browse industries we supply if you want to match the filter solution to your site.