How to Specify Air Filters for Retail Tenancies and Shopping Centres

Retail centres and retail tenancies place very different demands on air filtration than offices or light commercial sites. Foot traffic is higher, doors open and close constantly, tenancy layouts change, and one part of the building may need odour control while another needs better dust capture. The right filter specification starts with understanding those site conditions, then matching the filter to the system, the tenant mix and the maintenance reality.

Start with how the site actually operates

Before choosing a filter grade, look at how air moves through the property and what the HVAC system is being asked to do. A large shopping centre common area, a food tenancy, a fashion retailer and a loading dock all create different air quality challenges.

Useful questions to ask include:

• •Where are the busiest entrances and exits?
• •Which tenancies produce odours, grease-laden air or fine dust?
• •Are there loading bays, car parks or external doors that allow dust ingress?
• •Are ceiling spaces, corridors and back-of-house areas served by the same system or separate systems?
• •Is the plant designed for standard panel filters, deeper pleats, bag filters or another arrangement?

If you are unsure what is already installed, it helps to identify the filter size and fit before ordering replacements. Our guide on how to measure an air filter can help with the basics.

Match the filter to the tenant type and contaminant load

Shopping centres rarely need one uniform filter specification across the whole site. Mixed-use buildings often perform better when filter selection is set by zone or air-handling unit rather than applying one product everywhere.

Common areas and high foot traffic zones

High pedestrian movement brings in lint, dust, soil and general debris from outside. In these areas, pre-filtration is often useful because it helps capture larger particles before they reach finer downstream filters.

For common areas, consider:

• •A staged filtration approach where the first stage captures larger dust
• •Filters with enough surface area to cope with variable load without creating unnecessary resistance
• •A product choice that aligns with the system fan capacity and the maintenance access available

Where a site has frequent door openings or strong outside air intake, dust load can rise quickly. That makes inspection more important than relying on a fixed replacement schedule. Check pressure drop where gauges are fitted, and follow the filter and equipment manufacturer instructions.

Food tenancies, cafés and odour-prone spaces

Food courts, cafés and takeaway tenants often need more careful planning because odours and grease can spread through shared spaces if the system is not designed for it. Air filters can capture airborne particles, but odour control usually also depends on air handling design, extraction, make-up air and the tenancy fit-out.

For these tenancies:

• •Confirm whether the unit has dedicated exhaust or only shared supply air
• •Use filters that suit the actual contaminant type, not just the tenant category
• •Make sure access for servicing is practical, because greasy or odorous environments can load filters more quickly
• •Check whether the filter arrangement needs to be different for back-of-house and customer-facing areas

If odour control is a persistent issue, speak with the mechanical services engineer or building owner about the overall ventilation strategy. Filters are only one part of the picture.

Fashion, specialty retail and display areas

Retailers selling clothing, cosmetics, electronics or homewares often want cleaner supply air to help reduce visible dust on fixtures and stock. These tenancies may not need the same level of filtration as a food area, but they can still benefit from a more considered specification than a basic low-grade filter.

When specifying for these spaces, think about:

• •Fine dust capture versus airflow resistance
• •Whether the tenant shares return air with other tenancies
• •Whether the retailer has display items or stock that are sensitive to dust build-up
• •Whether the system can handle a finer filter without overloading the fan

Where site managers are comparing product types, our products page is a useful starting point to see the range of filters available.

Consider dust ingress from the building itself

Shopping centres are not just affected by outside air. Dust can also enter from car parks, loading docks, plant rooms, service corridors and incomplete tenant separations. If the building envelope has gaps or the traffic flow is difficult to control, filters can load faster than expected.

Common dust ingress points include:

• •Main entrances and automatic doors
• •Loading dock interfaces
• •Service corridors and back-of-house doors
• •Car park connections to enclosed spaces
• •Tenancy boundaries where one shop has more outdoor exposure than the next

A good specification should take both external and internal dust sources into account. In some cases, a higher-grade final filter may be worthwhile, but only if the system is designed for it. In other cases, improving staging, sealing or maintenance access may deliver a more practical result than simply choosing a finer filter.

Choose a rating that suits the system, not just the brochure

Retail operators often ask for a familiar rating, but filter ratings do not convert neatly across systems. MERV, EN 779 and ISO 16890 are different rating methods and should not be treated as direct equivalents.

In Australia, you may still see EN 779 class references such as G3, G4 and F5 to F9, even though ISO 16890 is now widely used. The important point is to specify performance in a way that matches the HVAC design and the building’s needs, rather than assuming one naming system tells the whole story.

If the project involves a higher-efficiency filter, make sure the mechanical services engineer or building owner confirms the site requirements. For ventilation design matters, reference should be made to AS 1668.2:2024 and the broader building context.

When HEPA is relevant

HEPA filters are not common across standard retail tenancy supply air systems, but they may be used in particular applications where very fine particle capture is required and the system is designed for it.

If HEPA is being considered, note the standard definitions:

• •H13 is at least 99.95% efficiency at the most penetrating particle size under EN 1822
• •H14 is at least 99.995% efficiency at the most penetrating particle size under EN 1822

These filters are specialised products and should only be specified where the plant, energy use, airflow and maintenance access all suit that level of resistance.

Plan for maintenance access and replacement practicality

The best filter specification on paper can still be awkward in a real shopping centre if maintenance access is poor. Ceiling spaces, locked plant rooms, long service corridors and busy trading hours all affect how easy it is to inspect and change filters.

A practical specification should consider:

• •How filters are accessed without disrupting tenants unnecessarily
• •Whether replacement can be done safely in confined spaces
• •Whether the site has enough room for deeper or higher-capacity filters
• •Whether a standardised size can be used across several units to simplify stocking

Some filters are designed to be washable, but that depends on the specific product. Always check the product instructions before assuming a filter can be cleaned and reused.

If your team handles ongoing upkeep, filter servicing and commercial filter servicing resources can help support a better maintenance plan.

Build a specification that suits tenants and the building owner

In mixed-use retail sites, the right filter is rarely just about one tenancy. It needs to work for the building owner, the property manager, the facility team and the tenants whose trading conditions can change over time.

A well-structured specification should:

• •Identify the system serving each zone
• •State the dust, odour and airflow challenges for that zone
• •Match filter performance to the actual plant capacity
• •Leave room for future tenancy changes or fit-out works
• •Include inspection and monitoring expectations, especially where pressure gauges are installed

Where the tenancy mix is changing, it is worth reviewing whether the existing filter arrangement still suits the site. A new café, a change in loading patterns or a more open entry layout can all alter the filtration load.

Talk to Total Air Filtration about the right fit

Total Air Filtration is a family-owned air filter manufacturer and supplier in Hillcrest, Brisbane QLD, and we work with retail sites, shopping centres and mixed-use buildings to supply filters that suit the application. If you need help choosing standard sizes, custom dimensions or a site-specific setup, custom air filters may be the best option.

For practical advice or to request support with your next specification, call 07 3800 3448 or request a quote. You can also contact us if you need help working through the requirements for a retail tenancy or centre-wide system.