What Buyers Should Ask About Filters for Exhaust-Heavy Commercial Tenancies

Retail, food and service tenancies can place very different demands on a building’s ventilation system. Mixed odours, airborne particles and continuous exhaust from kitchens, salons, workshops and customer areas can all affect how a tenancy feels day to day.

If you are leasing, managing or fitting out an exhaust-heavy commercial space, the right questions about filters can save confusion later. They can also help you match the filter arrangement to the tenancy, the building and the equipment already in place.

Why exhaust-heavy tenancies need closer filter planning

A standard office-style filter setup may not suit a tenancy with cooking odours, hair and beauty products, cleaning chemicals, dust from light fabrication, or a steady stream of outside air being drawn through the system.

In these spaces, filters may need to handle more than just visible dust. They can also play a role in capturing airborne particles before they move through the air handling equipment, build up on components, or circulate back into occupied areas.

Buyers should look at the whole ventilation picture, not just the filter itself. That includes:

• •the type of tenancy activity
• •how much outdoor air is brought in
• •whether the system runs for long periods or continuously
• •where odours and exhaust air are being extracted
• •whether the space uses recirculated air, fresh air intake, or both
• •the physical size and arrangement of the filter section

If you are unsure what the current system is designed to do, ask the building owner or the mechanical services engineer before changing filter type or grade.

Questions buyers should ask before signing or fitting out

What contaminants are likely in the space?

Different tenancies create different filter challenges. A café, takeaway, barber, nail salon, convenience store and service workshop can all release different particles and odours into the air.

Ask what is actually entering the system:

• •grease or oily vapour
• •fine dust from preparation or cleaning
• •lint, hair or fibres
• •general outdoor dust drawn in through make-up air
• •odour-laden air from adjoining tenancies or shared areas

This helps determine whether the system needs coarse pre-filtration, finer filtration, odour-focused media, or a combination of stages.

What type of filter is already specified?

Not every filter type is interchangeable. The existing system may have been set up around a particular size, resistance level and filter class.

Before ordering replacements, check:

• •the frame dimensions and depth
• •the mounting arrangement
• •the filter class or grade currently used
• •whether the equipment is designed for one stage or multiple stages of filtration
• •whether the system can handle a higher pressure drop if a different filter is chosen

If you are not sure how to measure correctly, see how to measure an air filter.

Is odour control part of the brief?

Standard particulate filters capture dust and other airborne particles, but they do not automatically solve odour issues. In a mixed-use tenancy, odour control may require a dedicated solution as well as particle filtration.

Buyers should ask whether the system includes any media or stage intended to address odours, and whether that suits the tenancy type. In some cases, the answer may involve changes to the air path, the exhaust arrangement, or the filter media rather than simply choosing a higher-grade dust filter.

Practical filter features that matter in these tenancies

Pressure drop and airflow resistance

A filter that is too restrictive for the system can affect airflow balance and increase strain on equipment. This is especially important where fans run for long periods or where exhaust systems are already working hard.

Ask the supplier or mechanical services engineer to confirm:

• •the expected operating resistance of the filter
• •whether the fan and housing are suitable for that resistance
• •whether the system has pressure gauges or other monitoring points fitted

Where gauges are fitted, monitor pressure drop and use it as one of the indicators for inspection and replacement decisions. Inspection frequency depends on the system, site conditions and dust load, and you should also follow the filter and equipment manufacturer instructions.

Filter depth, media and holding capacity

Spaces with steady dust or odour loading often benefit from filters with the right media construction and dust-holding capacity for the job. In practical terms, this can affect how often the system needs attention, how stable airflow remains, and how much dirt builds up in the housing.

Useful questions include:

• •Is the filter meant for light, moderate or heavy loading?
• •Does the tenancy need a pre-filter as well as a final filter?
• •Will the filter be easy to inspect and replace without disrupting trading?

Washability and maintenance access

Some filters are designed to be washable - check the product instructions. That can be useful in certain applications, but it is not a feature to assume from appearance alone.

Also ask how easy it is to access the filter section. In a busy retail or service tenancy, a filter that is difficult to reach may be ignored until airflow drops or odour complaints become harder to manage.

Standards, system fit and what should be confirmed

Ventilation and filtration choices in commercial tenancies should be aligned with the building design and any relevant site requirements. If AS 1668.2:2024 is relevant to the premises, confirm the detail with the mechanical services engineer or building owner rather than assuming the existing setup is correct.

It is also worth knowing that filter ratings do not all translate directly between systems and standards. MERV, EN 779 and ISO 16890 are not direct conversion systems, so avoid comparing products on a simple one-to-one basis.

If you are reviewing legacy specifications, you may still come across EN 779 class references such as G3, G4 or F5 to F9. These are older class names that are still widely used in Australia, even though ISO 16890 has superseded EN 779.

If the project calls for HEPA filtration, make sure the performance class is clear. Under EN 1822, H13 is at least 99.95% efficiency and H14 is at least 99.995% at the most penetrating particle size. That is not the same as every other high-efficiency label, so the exact product specification matters.

A better buying checklist for property managers and tenants

When you are comparing filter options for an exhaust-heavy tenancy, use the tenancy itself as the starting point.

Ask:

• •What activity is happening in the space?
• •What is the main air issue: dust, grease, lint, odour, or a mix?
• •Is the filter intended for supply air, return air, exhaust air, or a pre-filter stage?
• •Does the current equipment suit the filter size and resistance?
• •Are replacement filters easy to source and fit correctly?
• •Is there a servicing plan for checking condition and pressure drop?

If the premises involve retail food, hospitality, salons or service trades, it can also help to review the broader product options available for different housings and applications. See our products or industries we supply for a useful starting point.

Getting the right filter advice for your tenancy

The best filter choice for an exhaust-heavy commercial tenancy depends on the system, the site and the type of work being done in the space. A good supplier should help you match the filter to the housing, airflow and maintenance needs rather than forcing a one-size-fits-all answer.

Total Air Filtration is a family-owned air filter manufacturer and supplier in Hillcrest, Brisbane QLD, established 2009. We can supply or make the right filters for retail, food and service tenancies, including custom sizes where needed.

For advice or to discuss a replacement, call 07 3800 3448 or request a quote. If you need help with ongoing maintenance, see filter servicing or commercial filter servicing.