Filter Options for Licensed Venues With Late-Night Odour Complaints

Late-night venues can be difficult places to manage for odour because the air is rarely dealing with just one source. Kitchens, bars, patron traffic, cleaning products and smoking areas can all contribute at once, and complaints often point to a ventilation system that needs a closer look rather than a single quick fix.

For venue operators, landlords and facility managers, the practical question is not whether air movement exists, but whether the system is capturing the right contaminants, moving air in the right direction and using filters that suit the real conditions on site.

Why odour complaints are harder in licensed venues

Licensed venues often operate with changing loads across the night. A system that seems adequate in quieter periods can struggle once the venue fills, doors open and close repeatedly, and kitchen and bar activity increases.

Odour problems in these settings usually come from a mix of sources:

• •Cooking fumes, grease and fine airborne particles from kitchens
• •Alcohol vapours and general patron-generated odours in bars and function areas
• •Smoke or vapour from designated smoking areas drifting towards entry points, courtyards or adjoining tenancies
• •Cleaning chemicals used after service
• •Poorly balanced exhaust and supply air, which can cause odours to migrate instead of being controlled

A filter alone will not solve every odour complaint. But the right filtration stages, together with correct ventilation design and maintenance, can make a noticeable difference to how air moves through the building.

Start by separating the odour problem by source

Before choosing a filter, it helps to identify where the complaint is coming from. A kitchen exhaust system, a bar area and an outdoor smoking zone may all need different approaches.

Kitchen exhaust

Kitchen systems usually need filtration that can deal with grease and airborne cooking residue before air is discharged or recirculated. If filters load up too quickly, airflow drops and odours can linger around hoods, ducts and nearby outdoor areas.

Depending on the system, common options include:

• •Grease filters suited to commercial kitchen exhaust hoods
• •Pre-filters to capture larger airborne particles before finer stages
• •Carbon or activated carbon filters where odour adsorption is part of the system design

The exact arrangement should match the equipment and the airflow path. In some setups, the main issue is not the filter type itself, but poor capture at the hood or excessive build-up in the ductwork.

Bar and dining areas

Bars and dining rooms usually need filtration that supports indoor air quality and helps reduce the spread of airborne dust, lint and fine particles that can carry lingering smells. In these areas, the goal is often to keep the air fresher for longer while avoiding pressure problems that can affect comfort.

If the HVAC system is recirculating air, filter selection should balance particle capture with airflow resistance. A filter that is too restrictive for the system can reduce supply air volume and create uneven conditions across the venue.

Smoking areas and outdoor interfaces

Where smoking is permitted in a designated area, the challenge is often controlling drift rather than treating the smoke after it has spread. This usually calls for careful placement of extraction, make-up air and any filtration stages used in the exhaust path.

If the smoking area is near entries, courtyards, loading zones or neighbouring premises, it is worth reviewing whether the discharge point, fan arrangement or filtration path needs adjustment.

Practical filter options to consider

The right choice depends on whether the system is handling exhaust air, recirculated supply air, or both. In many venues, more than one filter type is used in sequence.

Pre-filters

Pre-filters are commonly used to catch larger particles before they reach finer filters or sensitive equipment. In a venue environment, they can help reduce build-up from dust, lint and general airborne debris.

Pre-filters are often a good starting point where maintenance access is straightforward and the site sees heavy evening traffic. They can also help protect more specialised filters downstream.

Fine particle filters

Where a supply air system is filtering recirculated air, finer filters may be used to capture smaller airborne particles. These filters are selected to suit the fan capacity, the required airflow and the pressure limits of the system.

It is important not to assume that a higher-rated filter is automatically better for every venue. If the system was not designed for that resistance, it may reduce airflow and create new comfort or performance issues.

EN 779 classes such as G3, G4 and F5 to F9 are still widely used in Australia, although ISO 16890 has now superseded that standard in many applications. MERV, EN 779 and ISO 16890 do not convert directly, so product selection should be based on the actual rating and the system requirements rather than a rough conversion table.

Activated carbon filters

For odour control, activated carbon filters are often used where adsorption of odour-causing compounds is needed. They can be useful in kitchens, bars, smoking-related air paths and other areas where the main complaint is smell rather than dust alone.

Carbon filters are not a universal fix. They need the right contact time, air velocity and system design to work effectively. If the air moves too quickly through the filter, or the wrong type of contaminant is present, performance may be limited.

HEPA where it is actually needed

HEPA filtration is not the default answer for licensed venues, but it can be relevant in particular applications where very fine particle capture is required. If a HEPA-grade filter is specified, it is important to match the product to the system and understand the classification.

For reference, H13 filters are at least 99.95% efficient at the most penetrating particle size under EN 1822, and H14 filters are at least 99.995% efficient at MPPS under the same standard. These are specialised filters and should only be used where the system is designed for them.

Design and maintenance matter as much as the filter

Even a good filter will not solve an odour complaint if the rest of the system is poorly set up. Pressure balance, duct condition, fan performance and access for servicing all affect the result.

A few practical checks are worth making:

• •Confirm whether the issue is in supply, exhaust or both
• •Check that dampers, fans and hoods are operating as intended
• •Inspect ducts for grease accumulation, damage or leakage
• •Review whether odours are being pulled towards entrances, outdoor seating or neighbouring sites
• •Check pressure drop where gauges are fitted, and compare it with the filter or equipment manufacturer instructions

Inspection frequency depends on the system, site conditions and dust load. High occupancy, kitchen use and smoke exposure can all increase the need for closer monitoring. Follow the filter and equipment manufacturer instructions rather than relying on a fixed schedule.

If some filters are designed to be washable, check the product instructions before cleaning or reusing them. Not every filter can be washed safely or effectively.

When to upgrade the filter setup

A filter upgrade may be worth considering when complaints continue despite routine maintenance, or when the venue has changed use since the original system was installed.

Typical triggers include:

• •A new kitchen tenancy or a menu change that increases grease load
• •Expansion of trading hours or patron numbers
• •Added smoking or vaping zones near air intakes or public entry points
• •Ongoing odour transfer to adjoining tenancies
• •Filters clogging faster than expected or pressure drop rising quickly

If the building is being reviewed under ventilation requirements, AS 1668.2:2024 may be relevant. Site requirements should be confirmed with the mechanical services engineer or building owner before changing the filtration setup.

For custom dimensions, non-standard housings or difficult-to-match frames, custom air filters may be the most practical option. If you are comparing replacement choices, our products can help you identify the right filter type for the system.

Getting the dimensions right

A common cause of poor filtration performance is a filter that does not fit the frame properly. Even a small gap can let air bypass the media and reduce the value of the filter.

If you are replacing an existing filter, measure carefully before ordering. If the frame is unusual, damaged or no longer matches standard sizes, it is worth checking how to measure an air filter before making a decision.

For venues with ongoing maintenance needs, commercial filter servicing and filter servicing can also help keep the system in working order.

Talk to Total Air Filtration

Total Air Filtration is a family-owned air filter manufacturer and supplier in Hillcrest, Brisbane QLD, established 2009. We can help supply standard filters or make the right filters for your venue, kitchen exhaust or HVAC setup.

If you are dealing with late-night odour complaints and need practical advice on filter options, call 07 3800 3448 or request a quote. You can also contact us or view the industries we supply.