Air Filtration for Physio Clinics with Open Treatment Bays

Open treatment bays ask a lot from an air filtration setup. You need enough airflow for the system to work as intended, low noise so the space stays calm, and filters that are practical for staff to inspect and replace without disrupting the clinic.

For physio clinic owners, facility managers and contractors, the goal is not to overcomplicate the system. It is to choose filters that suit the mechanical design, the building conditions and the way the clinic is actually used.

Start with the space, not the filter label

Open-plan physiotherapy areas are different from enclosed consulting rooms. Air moves through the whole bay, people are in and out all day, and treatment equipment, floor finishes and foot traffic can all affect dust load.

Before selecting a filter, think about:

• •how the supply and return air are arranged
• •whether the space is part of a larger tenancy or a standalone fitout
• •whether the system serves one area or several connected rooms
• •whether the clinic sits near road dust, construction activity or other local sources of particulate matter
• •whether noise from the air handling system is already a concern

A filter that is too restrictive can make a system work harder than intended, while a filter that is too coarse may not suit the site conditions. The right choice sits in the middle: enough particle capture for the application, while maintaining usable airflow and manageable pressure drop.

If you are unsure where to begin, how to measure an air filter is a useful first step before ordering replacements or asking for a custom size.

Match filter performance to the ventilation design

Open treatment bays often rely on a balanced ventilation design to keep air movement even across the room. That means the filter selection should be considered alongside fan capacity, duct layout, grille placement and the expected resistance of the whole system.

In many Australian commercial systems, you may still hear references to G3, G4 or F5-F9 classes. These are EN 779 classes that are still widely used in Australia, even though ISO 16890 is now the current standard family. MERV, EN 779 and ISO 16890 do not convert directly, so avoid treating them as interchangeable.

A practical approach is to ask:

• •what the mechanical services engineer specified, if anything
• •what the equipment manufacturer allows in terms of resistance and filter type
• •whether pre-filters and final filters are used together
• •whether the existing system has enough spare fan capacity for a higher-resistance filter

If the clinic is a new fitout or major refresh, confirm site requirements with the mechanical services engineer or building owner, and check AS 1668.2:2024 where it applies to the ventilation design.

Choose filters that support low noise and steady airflow

Noise matters in physiotherapy settings. Open bays depend on a calm atmosphere, and filter choice can influence how hard the fan has to work, which can affect system noise.

When specifying filters, keep the following in mind:

• •A denser filter may capture more particles, but it can also increase resistance if it is not suited to the system.
• •A larger filter face area can help reduce air velocity through the media, which may support quieter operation.
• •A staged setup with a pre-filter and a final filter can sometimes be a better fit than forcing one filter to do all the work.
• •If the existing system already sits close to its limits, the safer option may be a filter specification that maintains airflow rather than pushing for a heavier grade without checking the fan curve.

For clinics that are particularly sensitive to noise, the filter conversation should happen alongside the mechanical design conversation. Airflow, acoustics and filtration are linked, and it is worth treating them as one decision rather than separate tasks.

Make maintenance simple for busy clinics

A good filter specification is one that the clinic can live with over time. In open treatment bays, maintenance access is often just as important as performance.

Look for features that make day-to-day management easier:

• •standard sizes where possible, so replacements are straightforward
• •clear access panels and safe working space for technicians
• •filters that can be changed without disturbing treatment rooms more than necessary
• •frames and sealing that suit the existing filter rack and reduce bypass risk
• •product instructions that clearly explain installation, handling and disposal

Inspection frequency depends on the system, site conditions and dust load. Follow the filter and equipment manufacturer instructions, and monitor pressure drop where gauges are fitted. That gives a better picture of when a filter needs attention than relying on a fixed calendar.

Some filters are designed to be washable - check the product instructions before assuming that applies to a particular unit. In many commercial settings, replacement filters are the simpler and more predictable option, but the right answer depends on the actual product and application.

If you need ongoing support, filter servicing and commercial filter servicing can help keep the system organised without adding unnecessary admin.

Common specification questions for physio clinics

Should the filter grade be higher than a standard office fitout?

Not automatically. The right grade depends on the HVAC design, the local environment and the level of resistance the system can handle. A filter that looks better on paper is not necessarily better for the installed equipment.

What if the clinic has dust from nearby works or heavy street exposure?

That may justify a more robust staged arrangement, better sealing, or a filter product with a different media structure. Local conditions matter, especially in areas with ongoing dust generation.

Can the clinic use custom sizes?

Yes. Custom sizes are often the practical answer when the existing frame is non-standard or the original equipment is no longer easily matched. custom air filters can be a good option when off-the-shelf dimensions do not suit the plant.

What if the team wants the simplest possible ordering process?

Keep a clear record of the filter dimensions, media type, frame style and any installation notes. If you are measuring an existing filter, use a reliable method and confirm the dimensions before ordering. our products is a helpful place to review common options before you request a replacement.

Plan for the clinic you actually run

Open treatment bays need a filter strategy that fits real operations: people moving through the room, staff needing simple maintenance, and a ventilation system that still performs quietly and consistently.

Total Air Filtration is a family-owned air filter manufacturer and supplier based in Hillcrest, Brisbane, and we work with commercial spaces like physio clinics across Australia. If you need help choosing the right filter or having one made to suit an existing frame, we can assist.

Call 07 3800 3448 or request a quote. You can also contact us or browse industries we supply for more information.