Filter Selection for Museum Conservation Stores and Back-of-House Areas

Museum stores, preparation areas and conservation labs all share a common challenge: keeping dust, fibres and other airborne particles away from collections, tools and work surfaces. In these spaces, filter selection is not just a maintenance task; it is part of protecting artefacts, supporting careful handling and helping preserve a controlled environment.

The right filter arrangement depends on how the room is used, the condition of the existing HVAC system and the level of airborne contamination from nearby activity, storage materials and foot traffic. A good starting point is to match the filter to the space, then confirm the details with the mechanical services engineer or building owner, especially where AS 1668.2:2024 and site-specific requirements apply.

Why dust control matters in conservation spaces

Museum back-of-house areas are often busy even when they are not open to the public. Boxes are moved, packing materials are opened, shelving is adjusted and objects are examined or repacked. Each of these activities can disturb settled dust and introduce new particles into the air.

That matters because dust can settle on artefacts, housing materials, benches and equipment. It can also make cleaning more difficult and increase the likelihood of repeated disturbance in spaces that need to stay calm and organised.

Common back-of-house areas that benefit from careful filtration include:

• •collection stores
• •quarantine and unpacking spaces
• •object preparation rooms
• •conservation laboratories
• •photography and documentation rooms
• •loading-adjacent work areas

A practical filtration strategy helps reduce the amount of airborne material entering these spaces through the mechanical system. It also supports a cleaner working environment for staff who handle sensitive items and process archival materials.

Understanding what the filter needs to do

Not every room in a museum needs the same level of filtration. The best choice depends on the role of the space and the amount of dust generated inside and around it.

Storage rooms

In storage rooms, the priority is usually steady dust control with minimal disruption to airflow and system performance. Filters should capture the particles most likely to settle on shelving, packaging and artefacts while still allowing the air-handling system to operate as intended.

For many general storage areas, a staged approach can work well, with a pre-filter capturing larger particles before a finer filter handles the smaller ones. This can help extend the useful life of the finer filter, depending on the site conditions and the dust load.

Preparation spaces

Preparation rooms often see more packaging dust, fibres and disturbed debris than stores. If the space is used for unpacking or surface cleaning, a more effective final filter may be appropriate, provided the system is designed for it.

Where the system is upgraded, check fan capacity, filter framing and seals. A finer filter is only useful if air can still move through the system without excessive bypass or pressure issues.

Conservation labs

Conservation labs can require the most considered approach, particularly where delicate surfaces, adhesives, pigments or paper-based materials are involved. The goal is not simply to filter more aggressively, but to create stable, clean air conditions that suit the work being done.

If a lab includes local extraction or specialised equipment, the general room filtration should be coordinated with those systems rather than treated separately.

Choosing the right filter type and rating

For museum applications, filter selection should start with the room’s contamination risk and the capabilities of the system already in place. Common commercial and institutional filter grades may be described using EN 779 classes such as G3, G4 and F5 to F9, although EN 779 has been superseded by ISO 16890. In Australia, these older class names are still widely used in the market.

You may also see ISO 16890 classifications, which do not convert directly from MERV or EN 779. Because the rating systems are not interchangeable, it is better to compare actual product data and intended application rather than try to use a simple conversion.

When a higher-efficiency final filter is needed, HEPA may be relevant in some conservation environments. Under EN 1822, H13 is at least 99.95% efficient and H14 is at least 99.995% efficient at the most penetrating particle size. Whether that level is suitable depends on the room function, the system design and the broader building strategy.

Useful questions to ask before choosing a filter include:

• •What particles are most likely to be present in the room?
• •Is the system handling outside air, recirculated air or both?
• •Can the fan and housings handle the pressure drop of a finer filter?
• •Is the filter intended as a pre-filter, final filter or part of a staged setup?
• •Are there access and maintenance constraints in the ceiling plant or equipment room?

For facilities planning a new fit-out or upgrade, it can help to review our products alongside the room’s airflow and access requirements.

Practical details that make a difference

Seal quality and bypass control

A high-grade filter will not perform well if air can pass around it. Frames, gaskets and housings should suit the filter size and installation method. In museum settings, careful fitting matters because even small bypass gaps can allow dust-laden air into the supply stream.

If you are ordering replacements, accurate dimensions are essential. If you are unsure how to measure, use how to measure an air filter before ordering or request help from the supplier.

Dust loading and access

Museum back-of-house spaces can be awkward to service. Some filters are easier to inspect and replace than others, especially where access panels are tight or plant rooms are shared. The inspection frequency depends on the system, site conditions and dust load, and should follow the filter and equipment manufacturer instructions. Where gauges are fitted, monitor pressure drop so replacement can be timed to actual condition rather than guesswork.

Washable options

Some filters are designed to be washable - check the product instructions. This can be useful in certain applications, but washable construction is a product-specific feature and not a general rule. In conservation settings, it is important to confirm that the filter is suitable for the intended duty before choosing it.

Coordinating filtration with the broader museum environment

Filters are only one part of dust control. Good housekeeping, careful material handling and appropriate room pressure relationships all matter. If nearby renovations, loading activity or storage movement create extra dust, the filtration strategy may need to be adjusted to suit the changed conditions.

It is also worth considering how the museum uses each space through the day. A room that is quiet most of the time may still experience short bursts of dust when crates arrive, packing is opened or cleaning occurs. Those moments can influence what level of filtration is sensible.

For larger facilities, a practical filtration plan often includes:

• •a pre-filter stage where appropriate
• •a finer final filter matched to the room use
• •regular visual checks of seals and frames
• •pressure drop monitoring where gauges are installed
• •clear access for servicing and replacement
• •alignment with building maintenance procedures and conservation protocols

If the facility is being upgraded or the existing setup is underperforming, filter servicing and commercial filter servicing may be relevant alongside replacement planning.

Getting the specification right

The best filter choice is the one that fits the room, the system and the conservation task without creating unwanted airflow problems. That means thinking beyond the label and checking the actual installation details: frame size, available space, fan capacity, seal quality and the type of dust the room is likely to generate.

If the project involves a custom size, special frame or a non-standard application, custom air filters may be the right path. For more general planning across a museum or heritage site, industries we supply can help you see where similar filter solutions are used.

Talk to Total Air Filtration

Total Air Filtration is a family-owned air filter manufacturer and supplier based in Hillcrest, Brisbane QLD, and we work with museums, contractors and facility teams on practical filtration solutions.

If you need help selecting filters for museum stores, preparation rooms or conservation spaces, contact us on 07 3800 3448 or request a quote.