How to Review HVAC Filter Requirements in a Building Handover Pack

When a building changes hands, the HVAC handover pack can be one of the most useful documents in the room, but only if you know what to look for. Filter requirements are often buried among commissioning notes, drawings and equipment schedules, so it pays to review them carefully before your next service visit or tenant fitout.

For facility managers, building owners and contractors, the goal is simple: confirm what filters are installed, what the system was designed to use, and what still needs to be verified on site. That way, you can avoid mismatches, missing information and unnecessary downtime.

Start with the documents that describe the air system

The handover pack should include enough detail to show how the air handling system was designed and commissioned. Start with the sections that identify the equipment and the filter stages.

Look for:

• •mechanical services drawings
• •equipment schedules
• •commissioning documents
• •operations and maintenance manuals
• •filter datasheets or product schedules
• •spare parts lists
• •as-built drawings
• •maintenance handover notes

These documents may not all say the same thing in the same way. A drawing might show the filter housing type, while the manual lists the filter media grade or dimensions. If anything conflicts, mark it for follow-up with the installer or the mechanical services engineer.

If the pack is incomplete, it is worth asking for the missing information early. A clean record now makes future ordering much easier, especially when you need filter servicing or want to match existing equipment with our products.

Check the filter specification against the actual equipment

The most important thing to confirm is whether the filter specified in the paperwork is the same as the filter that can actually fit the installed housing. A good handover pack should identify the size, depth, frame type and rating of each filter stage.

Review the following points:

• •filter dimensions, including length, width and depth
• •frame material and construction
• •number of filter stages in the system
• •airflow direction through the filter bank
• •seal type and access arrangement
• •any pre-filter and final filter combination
• •bag filter, panel filter, pleated filter or rigid cell format
• •whether the filter is disposable or, where stated, washable

If the documents mention a filter size but do not show the physical dimensions, measure the installed unit before reordering. If you are unsure how to record the measurements correctly, use how to measure an air filter as a guide.

Do not assume the nominal size printed in the schedule is the same as the exact fitting size. In practice, the dimensions of the housing and the filter frame need to match properly for the filter to seat, seal and operate as intended.

Confirm the rating system used in the paperwork

Handover packs often use more than one filter rating system, especially where equipment has been selected over different project stages or by different suppliers. It is important to note which standard is being used rather than trying to convert one rating into another by guesswork.

You may see references to:

• •MERV ratings
• •EN 779 classes such as G3, G4 or F5 to F9
• •ISO 16890 classifications
• •HEPA grades under EN 1822

These systems do not convert directly, so avoid assuming that one label means the same thing as another. G3/G4/F5-F9 are EN 779 classes and are still widely used in Australia, even though EN 779 has been superseded by ISO 16890. If a document uses older terminology, that does not automatically make it wrong, but it does mean you should confirm the intended replacement specification before ordering.

Where HEPA filters are specified, check the exact grade. Under EN 1822, H13 is at least 99.95% efficient at the most penetrating particle size, and H14 is at least 99.995% efficient at MPPS. Only use those figures where the handover documentation genuinely calls for HEPA filtration.

If the building is subject to a ventilation design requirement, confirm the site expectation with the mechanical services engineer or building owner, including any relevant reference to AS 1668.2:2024.

Check what matters beyond the rating

A filter rating alone is not enough to manage a building properly. The handover pack should also show the operating details that determine whether the system will be practical to maintain.

Pay attention to:

• •initial pressure drop and recommended terminal pressure drop
• •the location of pressure gauges or differential pressure monitoring points
• •access clearance for changing filters
• •whether the housing has gaskets, clamps or other sealing hardware
• •if the system has by-pass risk during changeout
• •whether the installation allows filters to be fitted in the correct airflow direction
• •any notes about dust load, process contamination or site conditions

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. If the site is dusty, has unusual occupancy patterns or operates for long hours, the servicing plan may need closer review than a standard office setup.

Also check whether the pack identifies any filters as washable. Some filters are designed to be washable, but that depends on the specific product. Always check the product instructions before cleaning or reusing anything.

Verify the installation details before you accept the handover

This is where many problems are caught. The paperwork may look complete, but the real test is whether the installed filter arrangement matches the documents and can be maintained without difficulty.

Ask the installer to confirm:

• •the exact product codes supplied
• •the installed filter counts and stages
• •the orientation of each filter bank
• •the access method for replacement
• •any spare filters handed over with the building
• •the location of pressure monitoring points
• •whether any substitutions were made during construction
• •which documents should be treated as the final reference set

If a substitute filter was used because the original was unavailable, ask for the reason in writing and confirm that the replacement suits the housing and airflow conditions. Never rely on a verbal handover alone.

It is also worth checking whether the installed filter matches the maintenance approach described in the O&M manual. If the building operator needs to source replacements later, the documentation should be clear enough that someone new to the site can order the correct item without guesswork.

For facilities that need ongoing support, commercial filter servicing can help keep the handover information aligned with what is actually installed.

Build a simple handover checklist for future use

Once you have reviewed the pack, create a short internal record that captures the essentials. This does not need to be complicated, but it should be easy to find and update.

Include:

• •equipment name and location
• •filter stage and rating
• •exact dimensions and frame type
• •supplier or product code
• •notes on access and orientation
• •pressure monitoring details
• •any special handling or sealing notes
• •unresolved items to confirm with the installer

Keeping this information together helps with maintenance planning, spare parts ordering and contractor briefings. It is also useful when managing multiple tenancies or buildings, where different air systems may use different filter formats.

If the building uses specialised filtration or has non-standard housings, it may be worth exploring custom air filters so future replacements match the installation properly.

When to call for help

If the handover pack is unclear, incomplete or inconsistent, do not wait until the filters need changing to sort it out. The earlier you confirm the specification, the easier it is to avoid ordering the wrong product or fitting a filter that does not seal correctly.

Total Air Filtration is a family-owned air filter manufacturer and supplier based in Hillcrest, Brisbane QLD, and we can help you review the paperwork, identify the right filter type, or make the filters needed for your system. Call 07 3800 3448 or request a quote when you need support with a new handover, replacement filters or a difficult-to-match size.