How to Compare Quotes for Custom Cut-to-Size Filter Pads

When you request custom cut-to-size filter pads, the lowest headline price is not always the best value. A quote can look cheaper simply because the pad is thinner, uses a lighter media, includes a different cut size, or is priced on a different pack quantity.

For facility managers, the key is to compare like with like so the pads suit the equipment, fit correctly, and perform as expected in service.

Start by confirming the exact size you need

The first thing to check is whether each quote is based on the same finished dimensions. A small difference in length, width, or thickness can make one quote look lower even though it is not actually comparable.

Before you compare pricing, confirm:

• •the required length and width
• •the finished thickness of the pad
• •whether dimensions are quoted as cut size or nominal size
• •whether the pad is supplied as a single piece, sheet, or pack
• •whether trimming tolerance is included in the quoted size

If you are measuring for a replacement, it is worth reviewing how to measure an air filter before placing the order. Accurate measurements help avoid gaps, bypass, and unnecessary rework.

If you are unsure whether the pad size is correct for your unit, check the equipment manual or speak with the mechanical services engineer or building owner. Site requirements can vary, particularly where the filters sit inside a larger air handling system.

Compare thickness first, not just price

Thickness affects how the pad fits the frame and how much media is actually present in the filter. Two quotes may both say “cut-to-size filter pad”, but if one is thicker than the other, the material cost and the service outcome may be very different.

Ask each supplier whether the quoted thickness is:

• •the actual finished thickness after cutting
• •a compressed or nominal thickness
• •the thickness of the media only, or the full pad including backing or support layers

For some applications, a thinner pad may fit the frame more easily, but that does not automatically mean it is the best choice. The right thickness depends on the housing, the available space, the air velocity, and the way the filter is retained in the equipment.

If your current filter pad is folding, bowing, or bypassing around the edges, the issue may be fit rather than price. In those cases, it can help to discuss the frame and seal arrangement before ordering a replacement.

Check the media specification carefully

The media is the part of the filter that captures particles, so the material itself matters. A quote should clearly state what media is being used, not just call it a “pad”.

Useful details to look for include:

• •fibre type or media construction
• •whether the pad is synthetic, glass fibre, or another material
• •whether it is a single-layer or multi-layer product
• •whether the pad is dry, tackified, or otherwise treated
• •whether it is designed for one-sided or two-sided airflow, if relevant

If two quotes have the same dimensions but different media, they are not equivalent products. A lighter media may be suitable for one system, while a denser or more robust media may be better for another. The right choice depends on the equipment design, dust load, and the pressure conditions in the system.

Some filters are designed to be washable - check the product instructions if that is important for your site. Do not assume washability from the product name alone.

If your site uses higher-performance filters in other stages of the system, keep the terminology clear. MERV, EN 779 and ISO 16890 do not convert directly, so avoid relying on a simple conversion when comparing products. EN 779 classes such as G3/G4/F5-F9 are still widely used in Australia, even though the standard has been superseded by ISO 16890.

Make sure the quote includes the same quantity basis

Quantity can change the headline price more than many buyers expect. One supplier may quote per pad, another per pack, and another may include a minimum order quantity or batch pricing.

When reviewing quantity, ask:

• •is the price per item or for the full order
• •does the quote assume a single custom cut size or multiple sizes
• •are there setup charges, cutting charges, or handling charges
• •does the price change if you order more than one pad size at once
• •are spare pads included or priced separately

For facilities with multiple air handling units, it can be useful to group pad sizes into one order where practical. That can simplify receiving and storage, but only if the dimensions and media are still correct for each unit.

If you manage several sites, you may also want to compare ordering against your broader maintenance plan. Our filter servicing and commercial filter servicing pages explain how we support ongoing filter supply for different site types.

Look beyond the unit price

A cheaper unit price can become more expensive if the pads do not fit properly, need to be reordered, or create extra labour during installation. When comparing quotes, think about the full job, not only the sticker price.

Points that often matter in practice include:

• •whether the cut size matches the frame without excessive trimming on site
• •whether the media is suitable for the expected dust load
• •whether the supplier can repeat the same specification consistently
• •whether packing protects the pads from damage during transport
• •whether lead time suits your maintenance schedule

A clear quote should tell you exactly what you are buying. If it does not, ask for the details in writing before approving the order. That makes it easier to compare options fairly and avoids confusion when the pads arrive.

For sites operating under ventilation requirements, it is sensible to confirm the filter specification against AS 1668.2:2024 where relevant, and with the mechanical services engineer or building owner as needed. That is especially important when the filter pad is part of a larger conditioned-air system.

Ask for the same details from every supplier

The easiest way to compare quotes is to request the same information from each supplier from the start. That creates a like-for-like comparison and reduces the chance of hidden differences.

A good request should include:

• •exact finished dimensions
• •required thickness
• •preferred media type or performance requirement
• •quantity needed
• •any frame, backing, or special cut requirements
• •the site or equipment name so the supplier understands the application

If you are unsure how to describe the filter you need, our custom air filters page can help you outline the specification before you send the request. You can also contact us if you want to talk through the details first.

How Total Air Filtration can help

Total Air Filtration is a family-owned air filter manufacturer and supplier in Hillcrest, Brisbane QLD, established 2009. We can help you compare specifications properly and supply or make the right custom cut-to-size filter pads for your site.

If you would like assistance with a replacement order or a new custom size, call 07 3800 3448 or request a quote.

We also supply products across a range of sites and sectors, which you can explore on our products and industries we supply.