Custom-Size Air Filters Guide
Order a custom-size air filter whenever your system doesn't use a standard off-the-shelf size, you have an older or imported unit, or you need a specific MERV, depth, or frame. Custom filters are built to your exact actual dimensions for a tight, bypass-free seal — available in any MERV rating from pleated to HEPA.
When you need a custom filter
- Your filter size isn't sold in stores.
- Older, imported, or commercial equipment with non-standard slots.
- You want a higher MERV or deeper media than the stock filter.
- OEM replacement for industrial or specialty units.
- High-temperature, washable, or chemical-resistant requirements.
How to order
Measure the actual length, width, and depth of your existing filter or slot, choose your efficiency (MERV 8 to HEPA), and specify the frame type. Modern Air Filtration manufactures custom and OEM-replacement filters in Canada to your exact specification, including pleated, rigid cell, pocket, carbon, and HEPA constructions.
Frequently Asked Questions
Are custom filters more expensive?
Custom filters cost a little more than mass-produced standard sizes, but the difference is small and the exact fit prevents air bypass that undermines a too-small standard filter. For non-standard systems, custom is the correct choice.
What's the largest custom filter you can make?
We build filters across the full range of residential, commercial, and industrial sizes, including large air-handler and OEM panels. Contact us with your dimensions for anything outside standard ranges.
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Need help choosing the right filter?
Talk to our Canadian air filtration team. Call 1-888-973-3635 or request a quote.