Application guide for Commercial Permanent Metal Air Filter to ASHRAE 52.2 / UL 900. The core duty of the type is pre-filtering air in commercial and industrial air handlers with rigid, washable metal filters that stay in service for years instead of being thrown away. The typical industries, the how-to-specify checklist, handling practice and the exclusion cases are set out below.
Typical Applications for Commercial Permanent Metal Air Filter
Where Commercial Permanent Metal Air Filter is specified and bought:
- Commercial HVAC: air-handler pre-filters in offices, schools and hospitals.
- Industrial plants: make-up air units in dusty or oily environments.
- Commercial kitchens: grease pre-filters on make-up air.
- Paint & finishing booths: intake pre-filters.
How to Specify Commercial Permanent Metal Air Filter for Your Application
- Size: Nominal 20 × 20, 24 × 24 or 20 × 25 in at 2 in or 4 in depth.
- Media: Layered aluminum for weight; SS430 or galvanized for heat and abrasion.
- Frame: Galvanized steel or stainless with handles for frequent removal.
- Standard: Quote ASHRAE 52.2 / UL 900 and the size designation from the table on the product page, plus any value you changed in the technical drawing.
Handling & Installation Practice
- Wash with water and mild detergent, then re-spray filter adhesive where the design calls for it.
- Keep a spare set so the unit never runs unfiltered during cleaning.
Common Selection Mistakes with Commercial Permanent Metal Air Filter
- Using a metal pre-filter as the final filter.
- Re-installing filters wet, which carries water onto the coil.
Where Commercial Permanent Metal Air Filter Is Not the Right Choice
Not a HEPA or MERV 13 filter; it protects equipment, not occupants.
