HVAC Air Filters
Fine Filter
The intermediate stage, F5 to F9, that catches what a pre filter misses and a HEPA should not have to.

Manufactured in standard and customised sizes.
About Fine Filter
Fine filters capture the smaller particulate that gets past a pre filter: bacteria, mould spores, fine dust and other allergens. They are suitable for use as filter grades F5 to F9 of EN779 and MERV 8 to 15 of ASHRAE 52.
In a cleanroom train they are the second stage, protecting the final HEPA. In commercial and healthcare buildings they are frequently the last stage, and are what determines the air quality occupants actually experience.
Technical parameters
Performance
| Efficiency | 97% at 3 micron, 97% at 5 micron |
|---|---|
| Initial pressure drop | 3 mm WC |
| Final pressure drop | 18 mm WC |
| Grades | F5 to F9 (EN779), MERV 8 to 15 (ASHRAE 52) |
| Washable | Yes |
Construction
| Type | Box type / flange type |
|---|---|
| Casing | Extruded aluminium profile / GI / SS 304 / SS 316 |
| Media | Synthetic media with HDPE net, non-woven |
| Support rod | 5 mm solid aluminium rod |
| Sealant | Polyurethane |
| Gasket | Neoprene or silicone |
Standard sizes
- 305 x 305 x 25 / 50 / 150 mm
- 610 x 305 x 25 / 50 / 150 mm
- 610 x 610 x 25 / 50 / 150 mm
- 915 x 610 x 25 / 50 / 150 mm
- 915 x 760 x 25 / 50 / 150 mm
- 915 x 915 x 25 / 50 / 150 mm
- 1220 x 610 x 25 / 50 / 150 mm
- 1220 x 915 x 25 / 50 / 150 mm
5 mm thick gasket on all sides. Custom sizes manufactured to order.
Who it is for
- Pharmaceutical and BiotechnologyCleanrooms, containment equipment and filtration for drug manufacturing, formulation and biotech research.
- Chemical Research LaboratoriesFume containment, biosafety cabinets and gas phase filtration for laboratories handling volatile compounds.
- Electronics ManufacturingParticle control and laminar flow work stations for electronics assembly and test.
- Semiconductor ProductionThe most demanding filtration case, where bypass leakage matters as much as media efficiency.
- Food ProcessingHygienic design and filtration for food production, where cleaning regimes are as demanding as the air.
Related products
Pre FilterThe washable first stage that catches coarse dust so the expensive filters downstream last longer.
Absolute HEPA FilterH13 and H14 grade final filtration, 99.97% at 0.3 micron, for ISO Class 5 operation.
Bag FilterThe same extended surface principle in bag form, for high dust load air streams.
Enquire about Fine Filter
Send the size, quantity and duty and we will come back with a specification and a price.
- Useful to include
- For filters: size, quantity, required grade and frame material. For a project: the room layout and the ISO class it has to hold.
- Or reach us directly
- +91 89560 50201+91 89560 50209marketing@mapfil.com
- Corporate office
- Office No 809, 8th Floor, Kamdhenu 23 West, Kopar Khairane, Mahape, TTC Industrial Area, Navi Mumbai, Maharashtra 400705