Pocket-style filters built with synthetic, depth-loading media. Available in standard and extra‑durable constructions,
with options for multiple pocket counts, depths, and rigid pocket variants. Designs emphasize low resistance,
high dust-holding capacity, and even loading across the pockets.
Key Characteristics
- MERV options typically include 11–15 (by model and build).
- Moisture‑resistant synthetic media; does not support microbial growth.
- Optional features: welded media, pocket separators/bands, adhesives over stitch lines, and gasketing.
- Typical recommended final resistance: 1.0" w.g. (models vary).
- Common temperature rating: up to 150 °F for pocket types; up to 70 °C for rigid pocket types.
Standard Synthetic Pocket (Ultrasonic‑Welded)
Synthetic media with layered melt‑blown polypropylene and a non‑shed backing. Pockets are formed by a
patented ultrasonic welding process (no stitch holes), with ribbon separators to promote uniform airflow and
loading across each pocket.
| Depth |
Pockets |
MERV 12 Initial (" w.g. @ 500 fpm) |
MERV 13 Initial (" w.g. @ 500 fpm) |
MERV 15 Initial (" w.g. @ 500 fpm) |
Final (" w.g.) |
| 12" | 6 / 8 | 0.45 / 0.39 | 0.62 / 0.54 | 0.98 / 0.80 | 1.0 |
| 15" | 6 / 8 | 0.42 / 0.36 | 0.52 / 0.42 | 0.72 / 0.58 | 1.0 |
| 22" | 6 / 8 | 0.33 / 0.29 | 0.35 / 0.32 | 0.49 / 0.43 | 1.0 |
| 29" | 6 / 8 | 0.31 / 0.26 | 0.34 / 0.29 | 0.41 / 0.33 | 1.0 |
| 36" | 6 / 8 | 0.37 / 0.28 | 0.41 / 0.34 | 0.45 / 0.36 | 1.0 |
Extra‑Durable Synthetic Pocket
Heavy, durable synthetic media with robust stitching and adhesive‑sealed stitch lines for high‑abuse applications.
Designed to resist tearing and remain functional across the filter life; suitable for high humidity environments.
| Depth |
Pockets |
MERV 11 Initial (" w.g.) 500 fpm |
MERV 15 Initial (" w.g.) 500 fpm |
Final (" w.g.) |
| 19" | 8 / 10 | 0.25 / 0.20 | 0.35 / 0.30 | 1.0 |
| 26" | 6 / 8 / 10 | 0.21 / 0.17 / 0.23 | 0.30 / 0.23 / 0.39 | 1.0 |
Rigid Synthetic Pocket (Selected Types)
Rigid pocket variants use self‑supporting welded pockets with injection‑molded or PU headers. Progressive‑density
synthetic media provides high dust‑holding capacity and low pressure drop. Suitable for high humidity and
turbulent airstreams.
| Type |
Nominal Class |
Rated Air Flow (1/1) |
Initial ΔP at Rated Flow |
Recommended Final ΔP |
ISO 16890 (example) |
| Rigid Pocket (PQL) | F7 (EN 779) | 3400 m³/h | 150 Pa | 450–600 Pa | ePM2.5 70% |
| Rigid Pocket (PTL) | M6 (EN 779) | 3400 m³/h | 55–70 Pa | 450–600 Pa | ePM10 60% |