Note: All Smith Permanent stock sizes are 1/2″ under on width and height, 1/8″ under on thickness.
Multiple layers of expanded aluminum, enclosed in a heavy weight aluminum frame. Designed for air applications such as make up air roof top units in industrial, commercial, schools, office buildings, hospital, and hotels where a medium weight washable filter is recommended. They can also be used as pre filters, which would remove large particles that easily clog a filter. Pre filters keep the main filter lasting longer and the unit running more smoothly.
CONSTRUCTION: The Lifetime Filter is a medium weight aluminum filter. It consists of multiple layers of aluminum expanded material, assembled in alternating layers to assure maximum filtering and internal loading capabilities. The media is enclosed in a heavyweight aluminum frame, mitered and secured at one corner by rivets. The filter is designed for applications such as industrial, commercial, schools, office buildings, hospitals, and hotels where a medium weight permanent filter is recommended. Maximum temperature range on the Lifetime Filter is 250 degrees F. Available in both stock and special sizes. Available in 3” and 4” thicknesses.
MATERIAL: Filtering element shall be processed from sheet Aluminum, commercially known as 3003-H22, .025 in thickness expanded with .050 strand. Frame shall be made from sheet Aluminum 3003-H14, .040 thickness.
| STOCK SIZE (Actual Size 1/2″ under) | STOCK # | Pack Ctn/ Lbs. Ctn |
| 16 x 20 x 1 | LT16201N | 12 /30 lbs. |
| 16 x 25 x 1 | LT16251N | 12 /36 lbs. |
| 20 x 20 x 1 | LT20201N | 12 /36 lbs. |
| 20 x 25 x 1 | LT20251N | 12 /45 lbs. |
| 24 x 24 x 1 | LT24241N | 12 /51 lbs. |
| 10 x 20 x 2 | LT10202N | 12 /24 lbs. |
| 12 x 24 x 2 | LT12242N | 12 /34 lbs. |
| 16 x 20 x 2 | LT16202N | 12 /38 lbs. |
| 16 x 25 x 2 | LT16252N | 12 /43 lbs. |
| 20 x 20 x 2 | LT20202N | 12 /43 lbs. |
| 20 x 25 x 2 | LT20252N | 12 /57 lbs. |
| 24 x 24 x 2 | LT24242N | 12 /65 lbs. |
| Net Face Velocity F.P.M. | Resistance in Inches of W.G. nominal thickness | C.F.M. Capacity by Size | ||||||
| 1 Inch | 2 Inch | 10×20 | 16×20 | 16×25 | 20×20 | 20×25 | 24×24 | |
| 267 | 0.041 | 0.032 | 282 | 467 | 597 | 600 | 768 | 897 |
| 356 | 0.072 | 0.061 | 376 | 623 | 796 | 800 | 1024 | 1197 |
| 445 | 0.120 | 0.090 | 469 | 779 | 995 | 1000 | 1279 | 1496 |
| 533 | 0.180 | 0.137 | 562 | 933 | 1192 | 1200 | 1532 | 1791 |
| 622 | 0.256 | 0.200 | 656 | 1089 | 1391 | 1400 | 1788 | 2091 |
| 711 | 0.329 | 0.263 | 750 | 1244 | 1590 | 1600 | 2044 | 2390 |
| 800 | 0.410 | 0.340 | 844 | 1400 | 1789 | 1800 | 2300 | 2689 |
| 889 | 0.413 | 938 | 1556 | 1988 | 2000 | 2556 | 2988 | |
| 978 | 0.510 | 1032 | 1712 | 2187 | 2200 | 2812 | 3287 | |
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