Model Number
Nominal Size
Exact Size
Case Qty
Initial Resistance 300 fpm
CFM Capacities 300 fpm
1-1010-F
10x10x1
9 1/2x9 1/2x3/4
12
0.05
208
1-1020-F
10x20x1
9 1/2x19 1/2x3/4
417
1-1220-F
12x20x1
11 1/2x19 1/2x3/4
500
1-1420-F
14x20x1
13 1/2x19 1/2x3/4
583
1-1425-F
14x25x1
13 1/2x24 1/2x3/4
729
1-1520-F
15x20x1
14 1/2x19 1/2x3/4
625
1-1620-F
16x20x1
15 1/2x19 1/2x3/4
667
1-1625-F
16x25x1
15 1/2x24 1/2x3/4
833
1-1824-F
18x24x1
17 3/8x23 3/8x3/4
900
1-2020-F
20x20x1
19 1/2x19 1/2x3/4
1-2024-F
20x24x1
19 3/8x23 3/8x3/4
1000
1-2025-F
20x25x1
19 1/2x24 1/2x3/4
1042
1-2030-F
20x30x1
19 1/2x29 1/2x3/4
1250
1-2424-F
24x24x1
23 3/8x23 3/8x3/4
1200
1-2525-F
25x25x1
24 1/2x24 1/2x3/4
1302
2-1020-F
10x20x2
9 1/2x19 1/2x1 3/4
0.08
2-1224-F
12x24x2
11 3/8x23 3/8x1 3/4
600
2-1420-F
14x20x2
13 1/2x19 1/2x1 3/4
584
2-1425-F
14x25x2
13 1/2x24 1/2x1 3/4
730
2-1520-F
15x20x2
14 1/2x19 1/2x1 3/4
2-1620-F
16x20x2
15 1/2x19 1/2x1 3/4
2-1624-F
16x24x2
15 3/8x23 3/8x1 3/4
800
2-1625-F
16x25x2
15 1/2x24 1/2x1 3/4
834
2-1824-F
18x24x2
17 3/8x23 3/8x1 3/4
2-2020-F
20x20x2
19 1/2x19 1/2x1 3/4
2-2024-F
20x24x2
19 3/8x23 3/8x1 3/4
2-2025-F
20x25x2
19 1/2x24 1/2x1 3/4
2-2424-F
24x24x2
23 3/8x23 3/8x1 3/4
2-2525-F
25x25x2
24 1/2x24 1/2x1 3/4