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Surelock Features
Filter Usage and Housing Weight
A. Standing flange for duct connection
B. Spring loaded swing-arm filter clamping assembly
A
A
B
C
D
E
F
B
A. 14 ga. galvanized steel construction
B. 1-1/2 in. easy-grip UV-resistant
knobs on positive-pressure
adjustable door latches
C. Hinged/removable doors
D. Optional 2 in. pre-filter tracks
E. All metal joints welded
F. Filter sealing surface
(1) Filters/Weight: Top letter/number combination indicates the number of and nominal face size of filters required
to fill the unit. “A” stands for nominal 24” x 24” filter. “C stands for nominal 24” x 12” filter. Bottom number indi-
cates the approximate weight of the housing EMPTY. Add approximately 32 lb per 24 in. x 24 in. filter and 15 lb
per 24 in. x 12 in. filter plus 2 lb per prefilter to determine approximate weight when loaded with filters.
• Standard housing depth is 12”
Height Filters
Code Weight Width Code
(lb) 10W 15W 20W 25W 30W 35W 40W 45W 50W 55W 60W
05H Filters 1C -- 2C -- 3C - 4C -- -- -- --
Weight 110 140 160 180
10H Filters 1A 1A-1C 2A 2A-1C 3A 3A-1C 4A 4A-1C 5A 5A-1C 6A
Weight 165 205 240 275 300 332 360 385 408 465 510
15H Filters 1A-1C -- 2A-2C -- 3A-3C -- 4A-4C -- 5A-5C -- 6A-6C
Weight 185 250 310 390 450 560
20H Filters 2A 2A-2C 4A 4A-2C 6A 6A-2C 8A 8A-2C 10A 10A-2C 12A
Weight 215 250 267 318 350 395 410 446 475 546 615
25H Filters 2A-1C -- 4A-2C -- 6A-3C -- 8A-4C -- 10A-5C -- 12A-6C
Weight 225 318 370 500 565 712
30H Filters 3A 3A-3C 6A 6A-3C 9A 9A-3C 12A 12A-3C 15A 15A-3C 18A
Weight 270 312 350 392 435 470 506 545 585 600 742
35H Filters 3A-1C -- 6A-2C -- 9A-3C -- 12A-4C -- 15A-5C -- 18A-6C
Weight 282 385 470 612 765 945
40H Filters 4A 4A-4C 8A 8A-4C 12A 12A-4C 16A 16A-4C 20A 20A-4C 24A
Weight 340 392 446 502 555 612 670 758 845 922 985
Flanders Filters - Foremost in Air Filtration
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