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TABLE 21A.
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PREVENTS - ALUMINUM HONEYCOMB AIR VENT PANELS
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| OVERALL DIMENSIONS |
EFFECTIVE AIR FLOW AREA |
FRAME DIMENSIONS |
HOLE SPACING | NO. FASTNERS | PART NUMBER |
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| SIDE (W) | SIDE (L) | SIDE W |
SIDE L |
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| W | L | IN2 (CM2) | A | B | C | D | E | F | |||
| 3 (76.20) | 3 (76.20) | 4 | 2 (50.80) | 2 (50.80) | 1.25 (31.75) | 1.25 (31.75) | - | - | 1 | 1 | 21-0001 |
| 4 (101.60) | 4 (101.60) | 9 (58) | 3 (76.20) | 3 (76.20) | 1.75 (40.45) | 1.75 (44.45) | - | - | 1 | 1 | 21-0002 |
| 4 (101.60) | 6 (152.40) | 15 (97) | 3 (76.20) | 5 (127.00) | 1.75 (44.45) | 1.00 (25.40) | - | 3.50 (88.90) | 1 | 2 | 21-0003 |
| 4 (101.60) | 8 (203.20) | 21 (135) | 3 (76.20) | 7 (177.80) | 1.75 (44.45) | 0.75 (19.05) | - | 3.00 (76.20) | 1 | 3 | 21-0004 |
| 4 (101.60) | 12 (304.80) | 33 (213) | 3 (76.20) | 11 (279.40) | 1.75 (44.45) | 1.25 (31.75) | - | 3.00 (76.20) | 1 | 4 | 21-0005 |
| 5 (127.00) | 5 (127.00) | 16 (103) | 4 (101.60) | 4 (101.60) | 2.25 (57.15) | 0.75 (19.05) | - | 3.00 (76.20) | 1 | 2 | 21-0006 |
| 5 (127.00) | 7 (177.80) | 24 (155) | 4 (101.60) | 6 (152.40) | 2.25 (57.15) | 1.50 (38.10) | - | 3.50 (88.90) | 1 | 2 | 21.0007 |
| 5 (127.00) | 10 (254.00) | 36 (232) | 4 (101.60) | 9 (228.60) | 2.25 (57.15) | 1.25 (31.75) | - | 3.50 (88.90) | 1 | 3 | 21-0008 |
| 6 (152.40) | 6 (152.40) | 25 (161) | 5 (127.00) | 5 (127.00) | 1.00 (25.40) | 1.00 (25.40) | 3.50 (88.90) | 3.50 (88.90) | 2 | 2 | 21-0009 |
| 6 (152.40) | 8 (203.20) | 35 (226) | 5 (127.00) | 7 (177.60) | 1.25 (31.75) | 0.75 (19.05) | 3.00 (76.20) | 3.00 (76.20) | 2 | 3 | 21-0010 |
| 6 (152.40) | 12 (304.80) | 55 (355) | 5 (127.00) | 11 (279.40) | 1.00 (25.40) | 1.25 (31.75) | 3.50 (88.90) | 3.00 (76.20) | 2 | 4 | 21-0011 |
| 6 (152.40) | 18 (457.20) | 85 (548) | 5 (1 27.00) | 17 (431.80) | 1.00 (25.40) | 1.25 (31.75) | 3.50 (88.90) | 3.75 (95.25) | 2 | 5 | 21-0012 |
| 7 (177.80) | 7 (177.80) | 36 (232) | 6 (152.40) | 6 (152.40) | 1.50 (38.10) | 1.50 (38.10) | 3.50 (88.90) | 3.50 (88.90) | 2 | 2 | 21-0013 |
| 7 (177.80) | 10 (254.00) | 54(348) | 6 (152.40) | 9 (228.60) | 1.50 (38.10) | 1.25 (31.75) | 3.50 (88.90) | 3.50 (88.90) | 2 | 3 | 21-0014 |
| 7 (177.80) | 14 (355.60) | 78 (503) | 6 (152.40) | 13 (330.20) | 1.50 (38.10) | 1.50 (38.10) | 3.50 (88.90) | 3.50 (88.90) | 2 | 4 | 21-0015 |
| 8 (203.20) | 8 (203.20) | 49 (316) | 7 (177.80) | 7 (177.80) | 2.00 (50.80) | 0.75 (19.05) | 3.50 (88.90) | 3.00 (76.20) | 2 | 3 | 21-0016 |
| 8 (203.20) | 12 (304.80) | 77 (497) | 7 (177.80) | 11 (279.40) | 0.75 (19.05) | 1.25 (31.75) | 3.00 (76.20) | 3.00 (76.20) | 3 | 4 | 21-0017 |
| 8 (203.20) | 16 (406.40) | 105 (677) | 7 (177.80) | 15 (381.00) | 0.75 (19.05) | 1.25 (31.75) | 3.00 (76.20) | 3.25 (82.55) | 3 | 5 | 21-0018 |
| 10 (254.00) | 10 (254.00) | 81 (522) | 9 (228.60) | 9 (228.60) | 1.25 (31.75) | 1.25 (31.75) | 3.50 (88.90) | 3.50 (88.90) | 3 | 3 | 21-0019 |
| 10 (254.00) | 14 (355.60) | 117 (755) | 9 (228.60) | 13 (330.20) | 1.25 (31.75) | 1.50 (38.10) | 3.50 (88.90) | 3.50 (88.90) | 3 | 4 | 21-0020 |
| 10 (254.00) | 18 (457.20) | 153 (987) | 9 (228.60) | 17 (431.80) | 1.25 (31.75) | 1.25 (31.75) | 3.50 (88.90) | 3.75 (95.25) | 3 | 5 | 21-0021 |
| 12 (304.80) | 12 (304.80) | 121 (760) | 11 (279.40) | 11 (279.40) | 1.25 (31.75) | 1.25 (31.75) | 3.00 (76.20) | 3.00 (76.20) | 4 | 4 | 21-0022 |
| 12 (304.80) | 16 (406.40) | 165 (1064) | 11 (279.40) | 15 (381.00) | 1.25 (31.75) | 1.25 (31.75) | 3.00 (76.20) | 3.25 (82.55) | 4 | 5 | 21-0023 |
| 12 (304.80) | 20 (508.00) | 209 (1340) | 11 (279.40) | 19 (402.60) | 1.25 (31.75) | 1.00 (25.40) | 3.00 (76.20) | 3.50 (88.90) | 4 | 6 | 21-0024 |
| 12 (304.80) | 24 (609.60) | 253 (1632) | 11 (279.40) | 23 (584.20) | 1.25 (31.75) | 1.25 (31.75) | 3.00 (76.20) | 3.50 (88.90) | 4 | 7 | 21-0025 |