17142-A, pg 4
Model PDBB
Performance Data (CFM)
*Maximum recommended free area intake velocity.
See catalog product page for construction details.
Performance Caution: Wind driven rain conditions could cause some water to penetrate through the louver
blades. Louvered penthouses are reasonably weather tight. However, they are not recommended for use
where airborn water droplets from storms or high winds may damage the interior of the building. Provisions
should always be made for potential wind driven rain or snow carry over because air can pass completely
through a louvered penthouse.
Length
+ Width
(A + B)
Height
(Tiers)
Free Area Velocity / Pressure Drop - Intake (fpm/in. of w.g.)
200/.025 300/.045 400/.050 500/.060 *600/.080 700/.090 800/.110 900/.130 1000/.155
24
16” (3) 400 600 800 1,000 1,225 1,425 1,625 1,825 2,025
20-1/2” (4) 625 950 1,275 1,600 1,900 2,225 2,560 2,875 3,200
36
16” (3) 600 900 1,200 1,520 1,825 2,125 2,425 2,725 3,025
20-1/2” (4) 925 1,375 1,850 2,300 2,775 3,225 3,700 4,175 4,625
48
16” (3) 775 1,175 1,575 1,975 2,375 2,750 3,150 3,550 3,950
20-1/2” (4) 1,200 1,825 2,425 3,050 3,650 4,275 4,875 5,500 6,100
25-1/4” (5) 1,600 2,400 3,225 4,025 4,825 5,650 6,450 7,250 8,075
60
16” (3) 975 1,475 1,975 2,475 2,975 3,450 3,950 4,450 4,950
20-1/2” (4) 1,500 2,275 3,025 3,800 4,550 5,300 6,075 6,825 7,600
25-1/4” (5) 2,000 3,000 4,000 5,000 6,000 7,000 8,000 9,000 10,000
29-3/4” (6) 2,375 3,575 4,750 5,950 7,150 8,325 9,525 10,725 11,900
34-1/2” (7) 2,725 4,100 5,475 6,850 8,225 9,600 10,975 12,325 13,700
72
20-1/2” (4) 1,800 2,700 3,625 4,525 5,425 6,350 7,250 8,150 9,075
25-1/4” (5) 2,400 3,600 4,800 6,000 7,200 8,400 9,600 10,800 12,000
29-3/4” (6) 2,825 4,250 5,700 7,100 8,525 9,950 11,350 12,800 14,200
34-1/2” (7) 3,275 4,925 6,575 8,225 9,875 11,525 13,175 14,825 16,475
39” (8) 3,825 5,750 7,700 9,600 11,525 13,450 15,375 17,300 19,225
84
25-1/4” (5) 2,775 4,175 5,575 6,975 8,375 9,750 11,150 12,550 13,950
29-3/4” (6) 3,300 4,950 6,600 8,250 9,900 11,550 13,200 14,850 16,500
34-1/2” (7) 3,828 5,725 7,650 9,575 11,500 13,400 15,325 17,225 19,150
39” (8) 4,475 6,700 8,950 11,200 13,425 15,675 17,900 20,150 22,400
43-5/8” (9) 5,125 7,675 10,250 12,800 15,375 17,925 20,500 23,075 25,625
96
25-1/4” (5) 3,175 4,775 6,350 7,950 9,550 11,100 12,725 14,300 15,900
29-3/4” (6) 3,750 5,650 7,525 9,400 11,300 13,175 15,050 16,950 18,000
34-1/2” (7) 4,350 6,550 8,725 10,900 13,100 15,275 17,450 19,650 21,800
39” (8) 5,100 7,650 10,200 12,750 15,300 17,850 20,400 22,950 25,500
43-5/8” (9) 5,825 8,750 11,675 14,600 17,500 20,425 23,350 26,275 29,200
48-3/8” (10) 6,425 9,650 12,875 16,100 19,300 22,550 25,775 29,000 32,200
120
25-1/4” (5) 3,950 5,950 7,925 9,900 11,900 13,875 15,850 17,850 19,800
29-3/4” (6) 4,700 7,025 9,375 11,725 14,075 16,425 18,775 21,100 23,475
34-1/2” (7) 5,425 8,150 10,875 13,600 16,300 19,000 21,750 24,450 27,200
39” (8) 6,350 9,525 12,700 15,900 19,075 22,250 25,400 28,600 31,800
43-5/8” (9) 7,275 10,900 14,550 18,200 21,825 25,475 29,100 32,750 36,400
48-3/8” (10) 8,025 12,025 16,050 20,075 24,075 28,100 32,100 36,100 40,150