Callout Size |
Outside Dimensions |
Rough Opening (minimum-maximum) |
Free Air |
|||
Width |
Height |
Width |
Height |
SF |
% free |
23.25'' |
9.25'' |
20.75'' - 22.5'' |
6.75'' - 8.5'' |
0.686 |
56.1% |
|
23.25'' |
11.25'' |
20.75'' - 22.5'' |
8.75'' - 10.5'' |
0.903 |
59.1% |
|
23.25'' |
13.25'' |
20.75'' - 22.5'' |
10.75'' - 12.5'' |
1.120 |
61.1% |
|
23.25'' |
15.25'' |
20.75'' - 22.5'' |
12.75'' - 14.5'' |
1.337 |
62.5% |
|
23.25'' |
17.25'' |
20.75'' - 22.5'' |
14.75'' - 16.5'' |
1.554 |
63.6% |
|
23.25'' |
19.25'' |
20.75'' - 22.5'' |
16.75'' - 18.5'' |
1.771 |
64.4% |
|
23.25'' |
21.25'' |
20.75'' - 22.5'' |
18.75'' - 20.5'' |
1.988 |
65.1% |
|
23.25'' |
23.25'' |
20.75'' - 22.5'' |
20.75'' - 22.5'' |
2.205 |
65.6% |
|
23.25'' |
25.25'' |
20.75'' - 22.5'' |
22.75'' - 24.5'' |
2.422 |
66.1% |
23.25'' |
26.25'' |
20.75'' - 22.5'' |
23.75'' - 25.5'' |
2.531 |
66.3% |
|
23.25'' |
27.25'' |
20.75'' - 22.5'' |
24.75'' - 26.5'' |
2.639 |
66.4% |
|
23.25'' |
29.25'' |
20.75'' - 22.5'' |
26.75'' - 28.5'' |
2.856 |
66.8% |
|
23.25'' |
31.25'' |
20.75'' - 22.5'' |
28.75'' - 30.5'' |
3.073 |
67.1% |
|
23.25'' |
33.25'' |
20.75'' - 22.5'' |
30.75'' - 32.5'' |
3.290 |
67.3% |
|
23.25'' |
35.25'' |
20.75'' - 22.5'' |
32.75'' - 34.5'' |
3.507 |
67.5% |
|
23.25'' |
37.25'' |
20.75'' - 22.5'' |
34.75'' - 36.5'' |
3.724 |
67.7% |
|
25.25'' |
9.25'' |
22.75'' - 24.5'' |
6.75'' - 8.5'' |
0.752 |
56.4% |
|
25.25'' |
11.25'' |
22.75'' - 24.5'' |
8.75'' - 10.5'' |
0.990 |
59.4% |
|
25.25'' |
13.25'' |
22.75'' - 24.5'' |
10.75'' - 12.5'' |
1.228 |
61.4% |
|
25.25'' |
15.25'' |
22.75'' - 24.5'' |
12.75'' - 14.5'' |
1.466 |
62.8% |
|
25.25'' |
17.25'' |
22.75'' - 24.5'' |
14.75'' - 16.5'' |
1.704 |
63.9% |
|
25.25'' |
19.25'' |
22.75'' - 24.5'' |
16.75'' - 18.5'' |
1.941 |
64.7% |
|
25.25'' |
21.25'' |
22.75'' - 24.5'' |
18.75'' - 20.5'' |
2.179 |
65.4% |
|
25.25'' |
23.25'' |
22.75'' - 24.5'' |
20.75'' - 22.5'' |
2.417 |
65.9% |
|
25.25'' |
25.25'' |
22.75'' - 24.5'' |
22.75'' - 24.5'' |
2.655 |
66.4% |
|
25.25'' |
27.25'' |
22.75'' - 24.5'' |
24.75'' - 26.5'' |
2.893 |
66.8% |
|
25.25'' |
31.25'' |
22.75'' - 24.5'' |
28.75'' - 30.5'' |
3.368 |
67.4% |
|
25.25'' |
33.25'' |
22.75'' - 24.5'' |
30.75'' - 32.5'' |
3.606 |
67.6% |
|
25.25'' |
35.25'' |
22.75'' - 24.5'' |
32.75'' - 34.5'' |
3.844 |
67.8% |
|
25.25'' |
37.25'' |
22.75'' - 24.5'' |
34.75'' - 36.5'' |
4.082 |
68.0% |
|
26.25'' |
9.25'' |
23.75'' - 25.5'' |
6.75'' - 8.5'' |
0.785 |
56.5% |
|
26.25'' |
11.25'' |
23.75'' - 25.5'' |
8.75'' - 10.5'' |
1.033 |
59.5% |
|
26.25'' |
13.25'' |
23.75'' - 25.5'' |
10.75'' - 12.5'' |
1.282 |
61.5% |
|
26.25'' |
15.25'' |
23.75'' - 25.5'' |
12.75'' - 14.5'' |
1.530 |
62.9% |
|
26.25'' |
17.25'' |
23.75'' - 25.5'' |
14.75'' - 16.5'' |
1.778 |
64.0% |
|
26.25'' |
19.25'' |
23.75'' - 25.5'' |
16.75'' - 18.5'' |
2.026 |
64.8% |
|
26.25'' |
21.25'' |
23.75'' - 25.5'' |
18.75'' - 20.5'' |
2.275 |
65.5% |
|
26.25'' |
23.25'' |
23.75'' - 25.5'' |
20.75'' - 22.5'' |
2.523 |
66.1% |
|
26.25'' |
26.25'' |
23.75'' - 25.5'' |
23.75'' - 25.5'' |
2.895 |
66.7% |
|
26.25'' |
27.25'' |
23.75'' - 25.5'' |
24.75'' - 26.5'' |
3.020 |
66.9% |
|
26.25'' |
29.25'' |
23.75'' - 25.5'' |
28.75'' - 28.5'' |
3.268 |
67.2% |
|
26.25'' |
31.25'' |
23.75'' - 25.5'' |
28.75'' - 30.5'' |
3.516 |
67.5% |
|
26.25'' |
33.25'' |
23.75'' - 25.5'' |
30.75'' - 32.5'' |
3.764 |
67.8% |
|
26.25'' |
35.25'' |
23.75'' - 25.5'' |
32.75'' - 34.5'' |
4.013 |
68.0% |
|
26.25'' |
37.25'' |
23.75'' - 25.5'' |
34.75'' - 36.5'' |
4.261 |
68.2% |
|
27.25'' |
9.25'' |
24.75'' - 26.5'' |
6.75'' - 8.5'' |
0.818 |
56.6% |
|
27.25'' |
11.25'' |
24.75'' - 26.5'' |
8.75'' - 10.5'' |
1.077 |
59.6% |
|
27.25'' |
13.25'' |
24.75'' - 26.5'' |
10.75'' - 12.5'' |
1.336 |
61.6% |
|
27.25'' |
15.25'' |
24.75'' - 26.5'' |
12.75'' - 14.5'' |
1.594 |
63.1% |
|
27.25'' |
17.25'' |
24.75'' - 26.5'' |
15.75'' - 16.5'' |
1.853 |
64.1% |
27.25'' |
19.25'' |
24.75'' - 26.5'' |
16.75'' - 18.5'' |
2.112 |
65.0% |
|
27.25'' |
21.25'' |
24.75'' - 26.5'' |
18.75'' - 20.5'' |
2.370 |
65.6% |
|
27.25'' |
23.25'' |
24.75'' - 26.5'' |
20.75'' - 22.5'' |
2.629 |
66.2% |
|
27.25'' |
25.25'' |
24.75'' - 26.5'' |
22.75'' - 24.5'' |
2.888 |
66.6% |
|
27.25'' |
26.25'' |
24.75'' - 26.5'' |
23.75'' - 25.5'' |
3.017 |
66.8% |
|
27.25'' |
27.25'' |
24.75'' - 26.5'' |
24.75'' - 26.5'' |
3.146 |
67.0% |
|
27.25'' |
29.25'' |
24.75'' - 26.5'' |
26.75'' - 28.5'' |
3.405 |
67.4% |
|
27.25'' |
31.25'' |
24.75'' - 26.5'' |
30.75'' - 30.5'' |
3.664 |
67.6% |
|
27.25'' |
33.25'' |
24.75'' - 26.5'' |
30.75'' - 32.5'' |
3.922 |
67.9% |
|
27.25'' |
35.25'' |
24.75'' - 26.5'' |
32.75'' - 34.5'' |
4.181 |
68.1% |
|
27.25'' |
37.25'' |
24.75'' - 26.5'' |
34.75'' - 36.5'' |
4.440 |
68.3% |
|
29.25'' |
9.25'' |
26.75'' - 28.5'' |
6.75'' - 8.5'' |
0.884 |
56.8% |
|
29.25'' |
11.25'' |
26.75'' - 28.5'' |
8.75'' - 10.5'' |
1.164 |
59.8% |
|
29.25'' |
13.25'' |
26.75'' - 28.5'' |
10.75'' - 12.5'' |
1.443 |
61.8% |
|
29.25'' |
15.25'' |
26.75'' - 28.5'' |
12.75'' - 14.5'' |
1.723 |
63.3% |
|
29.25'' |
17.25'' |
26.75'' - 28.5'' |
14.75'' - 16.5'' |
2.002 |
64.4% |
|
29.25'' |
19.25'' |
26.75'' - 28.5'' |
16.75'' - 18.5'' |
2.282 |
65.2% |
|
29.25'' |
21.25'' |
26.75'' - 28.5'' |
18.75'' - 20.5'' |
2.561 |
65.9% |
|
29.25'' |
23.25'' |
26.75'' - 28.5'' |
20.75'' - 22.5'' |
2.841 |
66.4% |
|
29.25'' |
25.25'' |
26.75'' - 28.5'' |
22.75'' - 24.5'' |
3.120 |
66.9% |
|
29.25'' |
26.25'' |
26.75'' - 28.5'' |
23.75'' - 25.5'' |
3.260 |
67.1% |
|
29.25'' |
27.25'' |
26.75'' - 28.5'' |
24.75'' - 26.5'' |
3.400 |
67.2% |
|
29.25'' |
29.25'' |
26.75'' - 28.5'' |
26.75'' - 28.5'' |
3.679 |
67.6% |
|
29.25'' |
31.25'' |
26.75'' - 28.5'' |
28.75'' - 30.5'' |
3.959 |
67.9% |
|
29.25'' |
33.25'' |
26.75'' - 28.5'' |
30.75'' - 32.5'' |
4.238 |
68.1% |
|
29.25'' |
35.25'' |
26.75'' - 28.5'' |
32.75'' - 34.5'' |
4.518 |
68.3% |
|
29.25'' |
37.25'' |
26.75'' - 28.5'' |
34.75'' - 36.5'' |
4.797 |
68.5% |
|
31.25'' |
9.25'' |
28.75'' - 30.5'' |
6.75'' - 8.5'' |
0.950 |
57.0% |
|
31.25'' |
11.25'' |
28.75'' - 30.5'' |
8.75'' - 10.5'' |
1.250 |
60.0% |
|
31.25'' |
13.25'' |
28.75'' - 30.5'' |
10.75'' - 12.5'' |
1.551 |
62.0% |
|
31.25'' |
15.25'' |
28.75'' - 30.5'' |
12.75'' - 14.5'' |
1.851 |
63.5% |
|
31.25'' |
17.25'' |
28.75'' - 30.5'' |
14.75'' - 16.5'' |
2.151 |
64.5% |
|
31.25'' |
19.25'' |
28.75'' - 30.5'' |
16.75'' - 18.5'' |
2.452 |
65.4% |
|
31.25'' |
21.25'' |
28.75'' - 30.5'' |
18.75'' - 20.5'' |
2.752 |
66.1% |
|
31.25'' |
23.25'' |
28.75'' - 30.5'' |
20.75'' - 22.5'' |
3.053 |
66.6% |
|
31.25'' |
25.25'' |
28.75'' - 30.5'' |
22.75'' - 24.5'' |
3.353 |
67.1% |
|
31.25'' |
26.25'' |
28.75'' - 30.5'' |
23.75'' - 25.5'' |
3.503 |
67.3% |
|
31.25'' |
27.25'' |
28.75'' - 30.5'' |
24.75'' - 26.5'' |
3.653 |
67.4% |
|
31.25'' |
29.25'' |
28.75'' - 30.5'' |
26.75'' - 28.5'' |
3.954 |
67.8% |
|
31.25'' |
31.25'' |
28.75'' - 30.5'' |
28.75'' - 30.5'' |
4.254 |
68.1% |
|
33.25'' |
9.25'' |
30.75'' - 32.5'' |
6.75'' - 8.5'' |
0.998 |
46.7% |
33.25'' |
11.25'' |
30.75'' - 32.5'' |
8.75'' - 10.5'' |
1.313 |
50.5% |
|
33.25'' |
13.25'' |
30.75'' - 32.5'' |
10.75'' - 12.5'' |
1.628 |
53.2% |
|
33.25'' |
15.25'' |
30.75'' - 32.5'' |
12.75'' - 14.5'' |
1.943 |
55.2% |
|
33.25'' |
17.25'' |
30.75'' - 32.5'' |
14.75'' - 16.5'' |
2.258 |
56.7% |
|
33.25'' |
19.25'' |
30.75'' - 32.5'' |
16.75'' - 18.5'' |
2.573 |
57.9% |
|
33.25'' |
21.25'' |
30.75'' - 32.5'' |
18.75'' - 20.5'' |
2.888 |
58.9% |
|
35.25'' |
9.25'' |
32.75'' - 34.5'' |
6.75'' - 8.5'' |
1.064 |
47.0% |
|
35.25'' |
11.25'' |
32.75'' - 34.5'' |
8.75'' - 10.5'' |
1.400 |
50.8% |
|
35.25'' |
13.25'' |
32.75'' - 34.5'' |
10.75'' - 12.5'' |
1.736 |
53.5% |
|
35.25'' |
15.25'' |
32.75'' - 34.5'' |
12.75'' - 14.5'' |
2.072 |
55.5% |
|
35.25'' |
17.25'' |
32.75'' - 34.5'' |
14.75'' - 16.5'' |
2.408 |
57.0% |
|
35.25'' |
19.25'' |
32.75'' - 34.5'' |
16.75'' - 18.5'' |
2.743 |
58.2% |
|
35.25'' |
21.25'' |
32.75'' - 34.5'' |
18.75'' - 20.5'' |
3.079 |
59.2% |
|
37.25'' |
9.25'' |
34.75'' - 36.5'' |
3.75'' - 8.5'' |
1.130 |
47.2% |
|
37.25'' |
11.25'' |
34.75'' - 36.5'' |
8.75'' - 10.5'' |
1.487 |
51.1% |
|
37.25'' |
13.25'' |
34.75'' - 36.5'' |
10.75'' - 12.5'' |
1.843 |
53.8% |
|
37.25'' |
15.25'' |
34.75'' - 36.5'' |
12.75'' - 14.5'' |
2.200 |
55.8% |
|
37.25'' |
17.25'' |
34.75'' - 36.5'' |
14.75'' - 16.5'' |
2.557 |
57.3% |
|
37.25'' |
19.25'' |
34.75'' - 36.5'' |
16.75'' - 18.5'' |
2.914 |
58.5% |
|
37.25'' |
21.25'' |
34.75'' - 36.5'' |
18.75'' - 20.5'' |
3.270 |
59.5% |