Wood Return Air Filter Grille Specifications Chart

Use this chart to help you determine the correct wood return air filter grille for your application.  For more information on how to choose the correct grille click here.  To see technical specifications for our panel only vents, click here.
10x10 10'' 10'' 14.5'' 14.5'' 10.25'' - 12.75'' 10.25'' - 12.75'' Side - reversible 0.428 61.60% 0.287 60.70%
10x16 10'' 16'' 14.5'' 20.5'' 10.25'' - 12.75'' 16.25'' - 18.75'' Side - reversible 0.725 65.20% 0.487 59.70%
10x20 10'' 20'' 14.5'' 24.5'' 10.25'' - 12.75'' 20.25'' - 22.75'' Side - reversible 0.923 66.40% 0.621 59.40%
10x24 10'' 24'' 14.5'' 28.5'' 10.25'' - 12.75'' 24.25'' - 26.75'' Side - reversible 1.121 67.20% 0.755 59.21%
10x25 10'' 25'' 14.5'' 29.5'' 10.25'' - 12.75'' 25.25'' - 27.75'' Side - reversible 1.17 67.40% 0.788 59.17%
10x30 10'' 30'' 14.5'' 34.5'' 10.25'' - 12.75'' 30.25'' - 32.75'' Side - reversible 1.418 68.00% 0.955 59.02%
12x12 12'' 12'' 16.5'' 16.5'' 12.25'' - 14.75'' 12.25'' - 14.75'' Side - reversible 0.638 63.80% 0.436 59.79%
12x14 12'' 14'' 16.5'' 18.5'' 12.25'' - 14.75'' 14.25'' - 16.75'' Side - reversible 0.758 65.00% 0.519 59.48%
12x16 12'' 16'' 16.5'' 20.5'' 12.25'' - 14.75'' 16.25'' - 18.75'' Side - reversible 0.878 65.80% 0.601 59.26%
12x18 12'' 18'' 16.5'' 22.5'' 12.25'' - 14.75'' 18.25'' - 20.75'' Side - reversible 0.997 66.50% 0.684 59.10%
12x20 12'' 20'' 16.5'' 24.5'' 12.25'' - 14.75'' 20.25'' - 22.75'' Side - reversible 1.117 67.00% 0.766 58.97%
12x24 12'' 24'' 16.5'' 28.5'' 12.25'' - 14.75'' 24.25'' - 26.75'' Side - reversible 1.357 67.80% 0.931 58.78%
12x25 12'' 25'' 16.5'' 29.5'' 12.25'' - 14.75'' 25.25'' - 27.75'' Side - reversible 1.417 68.00% 0.972 58.75%
12x27 12'' 27'' 16.5'' 31.5'' 12.25'' - 14.75'' 27.25'' - 29.75'' Side - reversible 1.536 68.30% 1.055 58.68%
12x30 12'' 30'' 16.5'' 34.5'' 12.25'' - 14.75'' 30.25'' - 32.75'' Side - reversible 1.716 68.60% 1.178 58.60%
12x36 12'' 36'' 16.5'' 40.5'' 12.25'' - 14.75'' 36.25'' - 38.75'' Side - reversible 2.076 69.20% 1.426 58.48%
13x18 13'' 18'' 17.5'' 22.5'' 13.25'' - 15.75'' 18.25'' - 20.75'' Side - reversible 1.084 66.70% 0.748 58.94%
13x20 13'' 20'' 17.5'' 24.5'' 13.25'' - 15.75'' 20.25'' - 22.75'' Side - reversible 1.214 67.30% 0.839 58.81%
14x10 14'' 10'' 18.5'' 14.5'' 14.25'' - 16.75'' 10.25'' - 12.75'' Bottom 0.609 62.60% 0.421 59.93%
14x14 14'' 14'' 18.5'' 18.5'' 14.25'' - 16.75'' 14.25'' - 16.75'' Side - reversible 0.89 65.40% 0.617 59.18%
14x18 14'' 18'' 18.5'' 22.5'' 14.25'' - 16.75'' 18.25'' - 20.75'' Side - reversible 1.171 66.90% 0.813 58.81%
14x20 14'' 20'' 18.5'' 24.5'' 14.25'' - 16.75'' 20.25'' - 22.75'' Side - reversible 1.312 67.50% 0.911 58.68%
14x22 14'' 22'' 18.5'' 26.5'' 14.25'' - 16.75'' 22.25'' - 24.75'' Side - reversible 1.452 67.90% 1.009 58.58%
14x24 14'' 24'' 18.5'' 28.5'' 14.25'' - 16.75'' 24.25'' - 26.75'' Side - reversible 1.593 68.30% 1.107 58.50%
14x25 14'' 25'' 18.5'' 29.5'' 14.25'' - 16.75'' 25.25'' - 27.75'' Side - reversible 1.663 68.40% 1.156 58.46%
14x28 14'' 28'' 18.5'' 32.5'' 14.25'' - 16.75'' 28.25'' - 30.75'' Side - reversible 1.874 68.80% 1.303 58.37%
14x30 14'' 30'' 18.5'' 34.5'' 14.25'' - 16.75'' 30.25'' - 32.75'' Side - reversible 2.015 69.10% 1.401 58.32%
14x36 14'' 36'' 18.5'' 40.5'' 14.25'' - 16.75'' 36.25'' - 38.75'' Side - reversible 2.437 69.60% 1.696 58.20%
15x20 15'' 20'' 19.5'' 24.5'' 15.25'' - 17.75'' 20.25'' - 22.75'' Side - reversible 1.409 67.60% 0.984 58.57%
15x25 15'' 25'' 19.5'' 29.5'' 15.25'' - 17.75'' 25.25'' - 27.75'' Side - reversible 1.786 68.60% 1.248 58.35%
15x30 15'' 30'' 19.5'' 34.5'' 15.25'' - 17.75'' 30.25'' - 32.75'' Side - reversible 2.164 69.30% 1.513 58.21%
16x10 16'' 10'' 20.5'' 14.5'' 16.25'' - 18.75'' 10.25'' - 12.75'' Bottom 0.699 62.90% 0.487 59.70%
16x12 16'' 12'' 20.5'' 16.5'' 16.25'' - 18.75'' 12.25'' - 14.75'' Bottom 0.86 64.50% 0.601 59.26%
16x16 16'' 16'' 20.5'' 20.5'' 16.25'' - 18.75'' 16.25'' - 18.75'' Side - reversible 1.183 66.60% 0.829 58.76%
16x18 16'' 18'' 20.5'' 22.5'' 16.25'' - 18.75'' 18.25'' - 20.75'' Side - reversible 1.345 67.20% 0.942 58.60%
16x20 16'' 20'' 20.5'' 24.5'' 16.25'' - 18.75'' 20.25'' - 22.75'' Side - reversible 1.506 67.80% 1.056 58.47%
16x24 16'' 24'' 20.5'' 28.5'' 16.25'' - 18.75'' 24.25'' - 26.75'' Side - reversible 1.829 68.60% 1.283 58.29%
16x25 16'' 25'' 20.5'' 29.5'' 16.25'' - 18.75'' 25.25'' - 27.75'' Side - reversible 1.91 68.80% 1.34 58.25%
16x30 16'' 30'' 20.5'' 34.5'' 16.25'' - 18.75'' 30.25'' - 32.75'' Side - reversible 2.313 69.40% 1.625 58.11%
16x32 16'' 32'' 20.5'' 36.5'' 16.25'' - 18.75'' 32.25'' - 34.75'' Side - reversible 2.475 69.60% 1.738 58.07%
16x36 16'' 36'' 20.5'' 40.5'' 16.25'' - 18.75'' 36.25'' - 38.75'' Side - reversible 2.798 69.90% 1.966 58.00%
17x17 17'' 17'' 21.5'' 21.5'' 17.25'' - 19.75'' 17.25'' - 19.75'' Side - reversible 1.345 67.00% 0.946 58.59%
17x29 17'' 29'' 21.5'' 33.5'' 17.25'' - 19.75'' 29.25'' - 31.75'' Side - reversible 2.377 69.40% 1.675 58.05%
17x30 17'' 30'' 21.5'' 34.5'' 17.25'' - 19.75'' 30.25'' - 32.75'' Side - reversible 2.463 69.50% 1.736 58.03%
18x12 18'' 12'' 22.5'' 16.5'' 18.25'' - 20.75'' 12.25'' - 14.75'' Bottom 0.971 64.80% 0.684 59.10%
18x13 18'' 13'' 22.5'' 17.5'' 18.25'' - 20.75'' 13.25'' - 15.75'' Bottom 1.063 65.40% 0.748 58.94%
18x14 18'' 14'' 22.5'' 18.5'' 18.25'' - 20.75'' 14.25'' - 16.75'' Bottom 1.154 65.90% 0.813 58.81%
18x16 18'' 16'' 22.5'' 20.5'' 18.25'' - 20.75'' 16.25'' - 18.75'' Bottom 1.336 66.80% 0.942 58.60%
18x18 18'' 18'' 22.5'' 22.5'' 18.25'' - 20.75'' 18.25'' - 20.75'' Side - reversible 1.518 67.50% 1.072 58.44%
18x20 18'' 20'' 22.5'' 24.5'' 18.25'' - 20.75'' 20.25'' - 22.75'' Side - reversible 1.701 68.00% 1.201 58.31%
18x24 18'' 24'' 22.5'' 28.5'' 18.25'' - 20.75'' 24.25'' - 26.75'' Side - reversible 2.065 68.80% 1.46 58.13%
18x25 18'' 25'' 22.5'' 29.5'' 18.25'' - 20.75'' 25.25'' - 27.75'' Side - reversible 2.156 69.00% 1.524 58.10%
18x30 18'' 30'' 22.5'' 34.5'' 18.25'' - 20.75'' 30.25'' - 32.75'' Side - reversible 2.612 69.70% 1.848 57.96%
18x36 18'' 36'' 22.5'' 40.5'' 18.25'' - 20.75'' 36.25'' - 38.75'' Side - reversible 3.159 70.20% 2.236 57.84%
19x21 19'' 21'' 23.5'' 25.5'' 19.25'' - 21.75'' 21.25'' - 23.75'' Side - reversible 1.894 68.40% 1.342 58.20%
19x22 19'' 22'' 23.5'' 26.5'' 19.25'' - 21.75'' 22.25'' - 24.75'' Side - reversible 1.99 68.60% 1.411 58.15%
19x27 19'' 27'' 23.5'' 31.5'' 19.25'' - 21.75'' 27.25'' - 29.75'' Side - reversible 2.472 69.40% 1.753 57.97%
20x10 20'' 10'' 24.5'' 14.5'' 20.25'' - 22.75'' 10.25'' - 12.75'' Bottom 0.879 63.30% 0.621 59.40%
20x12 20'' 12'' 24.5'' 16.5'' 20.25'' - 22.75'' 12.25'' - 14.75'' Bottom 1.082 64.90% 0.766 58.97%
20x13 20'' 13'' 24.5'' 17.5'' 20.25'' - 22.75'' 13.25'' - 15.75'' Bottom 1.184 65.60% 0.839 58.81%
20x14 20'' 14'' 24.5'' 18.5'' 20.25'' - 22.75'' 14.25'' - 16.75'' Bottom 1.286 66.10% 0.911 58.68%
20x15 20'' 15'' 24.5'' 19.5'' 20.25'' - 22.75'' 15.25'' - 17.75'' Bottom 1.387 66.60% 0.984 58.57%
20x16 20'' 16'' 24.5'' 20.5'' 20.25'' - 22.75'' 16.25'' - 18.75'' Bottom 1.489 67.00% 1.056 58.47%
20x18 20'' 18'' 24.5'' 22.5'' 20.25'' - 22.75'' 18.25'' - 20.75'' Bottom 1.692 67.70% 1.201 58.31%
20x20 20'' 20'' 24.5'' 24.5'' 20.25'' - 22.75'' 20.25'' - 22.75'' Side - reversible 1.895 68.20% 1.346 58.19%
20x21 20'' 21'' 24.5'' 25.5'' 20.25'' - 22.75'' 21.25'' - 23.75'' Side - reversible 1.997 68.50% 1.418 58.14%
20x22 20'' 22'' 24.5'' 26.5'' 20.25'' - 22.75'' 22.25'' - 24.75'' Side - reversible 2.098 68.70% 1.491 58.09%
20x24 20'' 24'' 24.5'' 28.5'' 20.25'' - 22.75'' 24.25'' - 26.75'' Side - reversible 2.301 69.00% 1.636 58.01%
20x25 20'' 25'' 24.5'' 29.5'' 20.25'' - 22.75'' 25.25'' - 27.75'' Side - reversible 2.403 69.20% 1.708 57.98%
20x30 20'' 30'' 24.5'' 34.5'' 20.25'' - 22.75'' 30.25'' - 32.75'' Side - reversible 2.911 69.90% 2.071 57.84%
21x19 21'' 19'' 25.5'' 23.5'' 21.25'' - 23.75'' 19.25'' - 21.75'' Bottom 1.885 68.00% 1.342 58.20%
21x20 21'' 20'' 25.5'' 24.5'' 21.25'' - 23.75'' 20.25'' - 22.75'' Bottom 1.992 68.30% 1.418 58.14%
22x14 22'' 14'' 26.5'' 18.5'' 22.25'' - 24.75'' 14.25'' - 16.75'' Bottom 1.418 66.30% 1.009 58.58%
22x19 22'' 19'' 26.5'' 23.5'' 22.25'' - 24.75'' 19.25'' - 21.75'' Bottom 1.977 68.10% 1.411 58.15%
22x20 22'' 20'' 26.5'' 24.5'' 22.25'' - 24.75'' 20.25'' - 22.75'' Bottom 2.089 68.40% 1.491 58.09%
24x10 24'' 10'' 28.5'' 14.5'' 24.25'' - 26.75'' 10.25'' - 12.75'' Bottom 1.06 63.60% 0.755 59.21%
24x12 24'' 12'' 28.5'' 16.5'' 24.25'' - 26.75'' 12.25'' - 14.75'' Bottom 1.305 65.20% 0.931 58.78%
24x14 24'' 14'' 28.5'' 18.5'' 24.25'' - 26.75'' 14.25'' - 16.75'' Bottom 1.549 66.40% 1.107 58.50%
24x16 24'' 16'' 28.5'' 20.5'' 24.25'' - 26.75'' 16.25'' - 18.75'' Bottom 1.794 67.30% 1.283 58.29%
24x18 24'' 18'' 28.5'' 22.5'' 24.25'' - 26.75'' 18.25'' - 20.75'' Bottom 2.039 68.00% 1.46 58.13%
24x20 24'' 20'' 28.5'' 24.5'' 24.25'' - 26.75'' 20.25'' - 22.75'' Bottom 2.284 68.50% 1.636 58.01%
24x24 24'' 24'' 28.5'' 28.5'' 24.25'' - 26.75'' 24.25'' - 26.75'' Side - reversible 2.773 69.30% 1.988 57.83%
24x30 24'' 30'' 28.5'' 34.5'' 24.25'' - 26.75'' 30.25'' - 32.75'' Side - reversible 3.508 70.20% 2.517 57.66%
25x10 25'' 10'' 29.5'' 14.5'' 25.25'' - 27.75'' 10.25'' - 12.75'' Bottom 1.105 63.70% 0.788 59.17%
25x12 25'' 12'' 29.5'' 16.5'' 25.25'' - 27.75'' 12.25'' - 14.75'' Bottom 1.36 65.30% 0.972 58.75%
25x14 25'' 14'' 29.5'' 18.5'' 25.25'' - 27.75'' 14.25'' - 16.75'' Bottom 1.615 66.50% 1.156 58.46%
25x15 25'' 15'' 29.5'' 19.5'' 25.25'' - 27.75'' 15.25'' - 17.75'' Bottom 1.743 66.90% 1.248 58.35%
25x16 25'' 16'' 29.5'' 20.5'' 25.25'' - 27.75'' 16.25'' - 18.75'' Bottom 1.871 67.30% 1.34 58.25%
25x18 25'' 18'' 29.5'' 22.5'' 25.25'' - 27.75'' 18.25'' - 20.75'' Bottom 2.126 68.00% 1.524 58.10%
25x20 25'' 20'' 29.5'' 24.5'' 25.25'' - 27.75'' 20.25'' - 22.75'' Bottom 2.381 68.60% 1.708 57.98%
25x25 25'' 25'' 29.5'' 29.5'' 25.25'' - 27.75'' 25.25'' - 27.75'' Side - reversible 3.019 69.60% 2.168 57.76%
27x12 27'' 12'' 31.5'' 16.5'' 27.25'' - 29.75'' 12.25'' - 14.75'' Bottom 1.471 65.40% 1.055 58.68%
27x19 27'' 19'' 31.5'' 23.5'' 27.25'' - 29.75'' 19.25'' - 21.75'' Bottom 2.438 68.40% 1.753 57.97%
28x14 28'' 14'' 32.5'' 18.5'' 28.25'' - 30.75'' 14.25'' - 16.75'' Bottom 1.813 66.60% 1.303 58.37%
29x17 29'' 17'' 33.5'' 21.5'' 29.25'' - 31.75'' 17.25'' - 19.75'' Bottom 2.325 67.90% 1.675 58.05%
30x10 30'' 10'' 34.5'' 14.5'' 30.25'' - 32.75'' 10.25'' - 12.75'' Bottom 1.331 63.90% 0.955 59.02%
30x12 30'' 12'' 34.5'' 16.5'' 30.25'' - 32.75'' 12.25'' - 14.75'' Bottom 1.638 65.50% 1.178 58.60%
30x14 30'' 14'' 34.5'' 18.5'' 30.25'' - 32.75'' 14.25'' - 16.75'' Bottom 1.945 66.70% 1.401 58.32%
30x15 30'' 15'' 34.5'' 19.5'' 30.25'' - 32.75'' 15.25'' - 17.75'' Bottom 2.099 67.20% 1.513 58.21%
30x16 30'' 16'' 34.5'' 20.5'' 30.25'' - 32.75'' 16.25'' - 18.75'' Bottom 2.253 67.60% 1.625 58.11%
30x17 30'' 17'' 34.5'' 21.5'' 30.25'' - 32.75'' 17.25'' - 19.75'' Bottom 2.406 67.90% 1.736 58.03%
30x18 30'' 18'' 34.5'' 22.5'' 30.25'' - 32.75'' 18.25'' - 20.75'' Bottom 2.56 68.30% 1.848 57.96%
30x20 30'' 20'' 34.5'' 24.5'' 30.25'' - 32.75'' 20.25'' - 22.75'' Bottom 2.867 68.80% 2.071 57.84%
30x24 30'' 24'' 34.5'' 28.5'' 30.25'' - 32.75'' 24.25'' - 26.75'' Bottom 3.482 69.60% 2.517 57.66%
30x30 30'' 30'' 34.5'' 34.5'' 30.25'' - 32.75'' 30.25'' - 32.75'' Side - reversible 4.404 70.50% 3.186 57.49%
32x16 32'' 16'' 36.5'' 20.5'' 32.25'' - 34.75'' 16.25'' - 18.75'' Bottom 2.405 67.70% 1.738 58.07%
32x20 32'' 20'' 36.5'' 24.5'' 32.25'' - 34.75'' 20.25'' - 22.75'' Bottom 3.062 68.90% 2.216 57.79%
34x20 34'' 20'' 38.5'' 24.5'' 34.25'' - 36.75'' 20.25'' - 22.75'' Bottom 3.256 69.00% 2.361 57.76%
36x10 36'' 10'' 40.5'' 14.5'' 36.25'' - 38.75'' 10.25'' - 12.75'' Bottom 1.602 64.10% 1.156 58.90%
36x12 36'' 12'' 40.5'' 16.5'' 36.25'' - 38.75'' 12.25'' - 14.75'' Bottom 1.971 65.70% 1.426 58.48%
36x14 36'' 14'' 40.5'' 18.5'' 36.25'' - 38.75'' 14.25'' - 16.75'' Bottom 2.341 66.90% 1.696 58.20%
36x18 36'' 18'' 40.5'' 22.5'' 36.25'' - 38.75'' 18.25'' - 20.75'' Bottom 3.081 68.50% 2.236 57.84%
36x20 36'' 20'' 40.5'' 24.5'' 36.25'' - 38.75'' 20.25'' - 22.75'' Bottom 3.451 69.00% 2.506 57.72%