| filter size | rough opening | overall dims | free area (sq in) | paint grade or red oak |
|---|---|---|---|---|
| 12 x 12 | 13 x 13 | 14.75 x 14.75 | 30 | $87.95 |
| 12 x 24, or 24 x 12 | 13 x 25 | 14.75 by 26.75 | 62 | $175.95 |
| 12 x 36, or 36 x 12 | 13 x 37 | 14.75 x 38.75 | 95 | $263.95 |
| 14 x 14 | 15 x 15 | 16.75 x 16.75 | 39 | $119.95 |
| 14 x 20, or 30 x 14 | 15 x 21 | 16.75 x 22.75 | 59 | $171.95 |
| 14 x 25, or 25 x 14 | 15 x 26 | 16.75 x 27.75 | 78 | $213.95 |
| 14 x 30, or 30 x 14 | 15 x 31 | 16.75 x 32.75 | 93 | $257.95 |
| 16 x 16 | 17 x 17 | 18.75 X 18.75 | 57 | $155.95 |
| 16 x 20, or 20 x 16 | 17 x 21 | 18.75 x 22.75 | 68 | $195.95 |
| 16 x 25, or 25 x 16 | 17 x 26 | 18.75 x 27.75 | 90 | $243.95 |
| 18 x 18 | 19 x 19 | 20.75 x 20.75 | 70 | $199.95 |
| 20 x 20 | 21 x 21 | 22.75 x 22.75 | 86 | $243.95 |
| 20 x 25, or 25 x 20 | 21 x 26 | 22.75 x 27.75 | 114 | $307.95 |
| 20 x 30, or 30 x 20 | 21 x 31 | 22.75 x 32.75 | 136 | $367.95 |
| 24 x 12, or 12 x 24 | 25 x 13 | 26.75 x 14.75 | 61 | $175.95 |
| 24 x 24 | 25 x 25 | 26.75 x 26.75 | 130 | $351.95 |
| 24 x 36, or 36 x 24 | 25 x 37 | 26.75 x 38.75 | 199 | $529.95 |
custom sizes: call for quote!
s&h: $25 per unit
