filter size | rough opening | overall dims | free area (sq in) | price in paint grade | price in red oak |
---|---|---|---|---|---|

12 x 12 | 13 x 13 | 14.75 x 14.75 | 30 | $69.95 | $87.95 |

12 x 24 | 13 x 25 | 14.75 by 26.75 | 62 | $139.95 | $175.95 |

12 x 36 | 13 x 37 | 14.75 x 38.75 | 95 | $209.95 | $263.95 |

14 x 14 | 15 x 15 | 16.75 x 16.75 | 39 | $95.95 | $119.95 |

14 x 20 | 15 x 21 | 16.75 x 22.75 | 59 | $135.95 | $171.95 |

14 x 25 | 15 x 26 | 16.75 x 27.75 | 78 | $169.95 | $213.95 |

14 x 30 | 15 x 31 | 16.75 x 32.75 | 93 | $203.95 | $255.95 |

16 x 16 | 17 x 17 | 18.75 X 18.75 | 57 | $123.95 | $155.95 |

16 x 20 | 17 x 21 | 18.75 x 22.75 | 68 | $155.95 | $195.95 |

16 x 25 | 17 x 26 | 18.75 x 27.75 | 90 | $193.95 | $243.95 |

18 x 18 | 19 x 19 | 20.75 x 20.75 | 70 | $157.95 | $197.95 |

20 x 20 | 21 x 21 | 22.75 x 22.75 | 86 | $193.95 | $243.95 |

20 x 25 | 21 x 26 | 22.75 x 27.75 | 114 | $243.95 | $303.95 |

20 x 30 | 21 x 31 | 22.75 x 32.75 | 136 | $291.95 | $365.95 |

24 x 12 | 25 x 13 | 26.75 x 14.75 | 61 | $139.95 | $175.95 |

24 x 24 | 25 x 25 | 26.75 x 26.75 | 130 | $279.95 | $349.95 |

24 x 36 | 25 x 37 | 26.75 x 38.75 | 199 | $419.95 | $525.95 |

25 x 20 | 26 x 21 | 27.75 x 22.75 | 108 | $243.95 | $303.95 |

30 x 20 | 31 x 21 | 32.75 x 22.75 | 131 | $291.95 | $365.95 |

custom sizes:

68 cents per square inch of duct opening in paint grade

80 cents per square inch of duct opening in red oak

s&h: 8%, but at least $14.95