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P R A P K                  90-95 %     80-85 %      60-65 %      40-45 %
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            SIZE    PKT    A IR  FLO W    IN ITIA L    IN ITIA L    IN ITIA L    IN ITIA L    ME IA        SIZE
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          W  x H x  D  N O.  C A P C IT Y  R ESIST.    R ESIST.     R ESIST.     R ESIST.    SQ A R E    W  x H x  D
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          N OMI A L           C FM        IN .  .G.    IN .  .G.    IN .  .G.    IN .  .G.    FEET       N OMI A L
                                             W
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              N
                                                                                                           MM
          24 x 24 x 15  6  1000  1250  1500  .50  .62  .74 .42  .52  .62 .35  .43  .52 .29  .35  .42  35.75  610 x 610 x 381
          24 x 24 x 15  7  1000  1250  1500  .47  .57  .70 .39  .48  .59 .33  .40  .49 .27  .33  .40  41.71  610 x 610 x 381
          24 x 24 x 15  8  1000  1250  1500  .42  .53  .67 .35  .45  .56 .29  .37  .47 .24  .30  .38  47.66  610 x 610 x 381
          24 x 24 x 15  10  1000  1250  1500  .38  .45  .60 .32  .38  .50 .26  .31  .42  -  -  -  59.58  610 x 610 x 381
          24 x 24 x 15  12  1000  1250  1500  .30  .37  .53 .25  .31  .45 .21  .26  .37  -  -  -  71.50  610 x 610 x 381
          24 x 24 x 21  6  1000  1250  1500  .43  .56  .64 .36  .47  .54 .30  .39  .45 .25  .32  .37  48.75  610 x 610 x 533
          24 x 24 x 21  8  1000  1500  2000  .38  .52  .63 .32  .44  .53 .26  .36  .44 .22  .30  .36  65.00  610 x 610 x 533
          24 x 24 x 21  10  1000  1500  2000  .34  .45  .58 .29  .38  .49 .24  .31  .40 .19  .26  .33  81.25  610 x 610 x 533
          24 x 24 x 25  6  1000  1500  2000  .32  .55  .68 .27  .46  .57 .22  .38  .47  -  -  -  57.41  610 x 610 x 635
          24 x 24 x 25  8  1000  1500  2000  .23  .41  .59 .19  .34  .50 .16  .29  .41  -  -  -  76.55  610 x 610 x 635
          24 x 24 x 25  10  1500  2000  2500  .29  .50   .66  .24  .42  .55 .20  .35  .46  -  -  -  95.69  610 x 610 x 635
          24 x 24 x 29  6  1500  2000  2500  .51  .62  .74 .43  .52  .62 .36  .43  .52  -  -  -  66.08  610 x 610 x 737
          24 x 24 x 29  8  1500  2000  2500  .39  .49  .62 .33  .41  .52 .27  .34  .43 .22  .30  -  88.11  610 x 610 x 737
          24 x 24 x 29  10  1500  2000  2500  .25  .41  .58 .21  .34  .49 .17  .29  .40  -  -  -  110.13  610 x 610 x 737
          24 x 24 x 36  6  1500  2000  2500  .38  .57  .72 .32  .48  .60 .26  .40  .50  -  -  -  81.25  610 x 610 x 914
          24 x 24 x 36  8  1500  2000  2500  .29  .48  .61 .24  .40  .51 .20  .33  .43  -  -  -  108.83  610 x 610 x 914
          24 x 24 x 36  10  1500  2000  2500  .22  .38  .53  .18  .32  .45 .15  .26  .37  -  -  -  135.41  610 x 610 x 914
          20 x 24 x 15  6  850  1050  1250  .50  .62  .74 .42  .52  .62 .35  .43  .52 .29  .35  .42  35.75  508 x 610 x 381
          20 x 24 x 15  8  850   1050   1250   .42  .53  .67 .35  .45  .56 .29  .37  .47 .24  .30  .38  47.66  508 x 610 x 381
          20 x 24 x 15  10  850   1050   1250   .38  .45  .60 .32  .38  .50 .26  .31  .42 .22  .26  .34  59.58  508 x 610 x 381
          20 x 24 x 21  6  850   1050   1250  .43  .56  .64 .36  .47  .54 .30  .39  .45 .25  .32  .37  48.75  508 x 610 x 533
          20 x 24 x 21  8  850   1250   1650  .38  .52  .63 .32  .44  .53 .26  .36  .44 .22  .30  .36  65.00  508 x 610 x 533
          20 x 24 x 21  10  850   1250   1650   .34  .45  .58 .29  .38  .49 .24  .31  .40 .19  .26  .33  81.25  508 x 610 x 533
          20 x 24 x 25  6  850   1250   1650   .32  .55  .68 .27  .46  .57 .22  .38  .47  -  -  -  57.41  508 x 610 x 533
          20 x 24 x 25  8  850   1250   1650   .23  .41  .59 .19  .34  .50 .16  .29  .41  -  -  -  76.55  508 x 610 x 533
          20 x 24 x 25  10  1250   1650   2100  .29  .50   .66  .24  .42  .55 .20  .35  .46  -  -  -  95.69  508 x 610 x 533
          20 x 24 x 29  6  1250   1650   2100   .51  .62  .74 .43  .52  .62 .36  .43  .52  -  -  -  66.08  508 x 610 x 737
          20 x 24 x 29  8  1250   1650   2100   .39  .49  .62 .33  .41  .52 .27  .34  .43  -  -  -  88.11  508 x 610 x 737
          20 x 24 x 29  10  1250   1650   2100   .25  .41  .58 .21  .34  .49 .17  .29  .40  -  -  -  110.13  508 x 610 x 737
          20 x 24 x 36  6  1250   1650   2100   .38  .57  .72 .32  .48  .60 .26  .40  .50  -  -  -  81.25  508 x 610 x 914
          20 x 24 x 36  8  1250   1650   2100   .29  .48  .61 .24  .40  .51 .20  .33  .43  -  -  -  108.83  508 x 610 x 914
          20 x 24 x 36  10  1250  1650  2100  .22  .38  .53 .18  .32  .45 .15  .26  .37  -  -  -  135.41  508 x 610 x 914
          12 x 24 x 15  3  500  625   750  .50  .62  .74 .42  .52  .62 .35  .43  .52 .29  .35  .42  17.87  305 x 610 x 381
          12 x 24 x 15  4  500   625  750  .42  .53  .67 .35  .45  .56 .29  .37  .47 .24  .30  .38  23.83  305 x 610 x 381
          12 x 24 x 15  5  500   625  750  .38  .45  .60 .32  .38  .50 .26  .31  .42 .22  .26  .34  29.79  305 x 610 x 381
          12 x 24 x 15  6  500   625  750  .30  .37  .53 .25  .31  .45 .21  .26  .37 .17  .21  .30  35.75  305 x 610 x 381
          12 x 24 x 21  3  500   625  750  .43  .56  .64 .36  .47  .54 .30  .39  .45 .25  .32  .37  24.37  305 x 610 x 533
          12 x 24 x 21  4  500   750   1000   .38  .52  .63 .32  .44  .53 .26  .36  .44 .22  .30  .36  32.50  305 x 610 x 533
          12 x 24 x 21  5  500   750   1000   .34  .45  .58 .29  .38  .49 .24  .31  .40 .19  .26  .33  40.63  305 x 610 x 533
          12 x 24 x 25  3  500   750   1000  .32  .55  .68 .27  .46  .57 .22  .38  .47  -  -  -  28.70  305 x 610 x 635
          12 x 24 x 25  4  500   750   1000  .23  .41  .59 .19  .34  .50 .16  .29  .41  -  -  -  38.27  305 x 610 x 635
          12 x 24 x 25  5  750   1000   1250   .29  .50   .66  .24  .42  .55 .20  .35  .46  -  -  -  47.84  305 x 610 x 635
          12 x 24 x 29  3  750   1000  1250   .51  .62  .74 .43  .52  .62 .36  .43  .52  -  -  -  33.04  305 x 610 x 737
          12 x 24 x 29  4  750  1000   1250   .39  .49  .62 .33  .41  .52 .27  .34  .43  -  -  -  44.05  305 x 610 x 737
          12 x 24 x 29  5  750   1000   1250   .25  .41  .58 .21  .34  .49 .17  .29  .40  -  -  -  55.07  305 x 610 x 737
          12 x 24 x 36  3  750   1000   1250   .38  .57  .72 .32  .48  .60 .26  .40  .50  -  -  -  40.62  305 x 610 x 914
          12 x 24 x 36  4  750   1000   1250   .29  .48  .61 .24  .40  .51 .20  .33  .43  -  -  -  54.16  305 x 610 x 914
          12 x 24 x 36  5  750   1000   1250   .22  .38  .53 .18  .32  .45 .15  .26  .37  -  -  -  67.70  305 x 610 x 914
          24 x 24 x 12  6  1500  2000  2500  -  -  -  -   -    -  -    -    -  .44  .51  .57   29.25    610 x 610 x 305
          20 x 24 x 12  4  1000  1250  1500  -  -  -  -   -    -  -    -    -  .41  .46  .54   19.50    508 x 610 x 305
          20 x 24 x 12  5  1250   1500  1750  -  -  -  -  -    -  -    -    -  .42  .46  .53   24.37    508 x 610 x 305
          20 x 24 x 12  6  1250  1500  2000  -  -  -  -   -    -  -    -    -  .37  .44  .51   29.25    508 x 610 x 305
          20 x 20 x 12   4  1000  1250  1500  -  -  -  -  -    -  -    -    -  .43  .48  .56   16.50    508 x 508 x 305
          20 x 20 x 12  5  1000  1500   1750  -  -  -  -  -    -  -    -    -  .39  .52  .59   20.62    508 x 508 x 305
          20 x 20 x 12  6  1250  1500   1750  -  -  -  -  -    -  -    -    -  .40  .47  .54   24.75    508 x 508 x 305
          20 x 20 x 21  5  1250  1500   2000  -  -  -  -  -    -  -    -    -  .30  .36  .43   34.63    508 x 508 x 533
          20 x 20 x 21  6  1250  1500   2000  -  -  -  -  -    -  -    -    -  .25  .32  .37   41.25    508 x 508 x 533
          20 x 20 x 21  7  1250  1500   2000   -  -  -  -  -   -  -    -    -  .21  .28  .34   48.63    508 x 508 x 533
          12 x 24 x 12  3  750  1000  1250  -  -  -  -    -    -  -    -    -  .44  .51  .57   14.63    305 x 610 x 305
         Actual size of face dimension is 5/8” less than nominal. Header thickness is 13/16”
         Tolerances shall be +/- 1/8” for height, width and +/- 1” on depth.
         All special sizes will be undersized 1/4” unless specified otherwise.
         Depth of filter is measured from the front of the header to the end of the pocket.
         Recommended final resistance is 1.50” in. w.g.
         Performance values based on ASHRAE and in-house testing methods.
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     Glasfloss has a policy of uninterrupted research, develop ent and product i prove ent and reserves the right to change design and specifications  ithout notice.
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