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Z-PAK FIBERGLASS SERIES
BASE SIZE SIZE RATED INITIAL FINAL MEDIA
MODEL W x H x D W x H x D VELOCITY RESIST. RESIST. SQUARE
W
NUMBER NOMINAL EXACT FPM IN. W .G. IN. G. FEET
BOX HEADER
MERV 15 - 90-95% Efficiency
ZPK242412 24 X 24 X 12 23-3/8 X 23-3/8 X 11-1/2 500 0.59 0.70 1.50 58.33
ZPK122412 12 X 24 X 12 11-3/8 X 23-3/8 X 11-1/2 500 0.59 0.70 1.50 29.17
ZPK202012 20 X 20 X 12 19-3/8 X 19-3/8 X 11-1/2 500 0.59 0.70 1.50 42.66
ZPK202412 20 X 24 X 12 19-3/8 X 23-3/8 X 11-1/2 500 0.59 0.70 1.50 47.40
ZPK252012 25 X 20 X 12 24-3/8 X 19-3/8 X 11-1/2 500 0.59 0.70 1.50 55.78
ZPK24246 24 X 24 X 6 23-3/8 X 23-3/8 X 5-7/8 250 0.31 0.41 1.50 26.39
ZPK12246 12 X 24 X 6 11-3/8 X 23-3/8 X 5-7/8 250 0.31 0.41 1.50 13.20
ZPK20206 20 X 20 X 6 19-3/8 X 19-3/8 X 5-7/8 250 0.31 0.41 1.50 19.30
ZPK20246 20 X 24 X 6 19-3/8 X 23-3/8 X 5-7/8 250 0.31 0.41 1.50 21.45
ZPK25206 25 X 20 X 6 24-3/8 X 19-3/8 X 5-7/8 250 0.31 0.41 1.50 25.24
MERV 13 - 80-85% Efficiency
ZPK242412 24 X 24 X 12 23-3/8 X 23-3/8 X 11-1/2 500 0.48 0.58 1.50 58.33
ZPK122412 12 X 24 X 12 11-3/8 X 23-3/8 X 11-1/2 500 0.48 0.58 1.50 29.17
ZPK202012 20 X 20 X 12 19-3/8 X 19-3/8 X 11-1/2 500 0.48 0.58 1.50 42.66
ZPK202412 20 X 24 X 12 19-3/8 X 23-3/8 X 11-1/2 500 0.48 0.58 1.50 47.40
ZPK252012 25 X 20 X 12 24-3/8 X 19-3/8 X 11-1/2 500 0.48 0.58 1.50 55.78
ZPK24246 24 X 24 X 6 23-3/8 X 23-3/8 X 5-7/8 250 0.26 0.35 1.50 26.39
ZPK12246 12 X 24 X 6 11-3/8 X 23-3/8 X 5-7/8 250 0.26 0.35 1.50 13.20
ZPK20206 20 X 20 X 6 19-3/8 X 19-3/8 X 5-7/8 250 0.26 0.35 1.50 19.30
ZPK20246 20 X 24 X 6 19-3/8 X 23-3/8 X 5-7/8 250 0.26 0.35 1.50 21.45
ZPK25206 25 X 20 X 6 24-3/8 X 19-3/8 X 5-7/8 250 0.26 0.35 1.50 25.24
MERV 11 - 60-65% Efficiency
ZPK242412 24 X 24 X 12 23-3/8 X 23-3/8 X 11-1/2 500 .32 .48 1.50 58.33
ZPK122412 12 X 24 X 12 11-3/8 X 23-3/8 X 11-1/2 500 .32 .48 1.50 29.17
ZPK202012 20 X 20 X 12 19-3/8 X 19-3/8 X 11-1/2 500 .32 .48 1.50 42.66
ZPK202412 20 X 24 X 12 19-3/8 X 23-3/8 X 11-1/2 500 .32 .48 1.50 47.40
ZPK252012 25 X 20 X 12 24-3/8 X 19-3/8 X 11-1/2 500 .32 .48 1.50 55.78
ZPK24246 24 X 24 X 6 23-3/8 X 23-3/8 X 5-7/8 250 .21 .28 1.50 26.39
ZPK12246 12 X 24 X 6 11-3/8 X 23-3/8 X 5-7/8 250 .21 .28 1.50 13.20
ZPK20206 20 X 20 X 6 19-3/8 X 19-3/8 X 5-7/8 250 .21 .28 1.50 19.30
ZPK20246 20 X 24 X 6 19-3/8 X 23-3/8 X 5-7/8 250 .21 .28 1.50 21.45
ZPK25206 25 X 20 X 6 24-3/8 X 19-3/8 X 5-7/8 250 .21 .28 1.50 25.24
MERV 9 - 40-45% Efficiency
ZPK242412 24 X 24 X 12 23-3/8 X 23-3/8 X 11-1/2 500 .22 .27 1.50 58.33
ZPK122412 12 X 24 X 12 11-3/8 X 23-3/8 X 11-1/2 500 .22 .27 1.50 29.17
ZPK202012 20 X 20 X 12 19-3/8 X 19-3/8 X 11-1/2 500 .22 .27 1.50 42.66
ZPK202412 20 X 24 X 12 19-3/8 X 23-3/8 X 11-1/2 500 .22 .27 1.50 47.40
ZPK252012 25 X 20 X 12 24-3/8 X 19-3/8 X 11-1/2 500 .22 .27 1.50 55.78
ZPK24246 24 X 24 X 6 23-3/8 X 23-3/8 X 5-7/8 250 .13 .18 1.50 26.39
ZPK12246 12 X 24 X 6 11-3/8 X 23-3/8 X 5-7/8 250 .13 .18 1.50 13.20
ZPK20206 20 X 20 X 6 19-3/8 X 19-3/8 X 5-7/8 250 .13 .18 1.50 19.30
ZPK20246 20 X 24 X 6 19-3/8 X 23-3/8 X 5-7/8 250 .13 .18 1.50 21.45
ZPK25206 25 X 20 X 6 24-3/8 X 19-3/8 X 5-7/8 250 .13 .18 1.50 25.24
Tolerances shall be +/- 1/16” for width and height. The frame depth shall not exceed 5-7/8” and 11-1/2”. All special sizes will be undersized 1/4” unless specified
otherwise. Header thickness shall be 13/16”. Performance values based on ASHRAE and in-house testing methods.
STANDARD PRESSURE DROP MINIMUM PARTICLE SIZE EFFICIENCY
Test Filter Size 24" x 24" x 12" Nominal Test Filter Size 24" x 24" x 12" Nominal

.G. 1.0 100
RESISTANCE IN. W 0.8 BOX STYLE REMOVAL PERCENTAGE 60
80
0.6
0.4
40
0.2
20
0
350
300
450
250
400
1
W
AIR FLO RATE, (FPM) 500 0 .1 PARTICLE SIZE, MICRONS 10
40-45% 60-65% 80-85% 90-95% 40-45% 60-65% 80-85% 90-95%
MERV 9 MERV 11 MERV 13 MERV 14/15 MERV 9 MERV 11 MERV 13 MERV 14/15
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