Page 17
ACCESSORY AIR RESISTANCE
Total Resistance (inches water gauge)
Unit
Air
RTD11 StepDown Diffuser
Model
No.
Volume
(cfm)
Wet
Evaporator
Coil
REMD16M
Downflo
Economizer
EMDH16M
Horizontal
Economizer
2 Ends
Open
1 Side
2 Ends
Open
All Ends
& Sides
Open
FD11
Flush
Diffuser
2400 .12 .03 .03 .21 .18 .15 .14
2600 .13 .04 .04 .24 .21 .18 .17
2800 .14 .04 .04 .27 .24 .21 .20
GCS16823
3000 .16 .05 .05 .32 .29 .25 .25
GCS16953
3200 .18 .05 .05 .41 .37 .32 .31
3400 .19 .06 .06 .50 .45 .39 .37
3600 .21 .06 .06 .61 .54 .48 .44
3800 .23 .07 .07 .73 .63 .57 .51
3600 .12 .03 .03 .36 .28 .23 .15
3800 .13 .04 .04 .40 .32 .26 .18
4000 .14 .04 .04 .44 .36 .29 .21
4200 .15 .05 .05 .49 .40 .33 .24
GCS161353
4400 .16 .05 .05 .54 .44 .37 .27
4600 .17 .06 .06 .60 .49 .42 .31
4800 .18 .07 .07 .65 .53 .46 .35
5000 .19 .09 .09 .69 .58 .50 .39
5200 .20 .10 .10 .75 .62 .54 .43
4200 .10 .06 .06 .22 .19 .16 .10
4400 .11 .07 .07 .28 .24 .20 .12
4600 .12 .07 .07 .34 .29 .24 .15
4800 .13 .08 .08 .40 .34 .29 .19
GCS161603
5000 .14 .08 .08 .46 .39 .34 .23
5200 .15 .09 .09 .52 .44 .39 .27
5400 .16 .10 .10 .58 .49 .43 .31
5600 .17 .12 .12 .64 .54 .47 .35
5800 .18 .13 .13 .70 .59 .51 .39
5000 .07 .11 .51 .44 .39 .27
5200 .08 .12 .56 .48 .42 .30
5400 .09 .13 .61 .52 .45 .33
5600 .10 .14 .66 .56 .48 .36
5800 .11 .15 .71 .59 .51 .39
6000 .12 .16 .76 .63 .55 .42
6200 .13 .17 .80 .68 .59 .46
GCS161853
6400 .14 .18 .86 .72 .63 .50
6600 .15 .20 .92 .77 .67 .54
6800 .16 .22 .99 .83 .72 .58
7000 .17 .23 1.03 .87 .76 .62
7200 .18 .24 1.09 .92 .80 .66
7400 .19 .25 1.15 .97 .84 .70
7600 .20 .26 1.20 1.02 .88 .74
6000 .06 .01 .36 .31 .27 .29
6500 .07 .02 .42 .36 .31 .34
7000 .08 .02 .49 .41 .36 .40
7500 .09 .04 .51 .46 .41 .45
GCS162753
8000 .10 .06 .59 .49 .43 .50
GCS163003
8500 .11 .08 .69 .58 .50 .57
9000 .12 .10 .79 .67 .58 .66
9500 .13 .12 .89 .75 .65 .74
10,000 .15 .14 1.00 .84 .73 .81