Page 10
BLOWER DATA
CEILING DIFFUSERS AIR RESISTANCE - in. w.g.
RTD11 Step-Down Diffuser
FD11 Flush
Diffuser
Unit Size
Air Volume
cfm
2 Ends Open
1 Side, 2 Ends
Open
All Ends & Sides
Open
092 Models
2400
0.21
0.18
0.15
0.14
2600
0.24
0.21
0.18
0.17
2800
0.27
0.24
0.21
0.20
3000
0.32
0.29
0.25
0.25
3200
0.41
0.37
0.32
0.31
3400
0.50
0.45
0.39
0.37
3600
0.61
0.54
0.48
0.44
3800
0.73
0.63
0.57
0.51
102 & 120 Models
3600
0.36
0.28
0.23
0.15
3800
0.40
0.32
0.26
0.18
4000
0.44
0.36
0.29
0.21
4200
0.49
0.40
0.33
0.24
4400
0.54
0.44
0.37
0.27
4600
0.60
0.49
0.42
0.31
4800
0.65
0.53
0.46
0.35
5000
0.69
0.58
0.50
0.39
5200
0.75
0.62
0.54
0.43
CEILING DIFFUSER AIR THROW DATA
Model No.
Air Volume
1
Effective Throw Range
RTD11 Step-Down
FD11 Flush
cfm
ft.
ft.
092 Models
2600
24 - 29
19 - 24
2800
25 - 30
20 - 28
3000
27 - 33
21 - 29
3200
28 - 35
22 - 29
3400
30 - 37
22 - 30
102, 120
Models
3600
25 - 33
22 - 29
3800
27 - 35
22 - 30
4000
29- 37
24 - 33
4200
32 - 40
26 - 35
4400
34 - 42
28 - 37
1
Throw is the horizontal or vertical distance an air stream travels on leaving the outlet or diffuser
before the maximum velocity is reduced to 50 ft. per minute. Four sides open.
