Engineering Bulletin

406 18" Baseboard Diffuser (Page 8)
Face Velocity
300
400
500
600
700
800
Pressure Loss
.013
.022
.035
.048
.067
.088
Ak .26
cfm
Spread
Throw
80
4.5
5
105
6.5
7
130
7.5
8
155
8.5
9
180
9.5
10
210
11
11
Terminal velocity of 50 fpm.
462 & 464 Baseboard Diffusers (Page 8, 9)
Airflow (cfm)
300
400
500
600
700
800
2 Feet
27 sq. in.
Ak .187
CFM
Spread
Throw
Press. loss
55
6.5
7
.009
75
7.5
8
.017
95
8
9.5
.029
110
8.5
10.5
.038
130
9
12
.054
150
11
13
.072
4 Feet
54 sq. in.
Ak .375
CFM
Spread
Throw
Press. loss
110
12
7.5
.031
150
15
9
.058
185
17.5
10
.090
225
19
11.5
.124
260
20
12.5
.178
300
21
13.5
.224
Terminal velocity of 50 fpm.
472 & 474 Baseboard Return (Page 8, 9)
Face Velocity
300
400
500
600
700
2 Feet
Ak .325
cfm
Ps
100
.010
130
.028
165
.046
195
.064
230
.090
4 Feet
Ak .65
cfm
Ps
195
.015
260
.026
325
.040
390
.060
455
.078
Velocity measured on the face.
654, 655 Baseboard/Sidewall Registers
(Page 9, 10)
Face Velocity
300
400
500
600
700
800
900
1000
Pressure Loss
.006
.010
.016
.022
.031
.040
.050
.062
8x4
Ak .11
cfm
Throw
33
6
44
8
55
10
66
12
77
14
88
16
100
18
110
20
10x4
12x4, 8x6
Ak .135
cfm
Throw
40
6.5
54
8.5
67
10.5
80
12.5
95
15
110
17. 5
120
19
135
21
Ak .18
cfm
Throw
55
7.5
72
10
90
12.5
108
15
125
17. 5
145
20.5
162
23
180
25
10x6
Ak .23
cfm
Throw
70
9
92
11.5
115
14.5
140
17. 5
160
20
185
23
205
25.5
230
29
12x6
Ak .29
cfm
Throw
85
10
115
13
145
17
17 5
20
205
23.5
230
26.5
260
30
290
33
14x6
Ak .34
cfm
Throw
102
11
135
14.5
17 0
18
205
22
240
25.5
270
29
305
32.5
340
36
Terminal Velocity of 75 fpm
657/658 Baseboard Return Grille (Page 10)
664 Baseboard Register (Page 11)
Face Velocity
300
400
500
600
700
800
900
1000
Pressure Loss
.006
.010
.016
.022
.031
.040
.050
.062
8x6
Ak .18
cfm
Throw
55
5.5
70
7
90
9
110
10.5
125
12.5
145
14
160
16
180
18
10x6 & 12x5
Ak .245
cfm
Throw
75
6
100
8
125
10
145
12
170
14
195
16
220
18
245
20
14x6
Ak .36
cfm
Throw
110
7
145
9.5
180
12
215
14
252
16.5
290
19
325
21.5
360
24
12x8
Ak .425
cfm
Throw
130
7.5
170
10
215
12.5
255
15
300
18
340
20.5
385
23
425
25.5
Terminal Velocity of 75 fpm
Engineering Data
Engineering Data
106
Face Velocity 300 400 500 600 700 800 900 1000
15" cfm 48 63 79 95 111 127 143 159
Ak=0.159 PS 0.005 0.009 0.014 0.020 0.027 0.035 0.044 0.053
Throw 50 5.5 7.5 9 11 13 14.5 16.5 18.5
Spread fpm 5.5 7.5 9.5 11.5 13.5 15 17 19
Throw 100 3 3.5 4.5 5.5 6.5 7.5 8.5 9
Spread fpm 3 3.5 4.5 5.5 6.5 7.5 9 9.5
Throw 150 2 2.5 3 3.5 4.5 5 5.5 6
Spread fpm 2 2.5 3 3.5 4.5 5 5.5 6
406 15" Baseboard Diffuser (Page 8)