E.C.A. Proteus Plus - Restrictor Specifications for Concentric Ducts

Room Sealed Fan Assisted Operation
Table 5 The restrictors for 60/100 mm concentric ducts
(mm)
In the use of 80/125 mm concentric ducts,
- up to 2 m length, the same restrictors (shown in Table 5) should be used
- between 2m and 8m, no restrictor should be used.
a)
b)
c)
Sample connections by 60/100 mm vertical concentric ducts
fig. 17
18
Product
Elbow
L (m)
L
max
(m)
restrictor
PRP 24 HM
1x90
0
≤ 1
3
 47
1x90
0
1< ≤ 2
 49
0
1x90
2< ≤ 3
-
2x90
0
≤ 1
2
 49
2x90
0
1< ≤ 2
-
3x90
0
≤ 1
1
-