Air flow resistance calculation Hot air ducting
In order to ensure a correct application with correct air ducting system, a continuous main line with openings that cannot be closed must be ensured. When branches are used, the lines branching off the main line are not taken into account. As a result, the branches can also be designed in a way to be closed. The following table lists several air ducting parts. The sum of resistance points must not exceed the maximum number of resistance points for each air heating model.
Air Top 2000 STC (325 P)
Air Top Evo 40 (550 P) / Air Top Evo 55 (375 P)
60 mm inlet
90 mm inlet
Dim. in mm
Id.
Dim. in mm
Id.
Intake grill / grille
60
1320163
90
1310581
Flexible tubing per meter
60
various
90
various
Elbow in flexible tube
60
various
90
various
Reducing adapter
–
–
90 >80
1320925
Hose connector
60
1320469
90
1319869
Elbow in flexible tube
–
–
–
–
–
–
90
1320706
Branch
60 / 60 / 60
1320472
90 / 60 / 90
1320707
D2a
D1a
D1a
L
–
–
80 / 55 / 55
1320753
Y-piece
–
–
80 / 60 / 60
1320471
–
–
90 / 90 / 90
1320470
40
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