Hot air system Advantages and features
Hot air system Air flow resistance calculation
Webasto offers a wide range of components for air distribution with high flexibility to fit any application.
To ensure correct application with the correct air-distribution system, it is important to have a continuous main line with openings that cannot be closed. The sum of the resistance points of the main line must not exceed the maximum number of resistance points for each air heater model. Lines branching off from the main line are not taken into account. Consequently, the branches can also be designed with closable outlets. In the following table, several air ducting parts are listed. Exceeding the number of points (excessive air resistance of the heating air system) is detected by the heater after starting. For safety reasons, continuous-heating operation is then no longer possible and the heater switches to control pause. Air Top 2000 STC / Air Top Pro 25 / Air Top Go 20: max. 325 resistance points Air Top Evo 40: max. 550 resistance points Air Top Evo 55: max. 375 resistance points 55/60 mm inlet 80/90 mm inlet Dim. in mm Points Id. Dim. in mm Points Id.
The advantages: ■ Full range of mounting parts needed for any application ■ Multiple combination possibilities to suit any application ■ Coloured air outlets, black, white, grey and brown fitting to any interior ■ Fast and easy installation, also in small spaces ■ High temperature resistance from -40 °C up to +140 °C with PA6.6 GF30 glass fibre reinforced synthetic material
60
24
1320163A
90
65
1310581A
Intake grill / grille
55
30
various
80
27
various
Flexible tubing per meter
60
27
various
90
25
various
55
10
various
80
7
various
Additional points for elbow in flexible tube
60
8
various
90
6
various
–
–
–
90
24
1321734A
Air ducting silencer
–
–
–
90
16
1320996A
–
–
–
90 > 80
45
1320186A
Reducing adapter air intake
Webasto is not liable for applications made with non-Webasto air ducting parts, especially for parts not guaranteeing high temperature resistance.
60 > 55
27
1320127A
80 > 55
223
1319477A
Reducing adapter
–
–
–
90 > 60
211
1320760A
–
–
–
90 > 80
45
1320185A
–
–
–
90 > 80
45
1320925A
55
12
1319473A
80
5
1319476A
Hose connector
60
10
1320469A
90
5
1319869A
54
55
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