Webasto RV Catalog 2025-26 EN

Hot air system Advantages and features

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.

Webasto offers a wide range of components for air distribution with high flexibility to fit any application. 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

Air Top 2000 STC: 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

Dim. in mm

Points

Id.

Id.

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

52

53

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