Webasto 1320760A hot air duct reducer 90/60 mm - for Air Top Evo 40/55 and Air Top 2000 STC heaters
- Genuine Webasto 1320760A reducer for hot air ducting: connects 90 mm system parts to a 60 mm flexible duct. Length 59 mm, black plastic. For Air Top Evo 40/55 and Air Top 2000 STC air heaters.
The Webasto 1320760A is a genuine reducer (listed by Webasto as an extension adapter) for the hot air ducting system. The side with a 90 mm inner diameter connects to 90 mm ducting system parts, and a 60 mm flexible duct fits over the side with a 60 mm outer diameter. This lets you run a narrower 60 mm duct from a 90 mm main line, e.g. to an air outlet in a smaller space.

What it is for
- transition from a 90 mm ducting system to a 60 mm flexible duct
- 90 mm side: 90 mm inner diameter, connects to 90 mm system parts in combination with the Webasto 1320468A union nut
- 60 mm side: 60 mm outer diameter, for a 60 mm flexible duct
- listed in the Webasto catalogue for Air Top 2000 STC and Air Top Evo 40/55 air heaters

Air flow resistance
- in the Webasto resistance calculation the 90 > 60 mm reducer counts as 211 points
- the sum of points of the main line must not exceed the heater maximum: 550 points for Air Top Evo 40 and 375 points for Air Top Evo 55
- lines branching off the main line are not counted, so the reducer is best used on branch lines
- if the limit is exceeded, the heater switches to control pause and does not run continuously

Material
- black plastic
- Webasto ducting parts are made of PA6.6 GF30 glass fibre reinforced plastic
- system temperature resistance from -40 to +140°C
- Webasto is not liable for installations with non-Webasto ducting parts, especially parts without guaranteed high temperature resistance


Related products
- Y-piece 90 x 90 x 90 mm Webasto 1320470A
- Y-piece 90 x 60 x 90 mm
- Insulated hot air duct 60 mm
- Insulated hot air duct 90 mm
Technical data
| Parameter | Value |
|---|---|
| Manufacturer | Webasto |
| Manufacturer part number | 1320760A |
| Former part number | 9011011C |
| EAN | 4054037049699 |
| Type | hot air duct reducer (extension adapter) |
| Inner diameter of the larger side (D1i) | 90 mm |
| Outer diameter of the smaller side (D2a) | 60 mm |
| Length (L) | 59 mm |
| Connection on the 90 mm side | with Webasto 1320468A union nut |
| Material | plastic |
| Colour | black |
| Air flow resistance (90 > 60 mm) | 211 points |
| Heaters | Air Top 2000 STC, Air Top Evo 40, Air Top Evo 55 |
| Contents | 1 pc. |
Questions and answers
Which heaters does the reducer fit?
The Webasto catalogue lists the 1320760A reducer for the hot air ducting systems of the Air Top 2000 STC, Air Top Evo 40 and Air Top Evo 55 heaters.
How is it installed?
The side with a 90 mm inner diameter connects to 90 mm ducting system parts in combination with the Webasto 1320468A union nut. A 60 mm flexible duct fits over the side with a 60 mm outer diameter.
Does the reducer restrict the air flow?
Yes. According to Webasto the 90 > 60 mm reducer counts as 211 resistance points. The sum of points of the main line must not exceed 550 for Air Top Evo 40 and 375 for Air Top Evo 55. Lines branching off the main line are not counted.
What is it made of?
Black plastic. Webasto ducting parts are made of PA6.6 GF30 glass fibre reinforced plastic, resistant to temperatures from -40 to +140°C.
Can I combine it with ducting from other brands?
Webasto is not liable for installations with non-Webasto ducting parts, especially parts without guaranteed high temperature resistance.
Manufacturer
Webasto SE, Kraillinger Straße 5, 82131 Stockdorf, Germany.












