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The Truma Gen2 Comfort Levelling Frame Adaptor (Part No. 40900-08) is a genuine Truma installation accessory designed for mounting Truma Aventa Gen2 roof-mounted air conditioning units onto panel vans with ribbed or uneven roofs.
Many campervan roofs are not completely flat due to reinforcing ribs. This adaptor frame compensates for those roof contours, creating a level mounting surface for the air conditioner sealing frame and ensuring the roof air conditioning unit can be installed securely and sealed correctly.
The levelling frame is typically used in panel van conversions such as the Fiat Ducato, Peugeot Boxer, Citroën Jumper, Mercedes-Benz Sprinter and VW Crafter, helping installers achieve a stable and watertight installation for Truma Aventa air conditioning systems.
Original Truma installation accessory – Part No. 40900-08.
Designed for Truma Aventa Comfort Gen2 roof air conditioners.
Compensates for ribbed or uneven vehicle roofs.
Ensures correct sealing and level installation of the air conditioner.
Ideal for campervan and panel van conversions.
This adaptor frame helps maintain the proper seal between the air conditioner and vehicle roof, preventing leaks and ensuring long-term system reliability.
Levelling adaptor frame for Truma Aventa Gen2 air conditioners
Designed for ribbed or corrugated vehicle roofs
Provides flat installation surface for the sealing frame
Suitable for panel van camper conversions
Genuine Truma part number 40900-08
| Specification | Details |
|---|---|
| Product Name | Truma Gen2 Comfort Levelling Frame Adaptor |
| Original Part Number | 40900-08 |
| Manufacturer | Truma |
| Product Type | Air conditioner installation adaptor frame |
| Compatible Systems | Truma Aventa Comfort Gen2 |
| Application | Roof air conditioner installation |
| Suitable Vehicles | Panel vans / campervan conversions |
| Roof Cut-Out Compatibility | 380 × 350 mm or 400 × 400 mm openings |
| Vehicle Type | Campervan, motorhome |
| Product Weight | Approx. 0.45 kg |
The Truma Gen2 Comfort Levelling Frame Adaptor (40900-08) is installed between the vehicle roof and the Truma Aventa air conditioner sealing frame.
Prepare the roof cut-out opening according to the air conditioner installation dimensions.
Position the levelling frame adaptor on the vehicle roof, aligning it with the roof opening.
Ensure the frame fills the gaps created by the roof ribs or contours.
Place the standard Truma sealing frame on top of the adaptor.
Install the Truma Aventa Gen2 air conditioning unit onto the sealing frame.
Secure the internal mounting frame and tighten according to Truma installation instructions.
The levelling adaptor ensures the air conditioner sits flat and evenly on ribbed van roofs, which is essential for proper sealing and vibration control.
Installation is normally performed during campervan conversions or air conditioner upgrades and should be carried out by a qualified installer or experienced technician.
Truma Gen2 Comfort Levelling Frame Adaptor – Part No. 40900-08
Foam sealing profile
Sealing profile for the frame
Non-slip mounting pads
(Roof air conditioner, sealing frame and installation hardware may be supplied separately depending on the system.)
When installing a Truma Aventa Gen2 roof air conditioner on a ribbed van roof, the Truma Gen2 Comfort Levelling Frame Adaptor (40900-08) ensures the air conditioner sits perfectly level and sealed. By compensating for uneven roof panels, it helps prevent water leaks, improves installation stability and ensures the air conditioning system operates reliably in your campervan or motorhome
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