Flettner Slimline Conversion Kit – Stainless Steel Roof Ventilator Adapter

Would you like to replace an existing Flettner 2000 or TCX-2 roof ventilator with a Flettner Slimline LPV without unnecessarily cutting a new hole in your vehicle roof? The Flettner Slimline Conversion Kit allows a suitable existing roof opening to be reused for installing a Slimline roof ventilator.

This original Flettner conversion kit is available in two versions: standard base and narrow base. Choose the version that corresponds to the existing ventilator installation.

One common reason for converting to a Slimline is the installation of a roof rack, solar panels or other roof equipment. The Slimline LPV has a lower profile than conventional Flettner roof ventilators, making it a practical option where available roof space is limited.

The kit contains stainless steel mounting components and the appropriate conversion parts. The Flettner Slimline LPV roof ventilator is sold separately.

Benefits of the Flettner Slimline Conversion Kit

• Reuse the existing opening: avoid unnecessary additional roof cut-outs.
• Designed for existing Flettner systems: convert suitable Flettner 2000 and TCX-2 installations.
• Two versions available: standard base or narrow base.
• More roof equipment options: the lower Slimline profile may provide additional clearance.
• Stainless steel construction: strong and durable mounting components.
• Original Flettner accessory: designed specifically for the Slimline LPV.
• Efficient conversion: suitable existing openings can be reused without additional cutting or drilling according to Flettner.
• Vehicle applications: suitable for compatible vans, motorhomes, trucks and enclosed trailers.

Replace a Flettner 2000 or TCX-2 with a Slimline LPV

Traditional Flettner roof ventilators provide wind-powered ventilation, but their height can sometimes interfere with roof racks or other vehicle roof accessories.

The Slimline Conversion Kit allows an existing compatible Flettner ventilator to be removed and replaced with the lower-profile Slimline LPV.

When the roof opening and mounting conditions are suitable, the original opening can be reused without making another hole in the vehicle roof.

Important: a Slimline roof ventilator still needs sufficient clearance for its rotor to turn freely.

Typical applications

• Roof rack installation: when the original ventilator obstructs the rack.
• Solar panel installation: when roof equipment is rearranged.
• Vehicle conversion: upgrading an existing ventilation arrangement.
• Campervan modifications: when a lower roof ventilator profile is needed.
• Ventilation upgrade: replacing a compatible Flettner 2000 or TCX-2 with a Slimline LPV.

Which version do you need?

The Flettner Slimline Conversion Kit is available for two different mounting base configurations. Always identify the existing ventilator base before ordering.

Please note: the standard and narrow base kits are different versions. They are not automatically interchangeable. Check the original opening and the relevant installation guide.

Standard Base – existing opening up to Ø105 mm

According to Flettner, the Standard Base Conversion Kit is intended for compatible existing roof openings up to 105 mm in diameter.

It is suitable for certain Flettner 2000 and TCX-2 installations with a standard mounting base.

An opening smaller than Ø105 mm is not automatically compatible. The complete roof structure and fixing arrangement must also meet the installation requirements.

Narrow Base – TCX-2 Narrow Base

The Narrow Base Conversion Kit is designed for existing Flettner TCX-2 roof ventilators with a narrow mounting base.

This version is particularly useful for vehicles with ribbed roofs where there is limited flat space between the ribs.

The Ø105 mm maximum stated for the standard base must not be applied automatically to the narrow version.

Check the clearance around the Slimline rotor

Although the Flettner Slimline has a lower profile, the rotor must still rotate freely.

• Check clearance from roof ribs and raised roof sections.
• Make sure the entire rotor has sufficient space.
• Consider nearby roof racks and solar panels.
• Check the correct mounting position.
• Ensure that the internal shutter remains accessible.

For the standard base conversion kit, Flettner describes an included black riser as an alternative to the flat outer plate when a raised roof section would otherwise obstruct the rotor.

Stainless steel construction and sealing

The main conversion plates are made from high-quality stainless steel.

They provide the mounting interface between the vehicle roof and the new Slimline LPV.

For a reliable weather-resistant installation, Flettner recommends a suitable water-resistant adhesive or sealant.

A compatible MS polymer sealant may be used, provided it meets the material and installation requirements.

• Thoroughly clean the mounting surface.
• Position the supplied gaskets correctly.
• Use sealant suitable for exterior vehicle applications.
• Protect exposed metal from corrosion.
• Tighten the fixings evenly without distortion.
• Check for water ingress after installation.

Technical specifications

• Brand: Flettner
• Product: Slimline Converter
• Category: roof ventilator conversion kit
• Material: stainless steel
• Versions: standard base and narrow base
• Standard part number: I-CP-COM-STD
• Narrow part number: I-CP-COM-NAR
• Standard manufacturer reference: CP-COM-GA-101-01
• Narrow manufacturer reference: CP-COM-GA-201-01
• Dimensions: 170 × 150 × 30 mm
• Maximum standard base opening: Ø105 mm
• Narrow base opening: compatible TCX-2 Narrow Base cut-out
• Standard packaged gross weight: 531 g
• Narrow packaged gross weight: 388 g
• Compatible new ventilator: Flettner Slimline LPV
• Electrical supply: not required
• Recommended sealing: water-resistant sealant

Installation guide – overview

Always follow the official Flettner installation instructions for your specific version. The steps below describe the general procedure for the standard base version.

1. Identify the base: determine whether the existing ventilator uses a standard or narrow base.
2. Measure the opening: compare the roof cut-out with the kit requirements.
3. Check rotor clearance: test-fit the Slimline and conversion components.
4. Select the mounting arrangement: for the standard version, choose the flat plate or specified riser as appropriate.
5. Work safely: use suitable tools, gloves and eye protection.
6. Remove the original ventilator: follow the manufacturer's dismantling instructions.
7. Remove old sealant: carefully remove adhesive and sealing residues.
8. Clean the roof: prepare a clean mounting surface.
9. Inspect roof edges: remove burrs and protect exposed metal.
10. Position the first gasket: centre it on the existing opening as instructed.
11. Install the outer converter: position the flat stainless steel plate or specified riser.
12. Apply sealant: use an appropriate water-resistant product.
13. Prepare the Slimline: check the gasket beneath the ventilator base.
14. Position the Slimline: install it over the converter.
15. Align fixing holes: check the four mounting positions.
16. Install the inner gasket: centre it on the inside of the roof.
17. Fit the inner plate: ensure the correct orientation.
18. Insert the screws: initially hand-tighten all four fixing screws.
19. Tighten evenly: the standard kit instructions specify a 3 mm Allen key.
20. Do not overtighten: excessive force can prevent the rotor from turning freely.
21. Test the rotor: confirm free rotation and secure mounting.
22. Inspect the seal: carry out an appropriate water ingress check.
23. Check the internal shutter: keep it open when the ventilator is operating.

What's included?

According to the official instructions, the standard base version includes:

• 1 × flat stainless steel converter plate
• 1 × marked stainless steel inner plate
• 1 × black converter riser
• 2 × matching converter gaskets
• 4 × converter fixing screws

Contents and installation details may vary between versions. Check the corresponding manufacturer's documentation for the narrow base kit.

Not included: the Flettner Slimline LPV roof ventilator. Suitable sealant is recommended but has not been confirmed as included.

Suitable vehicle applications

• Vans and commercial vehicles
• Service vehicles and mobile workshops
• Motorhomes and campervans
• Enclosed trailers
• Trucks with compatible roof structures
• Vehicles with existing Flettner 2000 or TCX-2 roof ventilators

Frequently asked questions

What does the Flettner Slimline Conversion Kit do?
It allows a compatible Flettner 2000 or TCX-2 to be replaced with a Slimline LPV while reusing the existing roof opening.

Is the Slimline ventilator included?
No. The Flettner Slimline LPV must be purchased separately.

Which versions are available?
Standard Base (I-CP-COM-STD) and Narrow Base (I-CP-COM-NAR).

What is the maximum roof opening?
For the standard version, up to Ø105 mm. The narrow version must match the TCX-2 Narrow Base opening.

Will I need to cut a new hole?
For suitable existing installations, the kit is designed to avoid additional cutting or drilling. Always check the manufacturer's instructions.

Is this useful when installing a roof rack?
Yes. The lower Slimline profile may offer more clearance, although the rotor must still rotate freely.

Are the plates stainless steel?
Yes. The main converter plates are made from stainless steel.

Are gaskets included?
The standard version includes two gaskets according to its installation guide.

Is extra sealant required?
Flettner recommends suitable water-resistant adhesive or sealant.

Does the kit need electricity?
No. The Slimline LPV is a wind-powered roof ventilator.

Can I use the standard kit for a narrow base?
Not without confirming mounting compatibility. The versions have different applications.

What if the rotor does not turn freely?
Check the installation position and fixing tension. The standard version may require the specified riser.

Can I close the old opening instead?
Yes. Separate Flettner stainless steel blanking plate kits are available for this purpose.