Heki 3, Midi Heki & Midi Heki FL: Differences, dimensions & retrofitting

Heki 3, Midi Heki Difference: The most important differences at a glance

The term "Heki 3 Midi Heki difference" frequently comes up when discussing the selection or retrofitting of roof windows in motorhomes. But what are the real differences between the Heki 3, Midi Heki, and Midi Heki FL? This article provides a detailed overview of the technology, dimensions, and retrofit options – based on practical experience and from the perspective of discerning motorhome owners.

What are Heki 3, Midi Heki and Midi Heki FL?

All three models are from Dometic and are among the most commonly installed roof windows in high-quality motorhomes. However, they differ significantly in design, size, and features:

• Heki 3: Large, tiltable roof window with crank mechanism, known for plenty of light and good ventilation.
• Midi HekiMore compact than Heki 3, usually with lever operation, offers solid basic equipment for mid-range and premium models.
• Midi Heki FL: Further development of the Midi Heki, with a flatter design (FL = Flat Line), is well suited for more modern vehicle roofs and offers optimized aerodynamics.

Dimensions and technical differences between Heki 3 and Midi Heki

The biggest differences lie in the dimensions and operation. For retrofitting or replacement, you should be aware of these dimensions and special features:

As you can see, the Heki 3 is significantly larger, while the Midi Heki and Midi Heki FL have identical cutout dimensions but slight differences in external dimensions and height. The Heki 3 is operated by a crank, while both Midi Heki models use a lever.

Retrofit options: Electrically retrofit Heki 3, Midi Heki and Midi Heki FL

Motorhome owners have a strong desire for greater comfort – especially when it comes to opening and closing the roof window. Special accessories are available for the Heki 3, Midi Heki, and Midi Heki FL. Electric roof window drives for retrofitting. These enable convenient control at the touch of a button and increase both comfort and safety on the go.

• Retrofitting Heki 3 with electric windows: Specially developed drives replace the hand crank; installation is easy in many cases.
• Retrofitting Midi Heki & Midi Heki FL with electric power: Suitable motor solutions are available for both models, and these can usually be installed without much effort.

A precise Installation instructions for the roof window drive You can find them on our website. Alternatively, you can visit our Network of qualified installation partners fall back on this if you do not wish to carry out the retrofit yourself.

Which roof window model is suitable for which vehicles?

The choice between Heki 3, Midi Heki and Midi Heki FL depends on the desired amount of light, the available cutout and individual comfort requirements:

• Heki 3: Frequently installed in premium motorhomes (Carthago, Concorde, Morelo) when maximum light output and comfort are required.
• Midi Heki: A classic all-rounder, suitable for many mid-range and upper-class motorhomes and campers.
• Midi Heki FL: Especially suitable for modern vehicle bodies and vehicles with a focus on aerodynamics.

If you are interested in retrofitting an electric drive, please note the following: Information on research and development of our products. Our solutions are designed for long-lasting use in premium vehicles and are manufactured in cooperation with the Ravensburg-Weingarten University of Applied Sciences.

Practical tip: What you should pay attention to when retrofitting

Before retrofitting, you should determine the exact model and dimensions of your roof window. Check whether accessories such as blackout blinds and mosquito nets will still function. For complex modifications or if you have any uncertainties, we recommend installation by a specialist company – our Partner network We will gladly assist you.

You can find more practical tips on retrofitting and installation in the article Roof window drive: Easy to install and retrofit.

More information for motorhome owners

Are you interested in other technical topics related to your motorhome? Then you might also like our article. The difference between semi-integrated and fully integrated motorhomes It might be exciting for you.

FAQ: Heki 3, Midi Heki Difference and Retrofitting

• What is the difference between Heki 3 and Midi Heki?
  The Heki 3 is significantly larger, is operated by a crank and offers more light, while the Midi Heki is more compact and is usually opened with a lever.
• Can I retrofit my Midi Heki or Heki 3 with electric power?
  Yes, there are electric retrofit drives available for both models, specifically designed for the respective window type.
• How can I tell which type of skylight I have?
  The model designation is usually found on the frame or in the vehicle's documentation. Dimensions and operating instructions also help with identification.
• Is it worth retrofitting an electric roof window drive?
  Retrofitting is usually worthwhile for greater comfort and ease of use, especially with regular use. If you are unsure, you should consult a specialist.