Relevant devices
3990-Axx, 3990-Bxx, 4791-Axx, 4791-B.xxx
FELLER retrofit
3990 and 4791 devices from FELLER are still installed in many existing KNX buildings. DIVUS checks whether the existing installation situation can remain in use and which DIVUS replacement device fits mechanically, electrically and functionally.
- FELLER
- Retrofit
- KNX
- 3990-Axx
- 3990-Bxx
- 4791-Axx
- 4791-B.xxx
SEO device matrix
Indexable device list for retrofit replacement
This list is rendered as real text, not only inside the image. Google and customers can therefore match searches such as GIRA Control 9 replacement device, JUNG PCT replacement, FELLER 3990 retrofit or MERTEN MEG6260 replacement.
| Manufacturer | Existing device | Installation | DIVUS replacement device | DIVUS article code |
|---|---|---|---|---|
| FELLER | 3990-Axx, 3990-Bxx | Surface-mounted | KNX IQ 08 | KNX-IQ08 |
| FELLER | 4791-Axx, 4791-B.xxx | Surface-mounted | KNX IQ 08 | KNX-IQ08 |
The exact compatibility is always checked project by project.
Replacing FELLER: what matters technically
The page covers specific search intent around FELLER, replacement device and KNX retrofit.
Existing opening
The goal is a clean replacement without unnecessary wall work.
Project-specific check
Mechanics, power supply, KNX, network and visualization are compared before a recommendation.
Modern operation
Depending on the project, KNX IQ, TOUCHZONE, SUPERIO, DOMUS or CTP devices may be used.
FAQ
Frequently asked questions about FELLER replacement
Is there a direct FELLER replacement device?
That depends on the exact model, installation type and desired function. DIVUS checks each existing device project by project.
Which devices are relevant?
3990-Axx, 3990-Bxx, 4791-Axx, 4791-B.xxx
What does DIVUS need for the check?
Manufacturer, exact model name, photos of the front and installation situation, and available documentation are helpful.
Retrofit
Prepare a retrofit project
Overview of known replacement options for older operating devices from different manufacturers.
Retrofit
DIVUS exchange devices
Overview of known replacement options for older operating devices from different manufacturers.
Open PDFProject-specific check
Request FELLER replacement
Send device type, photos and project data directly to DIVUS.
Start request
