An absolute stellar job on the Komfovent C6M app (v1.8.0). Everything WORKS perfectly on my end! 
My setup: Model: Homey Pro (Early 2023)
Homey Version: 13.5.3
Unit Configuration: R-450 (Flow control mode: CAV)
Main module firmware: C6M 1.5.50.77
Control panel firmware (1): C6 1.1.5.53
Huge thanks to the developer for this amazing work! 
(As a small feature request for future updates – it would be absolutely amazing to have a “WHEN active ventilation target was changed” Flow card. The system is absolutely perfect, this is just the one card I found myself missing!)
BRAVO
update
Don’t forget HOLIDAYS , or THEN recuperator OFF 
@Bubiai_2 Your three requests are now in v1.9.1, available in Homey Test. It has also been submitted for review; this is not a Live release.
- Active airflow target changed and Active temperature target changed are new WHEN cards. They include the old and new targets, with the correct units. They follow observed targets, not actual fan speed, and do not fire just because Homey restarts.
- Set ventilation unit on or off is a new THEN card. This uses the unit’s own command, not a mains switch; fan run-on and external overrides may still apply.
- Schedule the unit holiday period uses the C6M’s own holiday calendar. There is also End the holiday period if you come home early.
On/off and Holiday have their own options in the device settings, off by default. For Holiday, enter dates as YYYY-MM-DD, up to 90 days. The end date is the boundary at the unit’s day change. Please check the clock on the unit: the app does not change it or substitute a Homey timer. Built-in room demand control must be stopped before scheduling Holiday.
I checked this on the R700, firmware 1.4.47.74: actual Holiday mode, both fans at 20%, then stopped after about 30 minutes. The early-end card brought it back to Normal at 35/35%. I also let the calendar period expire, and the unit returned to Normal by itself. Saved profiles and existing Flows were kept. Three final test rounds passed 422 checks each.
@Hans_Timmermans The confusing second slider page has been removed. Actual fan readings remain, and saved profile adjustments are still in Dashboard and Flow. It is not presented as a live fan dimmer.
Holiday is still beta on other firmware and CAV setups. Multi-day cycles and other microventilation frequencies need testing too. There were short reading gaps during the wider local test, so this is not a long-term reliability claim or a claimed fix for the original R450 disconnection. Timed cooking/fireplace assistance is not included.
Please try the new cards and let me know what happens on your unit. Model, controller firmware, app version and the exact error text are useful; please leave local IP addresses and private diagnostic logs out of the public reply. Thanks again for the detailed feedback.
I am using your app and want to report a few things:
Actual fan level changed: It works, but something is wrong. I changed the level only one time, but it sent the push notification four times.
On/Off: Works perfectly.
Schedule: It does not work for me. The Homey flow seems to run, but no dates/data appear on the recuperator. Question: How can I set the unit to Standby mode?
Update
I found this. Sorry.
