Ok.. that's a pity. I wil try the solution by adding a KAKU switch on the perilex than.

Well... my wall control is on the first floor I will remove the control to see...

Hi All! I have the following situation: I want to start with my central ventilation system via a KAKU control, preferably the ACM-LV10 and if possible withe the fully variable speed control. The above posts are mentioning a newer type JE Storkair / Zehnder CFMeR system with the RF possibilty ...