You are not forbidden at the Federal level to have fixed units.
But many states do indeed requires a permit to install fixed units. And have strict regulations such as self producing half of the electricity required by the installation.
One of the side effect of such regulation is that many business and houses will use cheap non-fixed units with open door and windows instead of installing proper reversible heat pumps.
But many states do indeed requires a permit to install fixed units. And have strict regulations such as self producing half of the electricity required by the installation.
Here are a few examples of such regulations:
- Geneva (the most strict state): https://www.ge.ch/installations-techniques-rafraichissement/...
- Fribourg: https://bdlf.fr.ch/app/fr/texts_of_law/770.1/art/16
- Vaud: https://www.vd.ch/fileadmin/user_upload/themes/environnement...
One of the side effect of such regulation is that many business and houses will use cheap non-fixed units with open door and windows instead of installing proper reversible heat pumps.