How can I DIS-able the wifi on my HomePod? I only want to use Bluetooth.

We do not use wifi - only hardwired internet access. When I use wireless speakers I enable bluetooth on my phone and keep the phone and speakers a good distance away from me. I need to be able to permanently and fully DIS-able the wifi signal on the HomePod. As with other wifi enabled devices, they continue to 'search and emit' a signal unless you permanently dis-able the wifi. Is this possible with HomePod?