And where do you put the PSU for the devices? Remember you might need to replace them, so "in the wall" is bad idea. Practically speaking you'll also need a la

And where do you put the PSU for the devices? Remember you might need to replace them, so "in the wall" is bad idea. Practically speaking you'll also need a larger duct for Ethernet+DC (if you need/use them; we have stone walls, and need them) and pull twice the number of lines. Even pulling Ethernet and DC at once adds some overhead. Now for a single device it's not a lot of difference (but then just use a single PoE injector instead of a PoE switch), but you'll easily add 4 to 8 cameras to a house and 3 or 4 APs. And with a big PoE switch, you can casually get the PoE variant of other devices, so even less PSUs (for us: VoIP-to-Dect gateway [the SO insisted on a "landline"], Modbus-to-TCP gateway [energy meter], video doorbell and a 5 port switch). Our switch also reports power usage and allows to use schedules (we're not using that, but might be interesting for larger installations).