How many zones does Wiser support? Follow 16 zones heating zones (plus one hot water), with up to 5 devices in each, up to a maximum of 32. Related articles How many channels does Wiser have? Does Wiser Heat have weather compensation? I have a wired thermostat connected to my boiler - What do I do? Wiser User Guide How many devices can one Wiser Plug support as an RF signal range extender? Comments 0 comments Please sign in to leave a comment.