The wifi strips will continue to communicate with the controllers as long as there is wifi. They do not need internet. I would still not use them for ATO, AWC or dosing since if communication is lost between the controller and wifi strip the strip outlets will remain in the state they are in when communications is lost. You can use them for heater if those heaters have another way of turning off other than the wifi strip. The XP8 is better for ATO, AWC and dosing since it communicate as a member of the collective over the command bus which is a wired connection to the other controllers that are members of the collective. Then again they may have been considering a wifi strip a controller which it is not. It is a Tuya protocol wifi strip that is paired to the controller using wifi. Unfortunately some wifi router will mistake the communication as a threat and block it. Another issue is that the wifi strips can connect at 5 ghz but if they do they will not be able to communicate with controllers on 2.4ghz. I had wifi strip communication issue about 2 to 3 times a week until I got a new router back in December and I have had no issues with them since.