Avoid proprietary protocols to communicate between sub-systems as much as possible.
The system should be self contained from the start and must be able to function without a local network & internet.
Do not require internet connectivity, a hub, or some intermediary solution if a third party system (such as Home Assistant) wants to communicate to the system.
My biggest fear is attempt to lock me into an ecosystem that charges me a monthly fee to just exist, while selling data about me. No promise will make this fear go away, as consumers mistreated many many times in the past. Show it through your open design.
Good luck.
> What issues have you had with your existing heat and cooling, and do you have any interesting stories around a heat pump install or use? I would love to hear your ideas, experiences, and feedback on any and all of the above!
Fan motor on compressor broken, company insist everything needs changed. Another similar incident was with a capacitor. Such rip-offs create a disdain in consumer.
In some very cold nights, the heat pump fails to keep the heat and emergency/aux heat kicks in.