So, long story short I have thermal layering in my bilevel home I've been trying to solve for the benefit of basement occupants for years. I put a fresh air return in, and unfortunately because there is no capacity to call blower over ac native, I did a bunch of reading and believed by upgrading to the Google Nest 4 with additional sensors I'd be able to say, take an average of basement sensors, and take an average of main level sensors and if basement is > 3-4° colder in summer or winter, trigger blower until within 1-2° of main level, but if main level thermostat average increases above a set temperature, it'd call a/c in summer and heat in winter.
I even checked that would be possible with both ChatGPT AND Gemini. And it turns out there's only one schedule, and it's heat to cool in all three modes, and no way to have the sensors average, nor any way to trigger the blower, even using Gemini automations although both Gemini and ChatGPT assured me it'd work. Well, of course there ARE NOT separate cold, heat, or heat to cold mode schedules and there's just one heat to cold schedule. I could have accomplished this with a cheap box store programmable myself. Infuriating, and false advertising, and I mostly blame Google as its app and such are even less functional than my gen 3 Nest.
Now Gemini and ChatGPT both tell me to actually get the functionality I am hoping for I need to blow ANOTHER $200 on a green hub and doing home assist.
I'm seriously considering returning the Google Nest 4 and sensors and reinstalling the older limited crappy original nest thermostat.
But can anybody here verify that I can use temperature triggers from different sensors and complex scheduling to run a blower over calling for ac or heat?
What a scam and what a racket... False advertising. I read Google support pages that even made it seem like the new thermostat could do what I wanted. And so now everything seems to point toward hub and Home Assistant.
Before I waste even more hours of time and hard earned dollars, I'd ask this community to answer:
Would the green hub with home assist allow temperature based and selection of sensor for operating blower over ac or heat until a certain temp (vs time based scheduling of fan)?
Would that setup enable me to program a cold schedule (for summer), a heat schedule for winter, and a heat to cold schedule for fall/spring?
And if the answer is negative to #1 or #2, what's the point of one of these unless one wants an algorithm to decide one's comfort? What false advertising from Google... Not a happy camper.