Here's Google's list of compatible devices. It includes thermostats, smart lights, smart switches, smart locks, sprinklers, security systems, large appliances and even some cars. Google also expanded its list of compatible devices at I/O and made them easier to control with natural commands. Here's CNET's guide to Google's compatible smart home devices.
Not sure but you could call and ask them.
I don't know about that
Thanks! Your answer is awaiting moderation.