A:AnswerYou won't get an alert if someone changes the setting manually while you're away. However, you can control with your iPhone when away from home. You can also set it automatically to Eco mode when you leave home, based on the location of your iPhone.
A:AnswerYes, you can even have it set to schedule the fan to run for a certain duration to cycle the air throughout your home. I think that’s better than have the fan constantly on, reduces electric bill. You can also have it set for the fan to kick on if the humidity inside your house gets too high.
A:AnswerYou can follow this link to check for compatibility: https://nest.com/support/article/How-to-tell-if-your-heating-and-cooling-system-will-work-with-the-Nest-Thermostat
A:AnswerDawn,
Sounds like something isn't wired right. I would reach out to Nest and they can assist you. Their support in troubleshooting a software issue with my original thermostat took a bit but they knew what they were doing.
A:AnswerI have installed my nest in an older system which did not have a C wire. This worked for a one zone configuration. If your home has more that one zone, you will need to run a C wire. If your controller does not have a C terminal, you can use a relay to create one.
A:AnswerI think you have to purchase 2 Nest thermostats as these are hard wired to each furnace. We are in the same situation, although we've only purchased one for now. It does require WIFI so be sure you are near an internet wifi connection to make it work correctly.
A:AnswerIt depends mate. Do you have two zone? if the answer is you only have one zone than no. But if you have two zone than you will need two nest to control each zone.