Just need to know if this is compatible with Nest, thanks.
Go to the Recommended Answer.
Yes, your system is compatible with any of the Nest thermostats.
Just match the labels on the left side of the terminal block (heat/cool side) with the Nest labels.
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Yes looks like a hot air heat only system (no AC).
Looks like you have a Common wire on Blue so you are good to go for the Nest.
@Patrick_Caezza and Houptee, thanks for the help!
@Peter_B, I hope that Houptee and Patrick's answer helped you. Let us know if you have other questions and we'd be glad to assist you.
I wanted to check in, and let you know that I will be locking the thread in 24 hours.
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