Is my system compatible?

[Marylandguy]

Wanting to see if my system is compatible.  How do I post a photo on here?

[Patrick_Caezza]

@Marylandguy 

Press the Reply button and then use the little camera icon at the top of the reply window.

[edsargent]

@Patrick_Caezza
are you able to help as I am looking to install a nest in place of a honeywell T40 dial thermostat on a gas combi boiler - couldn't see a photo icon