The Efficient Home Forum

Hi - I'm keen to purchase an EvoHome system - for me to install and ideally avoid the need to change any electrical wiring.

I'm currently deploying: -
> 1 X Honeywell wireless enabled programmer ST9420C
> 1 X Honeywell room stat DT92E
> 8 Bulldog TRVs

I wish to replace with: -
> 1 X WiFi EvoHome programmer bound to 8 X HR92s
> Retain the ST9420C for hot water control only

Question - Is this possible?

Possible, yes.