Do I need the Extension kit?
I have a gas system boiler with a Megaflow for hot water storage.
I have two wired thermostats, one for upstairs and the other downstairs.
This is all currently controller via a Hortsmann Channel Plus H47XL. This has there of the for channels in use. Upsairs, downstairs and got water. All three zones can have different timing schedules.
I'm looking to install Tado but I'm really confused around if I need the extension kit? Would this replace the Hortsmann unit? Or do I leave this in place?
Answers
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Thanks for the advice @GrilledCheese it's a great help.
Being a DIY incompetent, I was going to get a professional to install it anyway. I'll ask them about the wiring being changed to also Tado to control the hot water .... but it sounds like it's not worth the effort of cost if either is high.
So at a basic level all I need to purchase is a Start Kit + Extra Thermostat.
And possibly an Extension if an electrician looks at the wiring and can replace the Hortsmann unit.
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