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Jul 28, 2020
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Hi guys,

Hoping I can get some input on a subject related to an extension I am currently having done. My set up is that I have central heating in the majority of the house but as part of my ground floor extension, I am having a water pipe underfloor heating system fitted.

I have a megaflow tank (picture attached) and a potterton boiler (picture attached). My underfloor heating is a grundfos 2 zone manifold with Hetta aluminium pipes.

My question is on timers and thermostats. What exactly do I need? I have purchased 3 Google Nest E thermostats (Presuming I can use one for the main house central heating and water with the other two each controlling the underfloor heating zones). Is this sufficient for me to control my heating and hot water timers etc or do I need a dedicated timer? The reason I ask is because my builder has gone ahead and fitted a timer already (a "Lifestyle LP522") but he's confessed he doesn't really know much about smart thermostats and what functions they can/cant replace.

I do want to go the smart thermostat route, I understand the nest learning thermostat 3 can do more than the Nest E, I'd be happy to buy one of these if it removes the need to have a separate timer.

Appreciate any guidance!

Thanks,

Steve
 

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SJ you can use your nest stats if you so wish , a three zone system would just need a three channel programmer to seperate the zones three separate zone valves one for each circuit the hotwater zone would be timed on the programmer it's pointless having a nest on this , set the timed program for each heatng zone it's on and off times in this and just use 2 of your nests as a stat you can still control each heating zone individually on your phone you will need 2 nest accounts but it's doable providing the system programmer is set to be on at that time, other than that you may need a relay or two installed to get over multiple switching but it can be done providing the electrician is competent in heating control wiring , I recently did a system with 5 nest stats one for each zone bit ott but the customer gets what the customer wants 😁 regards kop
 

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