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Sorry! I misread UpgradeME's earlier message! Please ignore!

Yes but I would I need the optional VR65 (i think its called?) wiring centre and the discontinued Tado extension kit, correct?

You are correct. I have only started investigating the issues but so far I can say that I have managed to HALF my usage by doing the following things: 1) Turn off Tado's "early start" for all radiators. For one radiator in particular, I noticed that the system was going crazy and starting to...

Yes I have. For rooms we do not use (as they need work or simply used for storage currently) I have turned off the SRVs completely. I purchased a temperature & humidity sensor from Amazon and placed it into each room. I then left it in the room for a few hours to acclimatise. After this I...

That's amazing. Thank you so much. I will add it to the list of things to do!

Thank you. I will look into vaillant's own controls

Thanks both. I am a novice so appreciate you looking into this. Do I then need to look into an alternative system to control the boiler that is compatible with ebus? Is there options I should look at?

Thanks for your insights. I am currently suffering from information overload! Things I have learnt so far is to: 1) Block up the fireplace. This seems to be the primary source of heat loss. 2) I turned of the early start function in the Tado heating system yesterday on all my radiators. So...

I have the V3+ wireless receiver which doesn't have the ebus terminals. The older discontinued extension kit had the terminals and even then from what I've read it was compatible with Vaillant combis. I am still reading up on this but so far it doesn't look promising for open vented Vaillant boilers

Thanks, I don't I can do that yet as the house is lacking basic insulation in most rooms. Using my heating system, I can see how quickly the heat is lost throughout the day when the heating is off. This means that my boiler would be running full tilt all day if I did what you did

Ok thank you. When you say you have the whole house at 20°C, is that all day?

The meter has a volume reading only. I plan on doing the boiler consumption test in the next few days.

Thanks, I will block it up and cover the front for good measure (to stop someone from accidentally turning it on).

Definitely an option, although I hate my feet and hands being cold! Might have to go with the heater option!

Thanks, I will pick one up. I have all the heating turned down to frost protection. Would it be better to have them set to, say 16°C instead until I need to turn them up?

Thanks, this is really useful information. I will definitely do this as it makes sense to not use the boiler just to heat one room in the house. Would you recommend a certain type of heater for this? I.e. oil rad, electric fan heater, etc.?

Thanks I will try and do this check... Does it have to involve the DHW cylinder or can I just set the central heating to a high temp and do the same check? Also can you clarify how long 'ages' is? Thanks

When we first moved into the property, the meter was imperial. The meter is now a smart metric meter. The conversion is not an issue as I have checked the bills before and after the meter change and they have recorded the usage correctly. How can I definitively check if the boiler is short cycling?

Thanks for your insights, I have looked at the EPC and it is an overall D (which is apparently the average rating for properties if a similar size). It mentions estimated energy needed in this property is 33,000 kWh per year for heating. I guess if you factor in seasonality of usage, this may...

Thank you for your insights. I note what you are saying about insulation and heating only select rooms. I am only turning off the heating for the moment to check my theory that it was that room causing the high usage. Once I have determined if it was the cause I can then look at resolving the...