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Upgrade V3+ to EU or go to X

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dapplespider
dapplespider ✭
in General Questions & Topics

I have a UK V3+ Tado wireless receiver set up. My old heating system had a non-modulating boiler and non-smart TRVs. I now have an OpenTherm Ideal Logic Max combi (similar to Logic + but with a filter) and new rads that will need some sort of TRV.
My original thought was to buy V3+ smart TRVs but then I realised that as it’s a UK receiver, I won’t get the benefits of the boiler modulation.

I am unsure on whether to stay V3 by buying the EU receiver and then v3 TRVs or just make the jump to Tado X and buy the wireless starter kit and the X TRVs. I suspect the overall cost will be within £100 or so of each other as it’s basically a fresh installation either way.

My home isn’t large but the boiler is at the furthest point of the house. V3 has dropped out occasionally over the last few years. I have a number of Apple HomePod Minis across the house. There are 6 radiators in total over two floors that have an open staircase from the main living area. The bedrooms aren’t used during the day and it is an old Victorian so not the best insulated!

I’d welcome thoughts on which might be best or most reliable. I can see more recent problems re X but not sure if that’s a reflection of the product or just because more people are installing them. Thanks for your advice.

Comments

  • wateroakley
    wateroakley Volunteer Moderator

    @dapplespider Hello. The boiler documentation indicates that it will modulate across the range 24kW-8kW. Based on our experience* with a modulating boiler in relay mode, I'd surmise that you will get the benefits of modulation in both 'relay' and opentherm modes. Based on this, I'd suggest sticking with the V3+ setup that you have and add V3+ TRVs. Set each room as a 'zone' with your usage schedule and see what happens to gas consumption. Your call though.

    In 2022*, we added V3+ in relay mode and TRVs to our 2011 Baxi boiler (that modulates) with 16 rads. It took three months to work out the schedule/settings that worked well for us. Compared to 2018-21 (at the same outside temperature) the 2024-25 result is 50% reduction in gas consumption. No promise that's achievable by everyone.

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  • bolocal
    bolocal ✭
    Hi I have an OpenTherm boiler and found smart autotune thermostat (SAT). It’s a DIY project on GitHub, a Home Assistant integration that takes OpenTherm to the next level. It combines weather + load + automatic PID gains which is something that no other thermostat has done before. Room temperature is maintained within 0.1 Celsius reliably and consistently. Hopefully tado can implement something like that soon <3

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