The Efficient Home Forum

Hi

I have purchased all the evohome equipment which finally is going to be installed in the next few weeks. However I'm considering making the setup opentherm.

Currently I have a two port valve and I'm setup as figure 4. With a opentherm setup a 3 port valve is recommended for true hot water ...

Hi

Where are people buying these from? Any stockist in the UK. I've googled these two, but both are not UK based.

https://tweakers.net/pricewatch/402418/vaillant-opentherm-module-vr33.html
http://www.thermostatenkoning.nl/zoeken?controller=search&orderby=position&orderway=desc&search_query=vr33 ...

I need to do exactly the same as you discuss. how far did you end up extending the probe?

Al the best
Iain

Thanks for this.