Eve Thermo replacing an Oventrop UniLA Thermostat

This week I installed an Eve Thermo 2 in our home, the Eve Thermo integrates perfectly into my home automation setup and Apple’s Homekit. While installing I came across a problem when I tried to replace the original thermostat, an Oventrop UniLA. I learned that this thermostat has a M28x1.5 connector, while the Eve Thermo 2 comes with a M30x1.5 sized connector. I would like to show you how I changed it, in spite of my two left hands…

TLDR: Go and buy a M28x1.5 to M30x1.5 adapter.

Remove the Oventrop UniLA

This was easier than I thought, just set the old thermostat to the maximum (5), use a plier to make it loose and remove it by hand.

M28x1,5 to 30×1,5 Adapter

I bought one at a local home improvement store. I decided to go with the one made from metal and not one of the plastic ones, just because it seemed a little bit more robust to me.

Apply the adapter to the radiator and then just follow the instructions given in the Eve app, which is also a great application to create advanced automation rules in Homekit as well, even if you don’t have Eve products at all.