What boiler/model question!......

[TomHardy1]

Hi

What is the make/model of the boiler (about a year or so old) that has a small plastic cover (2 screws) on the back of pcb case which contains a short plastic stick, which is then used to adjust the CO2 level for combustion through a potentiometer?

It's a premix burner

I think it might be a Glow Worm but just can't remember


Long story .... but it's been bugging me!....

 

[compheat]

I used to install them and I cant for the life of me remember there name

 

[Andygasman2010]

I can only remember the Glowworm Compact that has a little plastic stick but it's not a premix burner though.