components

Just wondering how many of you shop at Reichelt and how often? Bought a few bit's from them before, but only stuff like Network cables and related Patch panels. Site: https://www.reichelt.com/de/en/ Reagrds: Elliott.

Looking to upgrade with s type control pack to control hot water and rads separately and would like to know the difference between the available control packs for vented and un-vented. i understand the difference between vented and unvented system but what is the difference between the...