-
Can’t help but feel a small combi just isn’t up to the job personally having previously had a system with a driver pump. Appreciate it’s personal preference though. But in 2021 if the shower isn’t both bloody hot and capable of knocking me over, I’m out.
Shower at my parents place is good but their combi is about the size of a system and lives in the garage so massive pipe runs - literally never wash hands in hot water.
Mains boosters will be limited to 12l minute.
If you want a not shit shower experience get a tank and pump from it. May require a bigger house tho ;)