I just moved into a house with a gas-boiler steam system that provides heat (in-floor) and also runs the hot water tank. It works well enough but the floor heat seems a little weak.
In a previous boiler-heated apartment the system worked poorly until we noticed that the water gauge on the boiler was near zero. We hooked up the supply, ran it til the needle went from red to green, and just like that it ran great again.
I'm wondering if something similar could be at play here. The new system has a pressure gauge and supply inlet but the dial is just 0-10 bar, no "target" shown. How do I know if it's low? If it is, how do I know what to fill it to?