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So just bought an 137 year old house that has a 5 year old Burnham in11 natural gas, steam boiler. When we move in the pressure was set to 5 psi with a 1.5 diff. My understanding is that it should be around 1-2 psi with a .5 diff, please explain what the settings should be. We get heat through out the house in all rads and no banging. I have steam cleaned the system and replace all vents. I’m not an expert hit why I’m posting, but the header on this thing doesn’t look right, let me know what you think. And no I did not do the insulation, needs replacing.