Best Of

a larger equalizer is no issue

You should call a professional

Not a problem at all. Reddit is not necessary the best source for accurate information.

Look like a genus installed ,piped wrong and god forbid you have to remove any burners .Who installed the boiler w the front facing a wall ? It looks as though the hartford loop is remotely installed instead of off the equalizer drop again a public school grad not reading instructions but the copper pipe gives it right away . Typical a good install in reality you need some one to re install that boiler correctly the performance and your fuel consumptions will tell the tale . Most likely its has a good deal of mud and rust in the boiler hence the churning noise but some will stay unnecessary but usually a good wanding and flushing of the bottom of the boiler and flushing of the return piping will help . Your performance will only as good as the near boiler piping but as most know steam is quite forgiving and will usually work even if installed improperly unless by some one who has a clue then there issues but when a hack installs it works perfect 'one of god miracles for sure and in complete opposite of murphy's law .

peace and good luck clammy

If the radiation can't keep up it doesn't matter how big you make the boiler it'll just keep cycling on pressure.

What pressure was your boiler running during this event?

So your bathrooms and kitchen were all below 32 degrees ?

I would not size a boiler on deficiencies with the building. I'd fix the deficiencies with the building.

If the heating system can't keep up to your satisfaction you may need more radiation and a boiler to match. or just improve the building (or strategic places) which is a one time cost, fuel is a continuous cost.