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Thank you for teaching me about my heating system last winter. I changed a few vents, swapped in a Gorton #2 main vent, learned my thermostat, removed radiator covers, read Dan's book, adjusted the pressuretrol to +1/+1, etc. I call it a success, and the steam worked great. Bills were manageable.

I am thinking of getting a fireplace insert wood stove to augment the steam for next winter.

I have tankless coil, so my boiler runs 24/7/365.

Also, got the original service guy in. He only changed filter, nozzle, strainer. No brushing/vacuuming, and I've let that go. He said my 1945 boiler does not have the heat exchanger nipples that need brushing, b/c the gap is wider (or something like that). I also learned not to sweat every detail, and deal with a "good enough" mindset. When it breaks, I'll get a new one.

Hope you guys are enjoying your Spring & Summer. What interesting stuff do you guys focus and obsess over in warm weather??

measure the edr of the steam emitters connected to the boiler.

I wouldn't worry about the hot water loops unless it is over 30% of the output if the boiler and even then it won't be an issue unless the edr just matches the heat loss of the building. you could do some comparison of the output of the boiler to the heat loss of the building, as long as the boiler is bigger shouldn't be a problem.

Sure the system hasn't gotten over-filled?