Efficiency gains from upgrading a steam boiler
With recent talk on steam boilers I was wondering what types of gains can be made from upgrading a 35+ year old Penco 192k/152k one pipe steam residential system for my home. The Boston area home has 450 EDR of attached radiation. I’ve gotten it down to 305 EDR after losing a couple radiators in a kitchen remodel and turning off the unused attic and basement rads. I could lose another 25 EDR as the two bathrooms have heated floors. If I downsized a couple of the large radiators after doing a heatload analysis I imagine I could get it close to 250EDR. With a standard 1.33 pickup, I’d be looking at an 80k boiler.
Would that in theory reduce my nat gas usage by 60%? Even more with decreased jacket losses/dampers etc?
I used 1120 therms 2016 calendar year/5300HDD. I’m trying to see how much I could save by downsizing and making the system as tight and efficient as possible. I have some minisplit heads as well but would like to retain steam system for deep winter comfort.
GBA Detail Library
A collection of one thousand construction details organized by climate and house part