Installation of a new slant/fin 100,000 BTU steam boiler for a 3 unit + commercial space in Manhattan. We installed master vents and TRVs along with the new boiler to increase comfort, efficiency, and properly size the boiler. The old boiler was 280,000 BTUs and to our surprise the installed EDR was only 55,000 BTUs for the whole building. The commercial space has so many people and equipment that it typically doesn't even require heat. Luckily for them, the installed TRVs will control the first floor so they no longer over heat.
The old boiler was so oversized that it had severely corroded. It's unlikely it would have survived another winter.
During and After Pictures: