Boilers are smaller for higher efficiency, and they behave very differently from the boiler originally installed with the old steam systems. And the needs of a boiler vary with boiler design.

STAYIN’ ALIVE: The decades-old Burnham Series 2 cast-iron boiler was the home’s original heating system. Most of the near-boiler piping and all of the key components were replaced, but the boiler got ...

Today, we see many primary/secondary systems, which may be more baffling then the old manifold systems, but which actually share some similarities with the old "monoflo" systems. We must remember that ...

Lona Carter-Scanlon, principal at Jefferson Elementary, said temperatures in the 66-year-old school would swing from sweltering hot to freezing cold when the building’s original boiler was used.