Boiler/Radiator

as owner of two family brownstone for 10+ years, have always had poor heating on the top two floors, despite adjusting pressure, bleeding radiators, etc.
have also been told in the past two years the boiler should be replaced and runs very costly, inefficiently.
it’s currently oil, hot water system. the boiler is huge, decades old, the radiators paint encrusted, probably as old as the boiler, none on the top floor radiate heat.
i would like to upgrade the system, replace the boiler and get new radiators for the top two floors.
my questions would be
– should i do a new oil boiler or switch to gas
– radiators – i know of governale radiators and they look exact replacements, but wondered if anyone has installed them
–any tips or recommendations for how to proceed, as it’s a big undertaking. do i buy everything or have plumber do it all…….

thks!

By jolly |