HEATING SYSTEM. When to convert? When to Switch?

[Gabriel De Almeida]

Hey team!! I have a few questions about heating.

1) I live in Massachusetts and only deal within MA and wanted to know when should one replace a boiler responsible for the radiator heating? Is there a rule of thumb in terms of the age and condition? How much does it usually cost?

2) Is it expected and should you convert the fuel from oil to gas heating? How much does that conversion cost?

3) For new rehabs, is it expected and should you convert from a boiler radiator system to a forced air system?

Thank you all so much for your help! :)