Boiler Recommendation?

My parents boiler is pretty old and is in need or replacement. They currently have a gas boiler. They plan on doing it sometime over the summer. The house is 4 floors (2 duplexes) and a finished basement. Not including the basement about 2400 square feet. What kind of boiler do you guys recommend? I’ve also heard about tax incentive on specific boilers. Let me know what everyone thinks.

By guikazoid |