What is a COPPER FINNED BOILER?  The Copper-Fin Boiler delivers quality performance to the commercial boiler market at a competitive price. And it offers several Built-In-Advantages that competitive models don't. And with 3" clearance from combustible walls, the Copper-Fin will fit in tight spaces others won't. Plus, getting it there is easy, because most models fit through a standard 36" doorway. The Copper-Fin is easy to operate, reliable and efficient.