This Crown Boiler 100/150mm 78 has some cosmetic damage incurred during shipping. End of pipe has some bending. For detailed photos please click 'See Additional Images' above. This Crown Boiler 100/150mm 78 meets the full manufacturer's specifications, comes with the full manufacturer's warranty, and includes Alpine's premium guarantee.

For product specs and photographs of product in its original condition, click here.

Concentric venting consists of a "pipe within a pipe". Flue gas exits the building through the inner pipe and combustion air is drawn into the boiler through the space between the inner and outer pipe.

Each Crown concentric vent component consists of an inner pipe of polypropylene and the outer pipe of steel. Integral gaskets on each concentric fitting provide a gas tight seal.

"Vent Size" denotes nominal inner and outer pipe diameters in millimeters. For example 60/100 concentric components have a 60mm diameter inner pipe and a 100mm diameter outer pipe.

Please see the BWC Installation Instructions for specific requirements on how to vent a BWC boiler in your application.