
They are impervious to petroleum-based chemicals, which can deteriorate gaskets used in some competitors’ boilers. Ease of Maintenance and Installation The C3 & C4 Series Boilers are designed for quick, inexpensive servicing. Jacket design allows entry from both the top and side to allow complete access for cleaning. Burner swing door provides easy access to the combustion chamber for fast servicing. Packaged and ready to install with optional tankless coil for domestic hot water. Circulat