Reliable: KN's patented cast iron section design provides unmatched durability

Condensing Cast Iron Performance

KN-Series boilers represent revolutionary engineering.

The world's first boiler to pair condensing performance with cast iron's durability. No other boiler can match it point for point when it comes to set-up, maintenance, and long-lasting performance. Not one.

All KN-Series cast iron sections are manufactured in the USA for durability and longevity by people with generations of foundry and manufacturing expertise in Boyertown, Pennsylvania. All castings have precision machined ports for water tight joint seals and are rated at 100psi of working pressure. KN-Series boilers retain valuable latent energy heat for maximum efficiencies.

Long life and dependability.