85% Efficiency


Gas, Water
Cast Iron Heat Exchanger

The Perfect Balance Between Efficiency and Practicality

The ESC boiler is a modern, versatile boiler designed to maximize the comfort and efficiency of nearly any heating system. It delivers the perfect balance of energy-saving performance, durability, and features for homes where a chimney-vented boiler is not an option. The ESC features an advanced cast iron heat exchanger, and a well-insulated heavy-duty steel base. It also features the IQ Control System which not only monitors boiler operation, but also gives the ability to add additional energy saving features to the boiler. By striking a balance between the types of advanced energy saving features typically seen on high-end condensing boilers and the tried-and-true durability of cast iron boilers, the ESC is uniquely able to offer homeowners the best of both worlds!

  • Direct vent (horizontal or vertical) or Power Vent
  • Natural or LP gas
  • Limited Lifetime Manufacturers Warranty
  • Exclusive IQ control system
  • Optional LCD touch screen for system monitoring
  • Time proven cast iron design for durability and reliability
  • Optional 5 or 10-year parts & limited labor warranty
  • Extended Boiler Warranty Plans are administered by CornerStone United, Inc.