How Duramix^™ Face and By-pass Coils Work

Special dampers, controlled by a pneumatic actuator connected to a temperature sensor, adjust the leaving-air temperature by channeling the appropriate volume of entering air across the heating coils and allowing the remaining air to pass through by-pass channels. As entering air temperature gets closer to or farther from the set point, the dampers are closed or opened accordingly.

Armstrong Duramix^™ heating coils combine the advantages of a face and by-pass system with the quality and heavy-duty construction that are part of every Armstrong coil. From an all-welded, monometallic coil to corrosion-resistant linkages to a tough casing assembly, Armstrong Duramix coils are built to provide long-lasting service. Our Duramix units can have vertical or horizontal louvers.

Duramix provides:

• Maximum freeze protection
• Accurate temperature control
• Consistent leaving-air temperature

Typical applications:

• HVAC air preheat systems
• Make-up air systems
• Combustion air preheat systems