Heating circuit (definition)

Heating circuit — is a closed part of the heating system in which the coolant circulates to transfer heat to various heating devices, such as radiators, underfloor heating or convectors. In the context of a multi-circuit heating system, the circuits can be divided into low-temperature and high-temperature segments, each of which serves different purposes and types of heating devices. Heating automation It is implemented by adjusting the heating circuits as a whole or separately via Wi-Fi.

Heating circuit: main types in a multi-circuit system:

1. High temperature circuit:
   • Description: Typically used to supply coolant to radiators or other appliances that require higher temperatures for efficient heating.
   • Functions: Maintains the coolant temperature at 70-90°C, providing fast and intensive heating of the room.
   • Peculiarities: Can operate independently or be integrated with low-temperature circuits via mixing units or heat exchangers.
2. Low temperature circuit:
   • Description: Used for underfloor heating systems or other low-temperature heating devices where a coolant with a temperature of 30-50°C is required.
   • Functions: Provides uniform heat distribution across the floor surface or through other low-temperature elements, creating a comfortable microclimate.
   • Peculiarities: For operation, a mixing unit is often required, which reduces the temperature of the coolant to the required level.

Interaction of contours:

• Mixing units: In multi-circuit systems, mixing units are used to regulate the temperature in low-temperature circuits by mixing the hot coolant from the high-temperature circuit with the cooled coolant.
• Hydraulic balancing: To ensure uniform operation of all circuits, correct balancing of pressure and coolant flow is important, which is achieved using balancing valves and pump groups.

Advantages of a multi-circuit system:

• Energy efficiency: Support of various temperature modes allows more efficient use of heat energy, reducing overall heating costs. The heating circuit can be regulated by the pump group in an analog and digital way.
• Comfort: The ability to create different zones with individual temperature conditions (for example, heated floors in the bathroom and high-temperature radiators in the living room) increases the level of comfort in the room.
• Flexibility: Multi-circuit systems are easily adapted to the user's needs and can be expanded or upgraded as needed.