How to Choose the Right Circulator Pump Mode for Different Types of Homes

High-efficiency variable speed circulator pumps can work in four modes, AUTO, PP, CP, and CS mode.

AUTO Mode: In AUTO mode, the pump automatically adjusts its performance to match the demand of the system. This mode is designed for optimal energy efficiency, as the pump dynamically changes its operation based on the requirements of the heating system. This mode is typically used in systems where the load varies significantly over time.

PP Mode (Proportional Pressure Mode): This mode includes PP I and PP II settings. In PP mode, the pump operates based on the proportional pressure characteristics. It maintains a relationship between pressure and flow demand, adjusting its performance to meet the system’s varying needs. Regardless of the system’s performance, the pump operates at minimal pressure in this mode​​.

CP Mode (Constant Pressure Mode): In CP mode, the pump maintains a constant pressure regardless of the flow demand. This is suitable for systems that require a consistent pressure level, regardless of variations in flow. The pump will adjust its speed to ensure that the set pressure level is maintained consistently.

CS Mode (Constant Speed Mode): CS mode includes settings CS I, CS II, and CS III. In this mode, the pump operates at a constant speed, which is set according to the specific CS setting. CS I corresponds to the lowest rotational speed, CS II to a medium speed, and CS III to the highest speed. This mode is useful in systems where a constant flow rate is needed, regardless of pressure changes in the system

Each of these modes is designed to meet different operational needs of a heating or cooling system, providing flexibility and efficiency in various types of installations.

The right choice of circulator pump mode is a critical aspect of maintaining an efficient, effective, and comfortable heating or cooling system. It’s an integral part of responsible and cost-effective home or building management.

Here let’s talk about how to choose the right circulator pump mode for your houses.

Which mode is better for faster heating?

Usually, for optimizing the heating efficiency of an underfloor (radiant floor) heating system, and to achieve faster heating, the PP (Proportional Pressure) mode is typically the most suitable choice. Here’s why:

Responsive to Demand: The PP mode, especially on a higher setting like PP II, allows the pump to respond more aggressively to changes in flow demand. This is beneficial in a radiant floor heating system where the flow demand can vary significantly as the system heats up.

Maintains Optimal Flow: Underfloor heating systems work efficiently when there is a consistent and optimal flow of hot water through the pipes beneath the floor. The PP mode ensures that the pressure is adjusted in proportion to the flow demand, maintaining an optimal balance.

Better Heat Distribution: By maintaining the right pressure for the varying flow requirements of the underfloor heating system, the PP mode can help in achieving a more uniform and faster spread of heat across the floor area.

Energy Efficiency: Although the PP mode might cause the pump to work harder during the initial heating phase, it adjusts the operation as the desired temperature is reached, which can be more energy-efficient in the long run compared to a constantly high-speed operation.

Which mode is better for large house or small house?

The choice of operating mode for a circulator pump in a heating or cooling system, whether in a large or small house, depends more on the type of heating system and its specific requirements rather than just the size of the house. However, here are some general guidelines:

Large Houses:

If the house has a complex heating system with varying demand across different areas (like multiple heating zones), AUTO mode can be particularly effective. It adjusts the pump’s performance based on real-time demand, ensuring efficient operation across different zones.

For systems like underfloor heating that cover large areas, PP (Proportional Pressure) mode might be beneficial, as it adjusts the pressure in proportion to the flow demand, providing consistent heat distribution.

Small Houses:

In smaller houses with a more straightforward heating system, AUTO mode is still a good choice for its adaptability and energy efficiency.

If the heating system is relatively simple and does not vary much in terms of demand, CP (Constant Pressure) mode or a lower setting in CS (Constant Speed) mode might suffice, maintaining a steady flow at a consistent pressure.

In both scenarios, the key is to ensure that the pump operates efficiently, providing adequate flow and pressure without overworking, which can lead to increased energy consumption and wear. Factors like the layout of the heating system, the type of radiators or underfloor heating, insulation quality, and personal comfort preferences also play a crucial role in determining the best mode.

Which mode is better for high-rise apartment?

 In a high-rise apartment setting with an area not exceeding 200 square meters, the choice of mode for your circulator pump should be based on the specific heating system configuration and the unique challenges of high-rise living. Here are some considerations:

AUTO Mode:

This is often the best default choice for most residential settings, including apartments. AUTO mode automatically adjusts the pump’s performance to match the system’s demand, ensuring energy efficiency and optimal comfort.

In an apartment, where space constraints and system complexity are less of a concern compared to large individual houses, AUTO mode provides a good balance between efficiency and maintenance of desired temperature.

PP Mode (Proportional Pressure Mode):

If your apartment’s heating system experiences varied demand, especially if you have underfloor heating or different zones within your 200 square meters, PP mode can be effective. It adjusts the pressure in proportion to the flow demand, maintaining a consistent and comfortable heat distribution.

CP Mode (Constant Pressure Mode):

If your heating system requires maintaining a constant pressure irrespective of the flow rate, CP mode can be appropriate. This could be relevant if your apartment is part of a larger centralized heating system common in high-rise buildings.

CS Mode (Constant Speed Mode):

This mode may be less likely to be ideal in a smaller, high-rise apartment setting, as it operates at a fixed speed and might not provide the flexibility or efficiency needed in a residential apartment environment.

It’s important to remember that the heating requirements in a high-rise apartment can be influenced by factors like the building’s overall insulation, the efficiency of the central heating system (if applicable), and the layout of the apartment. Consulting with a heating professional or the building’s maintenance team, who can provide tailored advice based on your specific heating system and living situation, is always a good idea.

Which mode is better for your house in Europe?

In Europe, residential housing can vary significantly due to the diverse cultures, historical influences, and geographic conditions across the continent. However, some common types of housing found in European countries include:

Detached Houses (Villas): These are standalone houses, often with their own garden or yard. They are popular in suburban areas and provide privacy and space. Villas can range from modest single-story homes to luxurious multi-story residences.

Semi-Detached Houses: These are houses that are attached to another house on one side. They are common in both urban and suburban areas and offer a balance between privacy and community living.

Terraced Houses (Townhouses): These are houses connected in a row, sharing walls with the houses on either side. They are typical in urban areas and are known for their efficient use of space. In some cities, historical terraced houses are common, featuring distinctive architectural styles.

Apartments (Flats): Apartments are prevalent in urban areas due to their efficient use of space. They can range from small studio apartments to large, luxurious units. Apartment buildings can vary in height, from low-rise to high-rise buildings.

Condominiums (Condos): Similar to apartments, condos are individual units within a larger complex that are owned rather than rented. Condo owners typically share common areas like gardens, gyms, or pools.

Cottages: Often found in rural or semi-rural areas, cottages are small, charming houses, sometimes with traditional designs and features. They are popular as both permanent residences and holiday homes.

Farmhouses: Located in the countryside, these houses are often part of a working farm. They typically offer more space and may include additional structures like barns or stables.

Lofts: Originally industrial spaces converted into living areas, lofts are known for their open layouts and often feature elements like exposed brickwork or beams. They are trendy in urban areas.

The choice of the circulator pump mode in different types of European housing should be based on the specific heating system requirements and the characteristics of each housing type. Here are some general recommendations:

Detached Houses (Villas)

Recommended Mode: AUTO Mode

Rationale: Villas often have complex heating requirements due to their size. AUTO mode adapts to varying demands, ensuring efficient energy use and maintaining comfort across different zones.

Alternative: PP Mode for villas with underfloor heating or multiple heating zones.

Semi-Detached Houses

Recommended Mode: AUTO Mode

Rationale: Given the shared walls and potentially shared heating systems, AUTO mode provides flexibility and adapts to changing heating needs.

Alternative: CP Mode for smaller homes with simpler heating setups.

Terraced Houses (Townhouses)

Recommended Mode: AUTO Mode

Rationale: Ideal for efficiently managing the heating requirements of individual units in densely built areas.

Alternative: CS Mode for older buildings with less sophisticated heating systems.

Apartments (Flats)

Recommended Mode: CP Mode

Rationale: Particularly in high-rise buildings, maintaining consistent pressure is key, and CP Mode is effective for this.

Alternative: AUTO Mode for smaller apartments or those with variable heating demands.

Condominiums (Condos)

Recommended Mode: AUTO or CP Mode

Rationale: Depends on whether heating systems are individually controlled or part of a central system.


Recommended Mode: PP or AUTO Mode

Rationale: Ideal for maintaining comfort in seasonally used homes or those with underfloor heating systems.


Recommended Mode: PP or AUTO Mode

Rationale: Suitable for larger, rural properties that may have extensive heating systems.


Recommended Mode: AUTO Mode

Rationale: Adapts well to the unique heating requirements of open-plan spaces.

Alternative: CS Mode for simpler systems.

Key Considerations

System Complexity: Larger homes with multiple zones or underfloor heating benefit from AUTO or PP modes.

Consistency vs. Flexibility: CP Mode is great for consistent pressure, while AUTO Mode offers flexibility for variable demands.

Building Age and Insulation: Older homes might be better suited to simpler modes like CS, depending on their heating system efficiency.

Choosing the right circulator pump mode can lead to significant energy savings and enhanced comfort. While the above recommendations serve as a general guide, it’s important to consider the specifics of your home and heating system. For the best results, consult with a heating specialist who can provide tailored advice for your unique situation. Remember, the right mode not only impacts your comfort but also contributes to energy efficiency and the overall health of your heating system.

Let’s Talk Now!

    Please input this code:captcha