Hydronic balancing of HVAC heating and cooling systems is essential for many reasons. It is necessary in order to achieve proper indoor comfort and for the system to run as efficiently as possible. If the hydronic balance is not properly in place, end-user complaints, extra costs and reduced lifetime value of the system can be expected.
Danfoss offers a hydronic balancing solution for every situation:
Pressure-Independent balancing and Control Valves (PICV) combine hydronic balancing and temperature control functionalities in one product. They are simply set to the design flow and used in both heating and cooling systems with variable flow conditions.
Automatic balancing valves eliminate pressure fluctuations occurring in variable flow systems. With additional pre-setting radiator valves that limit the maximum flow through e.g. radiators, the system can be hydronically balanced. Another automatic balancing solution is provided by the Pressure-Independent thermostatic radiator valves which combine the control of differential pressure and flow limitation in one valve.
Thermal balancing valves establish a proper balance by using the temperature entering the circulation pipes of Domestic Hot Water system risers. This provides a very efficient system.
Manual balancing valves can be used in systems with a constant flow, such as systems with 3-way control valves. They need to be commissioned to establish the design flow.
Danfoss automatic balancing valves
Hydronic balance by setting the required differential pressure in risers and design flow at the radiators without any tools
How we can help you
Improved energy efficiency and indoor comfort
Fewer complaints about uneven heat distribution
Fewer complaints about system noise
Savings on pump dimensions and energy consumption
Relatively short payback times
Documents
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Related products
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With LENOTM MSV Danfoss offers a versatile range of manual balancing valves for different HVAC heating and cooling applications having a constant flow system. The valves are available in sizes DN 15 – 50 and offer several practical benefits.
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ASV automatic balancing valves provide a dynamic balancing solution for two-pipe heating or cooling applications. The riser-mounted valves eliminate pressure fluctuations occurring in variable flow systems at partial load conditions. For a proper hydronic balance the valves should be combined with pre-setting valves.
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AB-QM Pressure Independent balancing and Control Valves (PICV) provide both a control functionality and dynamic balancing solution for HVAC heating and cooling systems. PICVs are designed for various types of terminal units, Air Handling Units (AHU), chillers and provide high indoor comfort and energy efficiency in public and commercial buildings.
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MTCV Thermal balancing valves provide a dynamic, temperature based, balancing solution for drinking water applications. Combined with the CCR2+ a smart and energy-efficient electronic control solution for monitoring and disinfecting DHW systems is established.
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Robustly built and designed to meet the rigors of the commercial and industrial sectors, a comprehensive range of Danfoss radiator valves is available for practically all systems and installation conditions.
Learning
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While the global community is very aware of the Covid-19 virus, another potentially fatal bacteria, Legionella, is causing more and more infections every year. Research even shows a relation between both infections. Read more about the increased risks in DHW systems due to Legionella and Covid-19 in this article.
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Shell & Core buildings – larger buildings split in smaller zones for rental purpose – such as office buildings or shopping malls are rapidly gaining in popularity. The design and commissioning of the HVAC system in such buildings requires another approach. If this is not taken into account issues like a long handover time, an over-dimensioned and unreliable system will occur.
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With static hydronic balancing, the mass flows are regulated manually, via pressure-dependent valves. Here, the mass flows are calculated and set exclusively for full load cases – efficiency-optimized heating water distribution is therefore only aimed at for the maximum utilization of the heating system
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Dynamic hydronic balancing keeps the water flows and differential pressure of the heating system constant throughout the building under all load conditions and offers high energy saving potential, especially in large buildings.
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Auto-balancing can be used in addition to or as an alternative to static or dynamic balancing. Auto-balancing solutions use intelligent digital system control to ideally implement complete hydronic balancing without complex pre-calculations. Danfoss’ solution is suitable for systems with up to 20 radiators or heating circuits, i.e. primarily for detached and semi-detached houses.
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Hydronic balancing is one of the most important measures for optimizing heating systems. Although all experts are aware of this measure, it is still difficult to draw clear distinctions between its variants – static, dynamic and auto-balancing.
Case stories
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Building: Hotel/resort
Application: Renovating the Domestic Hot Water (DHW) system to stabilize water temperatures
Challenge: Reduce hot water wait times and improve energy efficiency
Solution: Multifunctional Thermostatic Circulation Valves (MTCV) were installed on DHW branches for hydronic balancing. -
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Building: Hotel/resort
Application: Heat pump system for comfort cooling via fan coil units
Challenge: Increase guest comfort and save on energy costs
Solution: The hydronic HVAC system for cooling was equipped with AB-QM 4.0 PICV valves for dynamic hydronic balancing and control via TWA-Q thermal actuators -
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Building: Office
Application: Hydronic balancing and remote control of 4-pipe heating/cooling change-over system.
Challenge: Gaining BREEAM credits for energy monitoring and ensure fast, fail free installation.
Solution: Digital NovoCon S actuator combined with AB-QM 4.0 PICVs and ChangeOver6 Energy. The combination balances the system hydronically, allow remote access via a BMS and provides actual energy consumption data per climate panel during both heating and cooling operation. -
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Building: Office
Application: Hydronic balancing and remote control of 4-pipe heating/cooling change-over system
Challenge: Ensure a flexible to use HVAC system with DGNB sustainability certification
Solution: Digital NovoCon actuator combined with AB-QM control valves and NovoCon CO6 combined with ChangeOver6 as a combination balance the system hydronically, allow remote access via a BMS and control the room temperatures during both heating and cooling operation. -
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Building: Office
Application: Climate panels with a four-pipe change-over system for Heating and Cooling
Challenge: Establish a modern, innovative HVAC control system optimized for flexibility in (changing) usage of office space
Solution: Integration of Danfoss field devices with the Building Management System via BACnet bus-communication -
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Building: Hotel
Application: Hydronic balancing and control for radiator heating and fan coil cooling
Challenge: Establish top level comfort and minimum energy consumption for heating and cooling
Solution: Fan-coil units for cooling; 8 heating risers and radiators equipped with Danfoss products.
Videos
News
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New NovoCon® M, L and XL digital actuators for AB-QM Pressure Independent balancing and Control Valves (PICV) complete the series of smart, digital, IoT actuators for hydronic HVAC applications.
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When designing projects, big or small, finding the best solutions for your designs in a fast and easy way can be crucial. To simplify your design work and save your time, we have developed a new online platform – Digital Design Center.
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Danfoss AB-QM 4.0 replaces AB-QM Pressure Independent balancing and Control Valves (PICVs)
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