Terminal units such as fan coil units, climate panels and induction units are particularly popular in HVAC systems for larger buildings. There are some good reasons for that; they don’t take up precious floor space, they can be accessed for service or maintenance, they are simple to connect to the HVAC system and they can be used for heating, comfort cooling, or both.
To achieve high indoor comfort of the heating and/or cooling provided by the Terminal units, it is important to have a proper hydronic balance, reliable control valves and accurate room temperature controllers. This is where Danfoss comes in.
Our Pressure-Independent balancing and Control Valves (PICV) ensure proper system hydronic balance, both in full load as well as partial load conditions. Once equipped with a matching actuator, they function as control valves at the same time.
If both heating and cooling are required and a four-pipe system is used, our robust changeover valves provide a compact solution, eliminating separate balancing and control valves for heating and cooling.
We also offer the more traditional manual balancing valves and motorized control valves. This combination can be used where three-way control valves are used, and a constant flow system is achieved as a result.
Danfoss room thermostats offer a simple standalone solution to control the room temperature. They are connected to the control valves and ensure a stable room temperature and optionally fan speed selection and time scheduling.
How we can help you
Complete product portfolio
Fewer components needed
Easy and fast commissioning
Increase energy efficiency
Danfoss pressure independent balancing and control valves documentary
Hear all about the benefits of pressure independent balancing & control valves (PICV) and why have Danfoss customers converted from conventional balancing solutions to the PICV.
Manual balancing valves
Manual balancing valves provide a static, basic balancing solution for many HVAC applications. The valves limit the flow through different parts in heating, cooling and domestic hot water systems. Since manual balancing valves can not react to changing conditions, the valves are recommended to be used in constant flow systems.
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 and provide high indoor comfort and energy efficiency in public and commercial buildings.
Actuators for PICVs
To take advantage of the combined balancing and control features of Danfoss AB-QM it has to be equipped with actuators controlled by room thermostats or a Building Management System. Danfoss offers a broad range of actuators varying from thermal on-off to digital step motor actuators with bus communication.
Motorized control valves and actuators
Motorized control valves ensure perfect control and efficiency for every building and application. Danfoss Motorized Control Valves (MCV) for district heating and cooling, HVAC and central heating systems ensure stable and accurate control of water, glycol mixtures and steam.
Increased importance for safe Domestic Hot Water systems due to Covid-19
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.
How to balance HVAC systems in “Shell and Core buildings”
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.
Outstanding HVAC flexibility after high-end office building renovation
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.
Smart HVAC control solution for the I-tower at WTC Amsterdam, the Netherlands
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
High-end climate solutions in Waldorf Astoria by Hilton, Amsterdam, the Netherlands
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.
Energy comfort in Prime Tower, Zurich, Switzerland
The Prime Tower in Zurich is a building of many records. With its 126 meters it is the tallest building in Switzerland with 36 floors and 40,000 square meters accommodating mostly offices. And with its more than 6,000 AB-QM valves it is also one of the biggest heating and cooling installations ever designed and installed by Danfoss.
New: Digital Design Center – one entry point for all design needsFriday, April 17, 2020
Design engineers, specifiers and consultants are under a constant pressure when looking or the best solutions for their designs and customers. To simplify their work and save time, we have developed a new online platform – Digital Design Center.