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Danfoss

Air handling units

High-accuracy AHU performance

Establishing the most accurate air exhaust temperature from the Air Handling Unit requires the most accurate control of water flows into the heat exchangers for heating or cooling the entry air flow. In most cases a variable flow system is used for this. The best results, in both full- and partial load conditions, can be achieved by using Pressure Independent Balancing and Control Valves (PIBCV). They are simply set to the required flow under full load conditions and function as automatic flow limiter. In partial load conditions the actuator accurately reduces the flow according needs. No overflow situation will occur, increasing the energy efficiency of the heat or cooling source.

For an alternative solution with a constant flow system, regular Motorized Control Valves and Manual Balancing valves to determine the maximum flow can be used.

To be able to service the control valves it is recommended to install manual shut-off valves.

Danfoss also offers a range of electrical actuators for dampers. They control the amount of air entering the air handling unit by positioning the dampers in any position between 0-90 degrees angle. These can cover a damper surface of up to 8 m2.

To protect frost sensitive parts of an Air Handling Unit, it is possible to install self-limiting electric heating cables. These increase their heat the output as the environment temperature reduces.

Energy-lean AHU performance

Danfoss AC drives enable you to optimize energy efficiency, never compromising on the safety and comfort of the occupants of your building.  Danfoss solutions help you comply with increasingly stringent efficiency standards while ensuring perfect indoor air quality and safety, by minimizing the spread of airborne infections. Ensure thermal comfort for building guests, staff and residents while simultaneously addressing large energy bills.


Enjoy reliable, economical indoor climate control using AC drives. You get the the lowest Total Cost of Ownership (TCO) in the market: adapt capacity to actual demand, reduce operating costs, and reduce wear and tear on your installations.

How we can help you

  • Complaint free indoor comfort

  • Energy optimization

  • Cost savings

  • Accurate air temperature exhaust

  • Reliability

  • Ease of service, maintenance and repairs

AB-QM pressure independent balancing and control valves

Enjoy simple affordable comfort and control hydronic flow with Danfoss AB-QM™ pressure independent balancing and control valves.

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