About inverter technology for AC, heating and ventilation
A quantum leap in energy efficiency
The HVAC market is rapidly changing. AC inverter drive technology is the most energy efficient technology and is currently revolutionizing the way air conditioning systems are being designed and built to meet climate control needs around the world. The first to embrace variable-speed technology gains a competitive advantage.
Market needs: Avoid system oversizing, reduce electricity bill and inrush current, increased comfort and process are some key drivers for variable capacity.
Modulating technologies: There are several ways to modulate the cooling capacity in refrigeration or air conditioning and heating systems.
Working principle: Inverter compressors operate at different speeds generating a modulated refrigerant mass oil flow and cooling output.
Video "Inverter Compressors for HVAC"
Benefits: Better power supply quality, system diagnostics, humidity control, energy savings, accurate temperature control, less noise, process safety, greater comfort
Challenges: Compressor and drive selection, designer skills makes the system overall reliability and efficiency.

Danfoss variable speed technology
By using the Danfoss inverter compressor solutions, significant energy savings can be achieved compared to traditional on-off compressors or mechanically-modulated technologies.
Highlighted products
Related applications
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Modular chillers
Core component of the HVAC system, a chiller cools the water or brine used to cool and dehumidify air in buildings or industrial processes. It's a factory-assembled unit that cools the water or brine using an evaporator, and has an internal or a remote condenser with appropriate controls.
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Packaged unit
Cooling of IT equipment in data centres is an increasing challenge for operators and design engineers. Power management is the major challenge, with energy consumption and heat loads increasing in step with the server density. Meeting these challenges is essential for ensuring the safety and availability of the data.
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Process cooling
In many industrial processes the machinery or processes generate heat which requires cooling, to protect the equipment and/or to ensure that the product being manufactured is of the required quality. The process cooling unit is used to cool, to extract humidity or regulate the temperature of the manufacturing process.
Learning
Online training and e-lesson about inverter technology
Welcome to the Danfoss online training portal! Through this service, Danfoss strengthens its support to all HVAC-R professionals and students. Sign-up today for a great opportunity to maximize your performances and profits!
What’s in it for me?
- Learn about the existing technology from the leader in variable speed / inverter compressors.
- We offer free e-lessons, online courses and face-to-face seminars illustrated with technical explanations, videos and in field experiences.
Just follow these quick steps to start:
- Register on Danfoss learning Platform.
- Attend the e-lessons by clicking on below links
Case studies
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Denmark's new climate-friendly hospitality giant depends on Turbocor® oil-free chiller
The new Alsik hotel in Southern Denmark sets a higher standard in energy-efficiency and is built to reach 76% CO₂-neutrality. A main contributor is the 900-kW chillers by Clint (a company of G.I. Industrial Holding) which features award-winning Danfoss Turbocor oil-free compressors.
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Oil-free compressors maintain consistent performance over time
Danfoss conducted a study to see how long term operation affected performance on Danfoss Turbocor® compressors. The results showed that oil-free, magnetic bearing compressors maintained consistent performance even after 10+ years of operation.
News
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Coolselector®2: We did complex. You do awesome.Wednesday, March 20, 2019
Coolselector®2 is essential software for engineers, consultants, and system designers who work in the refrigeration and air conditioning industry. Using Coolselector®2, you can easily optimize energy consumption and increase efficiency in your HVACR system — simply run calculations based on your operating conditions and then choose the best component setup for your design.
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New 8.5 TR and 11 TR variable speed compressors with IDVWednesday, October 10, 2018
New efficiency opportunities for Chiller/Rooftop units and Computer Room Air-Conditioners
Danfoss has added new 8.5 TR and 11 TR (*) variable speed compressors with IDV(**) to its popular VZH range, giving commercial cooling manufacturers the market’s most complete choice of variable speed scrolls with qualified drives for HVAC systems.
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New extension of Danfoss ATEX Lab accelerates the use of sustainable refrigerantsFriday, September 21, 2018
With 100 customers, journalists, and employees in attendance, the ribbon was cut and the doors to our newly extended ATEX lab were opened yesterday. This facility will speed up the testing of refrigerant options for compressors, easing the transition to more sustainable refrigerants.
Contact us
For further information, please contact us.