The Danfoss AB-QM is a money-saving device:
Fewer products, with less installation work to do
Easy sizing, and fewer calculations
Set and forget, no commissioning
Better comfort, fewer complaints and less service required
Always the right flow, no energy wasted
Reducing costs often means a trade-off: You have to sacrifice something, such as comfort or quality, in order to make the savings.
The Danfoss AB-QM reduces the costs and raises the quality of the installation, it's a real win-win situation.