My sister also recently put carpet all over the house, and the consultant said the same thing! The Dyson DC 40 has a lot of power, and it can damage the fibers on your carpet and cause it to wear out faster. The consultant advised my sister to buy a small vacuum cleaner that would do the job well, he even suggested one site
https://www.popularvacuums.com/articles/vacuum-cleaner-buying- [popularvacuums.com]guide.htmlguide.html where you can read the characteristics of the vacuum cleaner and reviews. So I recommend listening to the consultant and buying a small vacuum cleaner.