While LibGen and Sci-Hub contain many pirated textbooks, they are in the malicious sense, but they are still copyright infringing. Additionally, your university network may block them. Use only if you fully understand the legal risk. Instead, try Internet Archive (archive.org) – some older heat transfer books are legally hosted there, though R.K. Rajput may not be.
Searching for a "repack" of Refrigeration and Air Conditioning While LibGen and Sci-Hub contain many pirated textbooks,
And so, the legend of the "Refrigeration and Air Conditioning by R.K. Rajput PDF free download repack" lived on, a testament to the power of shared knowledge and the impact one resource can have on the lives of many. they are in the malicious sense