@sanjibasenji Our first Basenji was a sun worshiper. He'd lay out on the concrete patio a good part of the day and just soak up the heat. As he got older, and especially after his stroke, I had to watch him closely. He became much more heat sensitive, but seemed unaware of it. The two newbies... can't quite tell just yet. They do sun, but not quite as much as the first. Might change. Who knows.
One thing I have heard, but have never bothered to fact check it is this: A Basenji's internal temperature runs about 2 degrees higher than most all other breeds. This adaptation allows them to tolerate hotter ambient temperatures better than most all other breeds; however, it's also responsible for their lower tolerance to colder ambient temperatures.
No idea if it's true. Can't recall if I heard it or read it.