To be fair,
ALL Nepenthes need good humidity and a significant temperature differential between day and night in order to perform well, not just this species. There is a lot of hearsay/mythology about
this species that gets shared in discussion and for the most part it's baloney. (Except maybe the part about its slow growth, which is pretty accurate)
My plant does
not get "UHL" climate conditions by a long shot - in fact, this summer daytime highs in the greenhouse have typically hovered around 85F for hours each day. However, night temps
always drop to 60F or lower, often as low as 52F each night for much of the summer. That temperature differential
is important for long-term health of the
genus (notice I didn't say "
species"?) But it's important to point out that my plants would not be happy at those temperatures if there was not good air movement, high humidity (always above 70%, even when its 85 in there) and shadecloth to reduce light intensity.
I've noted in the past that people sometimes fixate on one or two cultivation details (such as upper temperature limits) and ignore all the rest of the (equally important) facets of Nepenthes care, and that is likely to result in unsatisfactory results. It is important to make an effort to meet
all of the cultivation requirements for the plants you care for, not just some of them. "Two out of three ain't bad" is a great lyric for a song, but it's not going to do much to advance your horticultural skill set.
https://nitrogenseekers.files.wordpress.com/2015/06/img_8849.jpg