I've had my Nepenthes grow tent up for a couple weeks, and I have been recording the day/night temperature to get a feel for what conditions I get with no supplemental heating/cooling. I've been recording the min/max temps for each day, as well as the % humidity (I addressed this in another thread, found out I really need a humidifier!), so I can address any issues before they become problematic, and also so I can select appropriate Nepenthes varieties for my conditions in the future.
Over that past 2-3 weeks, my day temps have ranged from 85-92f and my night temps have ranged from 63-69f. I feel like this is somewhere on the border between "lowland" and "intermediate". When I made my first Nepenthes order, I played it safe and only got hybrids with one highland parent and one lowland parent.
I feel like my temperatures are good for most lowlanders and lowland hybrids, as well as some of the easier intermediate/highlanders (maxima, ventricosa, alata, etc.). What other varieties should do well in this temperature range? One species I am very interested in growing is N. veitchii "highland", but I think my temps might be a bit on the warm side for it.