MissMorbus,
The only special thing I did was place a humidifier on my furnace so the air was not so dry in the winter.
I find that Neps are a lot tougher then they are given credit for.
When I was first reading about them and the high humidity requirements they need, I thought I would never be able to keep one outside a terrarium.
Since neps can get large I did not want to confine the plant into a terrarium. So I started to experiment with growing them as windowsill plants and have had great success with several neps this way.
It seems that they take around 3 months to really settle and then start pitchering.
Winter humidity: 30 - 50% (I have the humidifier on my furnace set to around 45%. Lower humidity in the day because the furnace does not run much. The sun shines in the room where I grow the plants and heats the area up.)
Winter / Fall temps: I keep the house cool. Heat set to 64 degrees. (Humidified air feels warmer then dry air) During the day it can hit mid 70's with the sun shinning in the room where I grow the neps. Nights can drop to low 60's.
Spring / Summer / Fall humidity: 30 - high 80%. (Windows open and such)
Spring / Summer temps: During the day it can hit mid 80's. Night to the low 70's. (I usually have the A/C set around 74)