Room heating.

[capsicum]

We lucked out...our herp room is right above the furnace room of this building, so our master bedroom (yes, the animals have the master bedroom, lol), and bathroom stay at 80F constantly (with the exception at night, it dips a little). The enclosures are heated individually, then the room stays warm as well.
I do use a small heater/fan thing (new) to help some cages stay warmer, and also have a regular fan near the window and an air purifyer by the window as well, helps keep the rodent smell down a lot.

TK