I agree with JTrott. As long as the room is up to 85 to 89 degrees theres no need to even have the flexwatt. You could use a small oil heater to keep the room at that temp.
Depending on the size of the snake room (if small) the flex will heat the room to the temp u want. Idk if i was just luck or what but i set my flex to 90 and the room stayed at around 86. While the rest of the house is kept a 75.