01Create a warm-to-cool route
Think about how the animal actually moves through the enclosure. A basking ledge can be placed in the warm zone while a hide or shaded retreat sits farther away. In taller enclosures, temperature can vary vertically as well as from one end to the other, so measure the places the animal is likely to use.
02Choose the heat style for the behaviour you want to support
Overhead basking heat, non-light-emitting heat and contact-style heaters behave differently. The choice should make sense for the species, enclosure and time of day it is intended to be used. Do not add a second heater simply because one corner feels cool to your hand; measure the enclosure and decide whether the animal actually lacks a suitable choice.
03Protect the animal from hot hardware
Heat fittings, guards and ceramic elements can become very hot. Plan clearances so the animal cannot press against unsafe surfaces or climb onto fixtures. Custom climbing routes should deliberately lead away from hot fittings rather than giving the animal a convenient ladder straight to them.
04Test through normal room conditions
Room temperature changes through the day and across seasons. Once the enclosure is running, record how it behaves during the actual conditions in the room. That information is more useful than copying somebody else’s thermostat setting.