Furnace - This of course heats your whole house and basically means you will turn you're entire home or apartment's thermostat up to keep everything warm. This will of course heat the air very well, however, it can get very, very expensive and most people will not be able to live in the same temperature that a hedgehog needs. It also will be very difficult to keep the temperature consistent from day to day.
Space heaters - These come highly recommended, both by us as well as other breeders, because they heat the air very well and work with all cage types. They heat the air with heat coils and fans, ceramic heaters, or are oil filled. Space heaters will heat the air in the whole room and have a built in thermostat that will automatically turn off the heater once they reach a designated temperature. The bad thing about these heaters is they can be a fire hazard. They also use more energy than some other options because they are heating more than just the cage.
Heating Pads/Rocks/Disks - We do not recommend the use of any of these items to heat your cage. The only time they should every be used is in an emergency type situation. These items have been known to cause burns, and they are very hard to regulate the temperature as they will only heat the floor or a certain area of the cage, not the air in the cage. Also, the hedgehog may not know to move off the heat, or is unable to move off the heat, and often times this is when the damage is caused. It may not be apparent right away, but will be noticeable a few days later.
Snuggle Bags/Liners - Fleece snuggle bags and fleece liners are okay to have in your cage at all times, however, these are not suitable to use as your primary heat source. Your hedgehog will not stay warm enough with just the use of these items, as the entire age needs to be the appropriate temperature. These items will just keep the hedgehog a little more snug, not keep the cage warm.
Dome/Lamp - The dome for the bulb should be 8.5 -10 inches. The larger diameter allows for the heat to distribute throughout the enclosure more evenly than the smaller domes.
Thermostat - This is a MUST if you are going to use a CHE. This will regulate the temperature. You set it to what temp you want the cage to be and it will shut on and off like a furnace to regulate the temperature. Do not think you can get a CHE without a thermostat, as you will have no way to control the temp in it.
Thermometer - As with any enclosure, a digital thermometer is a good idea so you can keep track of the temp inside your hedgehogs cage. There are many different brands on the market, but the digital ones work the best.