I use a ve 300 dual zone to run a space heater on one zone and a short length of heat tape for a single cage on the other. Works great. The only problem is that they are only rated for 900w total. So a lot of space heaters would use up that total amount if not more. But I use a 700w space heater and it controls the small Herp room to within .1 degree. It also has a night drop feature that I don't actually use. It wasn't particularly cheap though. But I personally feel when it comes to thermostats that you should buy the best there is. After all if its off it could mean loosing your collection.