According to the info listed it should be able to handle a rack. Out of the reviews listed it looks like three out of nine ratings were bad. One of them was a person not reading the specs of the unit and made a personal bad choice and the other two sound like they had a defective units. Since most people don't rate products that work as they should and dissatisfied customers are the most likely to rate an item it could very well be worth giving it a try. I would just be very careful as I just have not seen much info on the use of this in the reptile community. Granted of course when you look you don't see much feed back in the community on Habistat or Thermocontrol along with a big list of others. My experience to date though has been you get what you pay for.