So let me get this straight, kitedemon brought a lot of factors that may or may not have confused me a little more but also opened my eyes, because I think since we both live in Canada, we face the "cold room" epidemic.

In response to using racks in a warm room. I have a space heater that will heat up my small snake room to 80 in about an hour, I have yet to buy a thermostat for this heater because it actually has an on/off thermostat of its own. I have found it very effective for the time being and if I set it just a little lower than the temps I want, there is very little chance of overheating the room. That being said, I should probably get a t-stat for it.

Secondly, in response to how you two said I should set up this rack. I have two Herpstats at the moment, I bought them because I realized they would have to be bought sometime or another, I'll have multiple racks and incubators in the future, so they were just an investment. That being said, I plan on using my regular Herpstat for an Incubator down the road. I have a Herpstat ND that I will be using for this rack. So is this how I would setup all of it?

1) All of flexwatt from AP rack plugged into my Herpstat ND. Set the temps to 90 F.
2) Buy an on/off thermostat. Plug the Herpstat ND into the on/off thermostat. Set the temps to 100 F? (Wouldnt it be more cautious to set it to around 97?)
3) Make sure the temps at the back of the tubs are 90~, and that my space heater is keeping the front of the tubs at 80~.

This will 100% work? I am just anxious now as to whether or not I should even order that rack anymore. And I also thought that you could only plug in HEATING elements into thermostats. I didnt know you could plug a thermostat into another on/off thermostat.

So let me get this straight.. is this how it works: Both of the t-stat probes are directly on the flexwatt. The Herpstat ND will be telling the flexwatt to go to 90 F degrees. If for some reason the Herpstat probe falls off or malfunctions or goes above 90.. as soon as it hits 100, the on/off t-stat will turn everything off? And when will it turn the power back on? I dont really understand the concept LoL