Building a rack for living room. Another temp question.

[satomi325]

When using back heat in your rack is it generally one strip down inside the back wall of the rack? I assume it gives you an 88+ degree hot and 78+ degree cool sides of the tub. Sounds much easier than belly heat. I never considered putting a door on the front. I bet that does wonders for ambient air temp.

Back heat is one strip of flexwatt down the back. It heats up the air to create a heat gradient compared to belly heat, which creates a hot spot.
Back heat is only easier if your ambient temps are around 75-80. Since it's heating up the air, the actual flexwatt is hotter than if you were doing belly heat.
It's not effective if your room temps are low.

I used back heat for a while. I loved it, but the flexwatt had to maintain 120 degrees in order to get a 90 degree hot side and 80 cool side in the tub.My room temp was 70-75. Flexwatt isn't designed to safely run over 100-105 degrees, so I wasn't comfortable with that hazard. I switched the belly heat, and the flexwatt runs at 98 degrees to achieve a 90 degree hot spot and 80 cool side.

I only have the door to maintain winter temps and to keep unwanted eyes out (maintenance - I live in an Apartment). And I also have friends who have phobia of snakes. So I just close the door when people come over.
The only issue I have with the door is that the snakes are in darkness. I like to allow them some natural light, which is why I tend to just close it at night (where the temps are the coldest anyway).

I am wondering what will heat inside the tubs better bottom heat or back heat. I was thinking of using bottom heat and using the same size of flexwat in every shelf. I think I would have to make grooves in the shelves for the wires. Does the tubs rubbing on the flexwatt wear it out fast?

Also what size of tub do I need for an adult female? I want to make sure it is big enough for any ball python. I will work out my plan for smaller tubs later.

It depends on your ambient room temps.
Back heat is easier if you can maintain room temps high enough. If your house is cooler, belly heat is more effective and safer.
You don't need to make grooves in the shelf for wires. You can just tape it down using foil tape.
The tubs do rub on the flexwatt, but it should be good for a few years before you replace it. The foil tape covers the edges of the flexwatt, protecting it from too much wear.

Hatchling - 6 qt tubs
500 grams or less - 15 qt tubs
500 grams or more - 28-32 qt tubs
Snakes under 2000 grams - 28 or 32 qt tubs.
Snakes and big girls above 2000 grams - 41 qt tubs.