my mother had a burm that was between 17-18 feet while i was growing up, i currently have my burm in a 6x2 and she is 9 feet. and its starting to get cramped.
i will be building my burm a 12x6x6 cage for her adult cage, i agree with x-factor he is not one to argue with man, sit back take some advice and learn.
the bare minimum for a burm in my opinion is a 8x3, and if you properly set up the cage, which means you will have a water bowl big enough for them to soak in you are probally going to have a 3x3 or bigger water bowl in there for them to soak, now you are down to 5x3 of space left. you need to plan out for things like this, personally my burm is going to have a pond to soak in. less inst better my friend and if that is how you feel about snakes maybe you are in this for the wrong reasons, you should have pets because you want to spoil them, not because you want to slap them in bare minimums or LESS, and call it good.
adult burm 8x3 minimum.
uth, not great but for some people it works.
radiant heat panels will last up to 40 years runs at like 15 watts extremely efficient and will be all you need.
before you start telling people like x-factor to shut up because he doesnt know anything or because you think he only has a 7 foot snake, give the man a chance he is pretty smart to.