Heat efficient terrarium for Ball Python

[Ghostly]

Looking to upgrade my Ball Pythons tank, although not sure exactly what the best option would be... We live off grid so need something that will hold heat well. PVC seems to be the best option although I am still not sure exactly what terrarium to buy... She will be living in my room with is colder then the rest of the house as well.

Here is one of the ones I am considering, although thinking maybe heat might still escape from through the heat lamp box?
ses-series-4-pvc-enclosure

Would be great if anyone has any suggestions or ideas keeping in mind the fact that we have limited electricity and would preferably only be using one heat source.

Thanks in advance!

 

[SecretiveFish]

PVC is definitely going to be better than glass, but you may need to wrap with insulation to keep in most the heat (while making sure to keep the vents 100% clear). Some heat is going to escape through the vents but that is unavoidable.