This is something I am very interested in. I am working to design a snake room where there is a small insulated room built inside of the snake room, (right in the middle). And when the tubs are slid into this insulated room half of the tub goes into this inner "room" while the other half of the tub is on the other side of the insulated wall and exposed to the outer "room". That way I could do away with heat tape altogether and just keep the inner room in the low 90s and the outer room around 80. And tubs could be housed in all four sides of the inner room leaving about a four foot walkway around the outside. Looks good on paper!