I have a remote digital thermometer nailed to the inside of my TBH about 3/4 way back.
Hive dimensions: 43" long
18" wide at the top tapering to 11" at bottom
The hive floor has a 2" screened bottom and sits about 2" above on a wooden bench on bricks.
The entrance to the hive is the width of the bottom: 11"
The cover is metal. When the summer temperature lingered around 100 F and above, I put a Styrofoam board in the cover for insulation.
The temperature stays a constant 98.8 F whether it is below 0 or 104 degrees. It is in full sun.
The hive is a May '12 swarm from one of my hives. It was the second swarm from the hive, hence the queen was virgin. In 6 weeks it was entirely filled out. It is healthy and very active. A bit of burr comb in the back behind the thermometer.
I placed a copper twisted ring around the TBH and a crystal on top of a Bee CD (fractal patterning transfer set up).