Originally Posted by Emc
I'm honestly wondering if the tin-foiled covered sides are of any benefit at all.
The lid of your cage appears to be uncovered, yet all the sides are sealed... your heat is going to rise and escape. all sides covered or not; the roof is exposed. If you wish to continue to use the unregulated CHE, you need to cover at least half of the roof if you want the heat to remain trapped. Covering at least some of the roof should be far more effective that sealing all four sides.
When I said about the idea I said to do half the top dotted and then some the bars on the sides as it will help bounce heat around the cage longer.
(You can see if you go to the other thread that was talking about keeping the cage warm)
Also I said to get the thermostat rather than worrying about the holder its in, but other people made it seem like the dome was hugely important, so when it came to the choice of one or the other as the done seemed to get focused on a lot I can see why the dome was picked.