E-Star freezers - how so efficient ?

[Who]

Originally Posted by Christ

This is also why, when you want to keep heat in your house, you insulate the ceiling, not the floors.

One insulates the ceiling more because of the convection of air inside the house, but the walls and floor are still very important to keep in balance because there are more forms of heat transmission happening in the house than just convection. The ground below tends to be warmer than outside so there is a smaller ΔT but you'll still lose heat in that direction. The envelope of any heated or cooled structure is as good as its weak points. What happens if you install radiant heat and you don't insulate below the floor? Will it work as well?