Vapor retarders slow the rate of vapor diffusion into the thermal envelope of a structure.

This allows existing home and business owners to conserve energy by creating a thermal envelope in their existing structure.

Next, and even more important, he said, is to determine the "thermal envelope" of the area.

The thermal envelope, he said, is the insulative boundary between the heated area of a house - typically the living area - and the unheated portion.

It has a similar thermal envelope of 34 W and the same 667 MT/s FSB rate.

Puncturing the thermal envelope of something that needs to withstand -40 C temps doesn't seem so smart to me.

Energy conservation is really only achieved by sealing ductwork that is outside the thermal envelope or connected to the outside.

The thermal envelope defines the conditioned or living space in a house.

The second consideration is the high thermal mass, which applies to walls and floors, or wherever the concrete is used within the thermal envelope.

The thermal envelope (or heat flow control layer) is usually different than the building envelope.