From the temperature gradient on the cold side of the insulation ( equation ( ) ) a transmission heat loss or U-value for a dynamically insulated wall, U dyn can be calculated ( Table 1)
32.
In areas below foundation level ( or, subgrade areas ), particularly those formed in concrete, vapor retarder placement can be problematic, as moisture infiltration from capillary action can exceed water vapor movement outward through framed and insulated walls.
33.
This added vapor barrier will make essentially two vapor barriers ( a no-no in insulated walls ), but when the wall finish ( plasterboard or paneling ) is installed, it will press the two barriers together, making essentially one vapor barrier.
34.
For a vertical internal surface this thermal resistance has a value of 0.13 m 2 K / W . In a dynamically insulated wall, as the conduction heat flow into the wall increases then so does the temperature drop across this internal thermal resistance increase.
35.
:Unless you have very well insulated walls, ceiling, floor, doors and windows, a unit of this rating will not be sufficient to get the temperature down to near freezing in summer, but it should reduce the temperature to perhaps 20 or 30 degrees below the surroundings if doors, windows and other ventilation inlets are all closed ."
36.
A large underground space with thick insulated walls was connected to a qanat, and a system of windcatchers or wind towers was used to draw cool subterranean air up from the qanat to maintain temperatures inside the space at low levels, even during hot summer days . As a result, the ice melted slowly and was available year-round.
37.
In my view the natural trade-off is a broad public right to inquire ( i . e ., listen to the radio, point infrared sensors around, make video recordings, analyze the data from the sensors with computers, etc . ) and the right of the individual to employ protection from surveillance ( cryptography, insulated walls, wearing a mask, using pseudonyms, etc . ).
