Cylindrical structures used for this purpose only properly function if their radius exceeds a critical radius equal to k over h. Structures like junctions act as (10[1])“bridges” that impede this purpose by having high psi-value. This purpose is the primary reason why a certain material may be “double-glazed” or “low e.” (10[4]-5[1])Materials (-5[1])used (10[1])for (10[1])this purpose (10[1])are rated by their R-value, (10[3]-5[1])which is (10[3])additive (10[5]-5[1])for (10[1])materials (10[1]-5[2])layers stacked on (10[1])top of each other. (10[3])Materials (-5[1])used (10[1])for this purpose (-5[1])are formed (10[1])by spinning them like cotton candy (10[1])to create large (10[2])pockets (10[3])that trap (10[1])air. (10[3]-5[1])The (10[2])component (10[2]-5[1])of the (10[1])building (10[2])envelope (10[3])used for this purpose is typically (10[1])assessed (10[1])for using an infrared camera. (10[2])For 10 points, (10[2])fiberglass (10[2])wool is used in buildings (10[4])for what (10[1])purpose (10[3])due (10[1])to its low thermal conductivity? ■END■ (10[7]0[1])