This is due to the building, is open in each direction and more exposed to adverse weather phenomena such as winds, frost, high summer insulation, rain, etc. . Comparing the block of flats in the same area (on the middle floor) of a single-family home for energy to escape:
Hii ni kutokana na ujenzi wa, ni wazi katika kila mwelekeo na zaidi ikipata matukio mbaya ya hewa kama vile upepo, baridi, high majira insolation, mvua, nk . . Kulinganisha block ya kujaa katika eneo moja (sakafuni katikati) wa moja – familia nyumbani kwa ajili ya nishati ya kutoroka: