Igatsha le-LEAWOD USA lithole isitifiketi se-NFRC somnyango namafasitela ngamazwe, i-LEAWOD yathuthukisa ngokusemthethweni uhlobo lwamazwe ngamazwe lomnyango namafasitela.
Njengoba ukwanda kokuntuleka kwamandla, ukuthuthukiswa kwezidingo zokonga amandla zeminyango namafasitela, i-National Fenestration Rating Council (NFRC) kanye ne-Energy Star Program yoMnyango Wezamandla wase-US kanye ne-EPA bebelokhu beqinisekisa ukusebenza kokushisa kweminyango namafasitela kusukela ngo-1989. I-NFRC, inhlangano engenzi nzuzo eyamukela ilebula elisha lokusebenza kwamandla ngo-2005, ivame ukudinga isitifiketi sokusebenza kahle kokushisa se-NFRC semikhiqizo yeminyango namafasitela ase-US. Ngaphezu kwalokho, isitifiketi se-NFRC siyisinyathelo esidingekayo sokuthola isitifiketi se-Energy Star. Isigaba esisha, i-LEAWOD izoncintisana neminyango namafasitela amahle kakhulu emhlabeni, ezenziwe eShayina.