Igatsha le-LEAWOD lase-USA lithole isitifiketi samazwe ngamazwe se-NFRC somnyango newindi, i-LEAWOD ethuthuke ngokusemthethweni ngomnyango wamazwe ngamazwe kanye nophawu lwewindi phambili.
Ngokushoda kwamandla okwandayo, ukuthuthukiswa kwezidingo zokonga ugesi ezicabheni nama-Windows, i-National Fenestration Rating Council (NFRC) kanye nohlelo lwe-Energy Star loMnyango Wezamandla wase-US kanye ne-EPA bezilokhu kuqinisekisa ukusebenza okushisayo kweminyango nama-Windows kusukela ngaleso sikhathi. 1989. I-NFRC, inhlangano engenzi nzuzo eyamukele ilebula entsha yokusebenza kwamandla e-Consumption ngo-2005, ivamise ukudinga isitifiketi se-NFRC sokusebenza kahle kokushisa kwemikhiqizo yase-US yomnyango namawindi. Ngaphezu kwalokho, ukuqinisekiswa kwe-NFRC kuyisinyathelo esidingekayo esibhekise ekutholeni isitifiketi se-Energy Star. Isiteji esisha, i-LEAWOD izoqhudelana nezicabha ezinhle kakhulu zomhlaba kanye namabhizinisi e-Windows, enziwe e-China.