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 kwezimfuneko zokonga amandla eminyango 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 ngo-1989. I-NFRC, inhlangano engenzi nzuzo eyamukele ilebula entsha yokusebenza kwamandla e-Consumption, i-US kanye nelebula yokusebenza kahle komnyango we-US 20 kanye nokusetshenziswa kahle kwe-NFRC imikhiqizo yewindi. Ngaphezu kwalokho, ukuqinisekiswa kwe-NFRC kuyisinyathelo esidingekayo esibheke ekutholeni isitifiketi se-Energy Star. Isiteji esisha, i-LEAWOD izoqhudelana nezicabha ezinhle kakhulu zomhlaba kanye namabhizinisi e-Windows, enziwe e-China.