LEAWOD reshen Amurka ya sami NFRC kofa ta ƙasa da ƙasa da takaddun taga, LEAWOD ta ci gaba a hukumance ta ƙofar ƙasa da alamar taga gaba.
Tare da ƙara ƙarancin makamashi, haɓaka buƙatun ceton makamashi don ƙofofi da Windows, Majalisar Fenestration Rating Council (NFRC) da Shirin Tauraron Energy na Ma'aikatar Makamashi ta Amurka da EPA sun tabbatar da aikin thermal na kofofi da Windows tun 1989. NFRC, ƙungiyar ba da riba wacce ta karɓi sabon alamar amfani da makamashin lantarki, sau da yawa 2000000 na cenfification na USC. kayan kofa da taga. Bugu da kari, takardar shedar NFRC mataki ne da ya wajaba zuwa takardar shedar Energy Star. Sabon matakin, LEAWOD zai yi gogayya da kyawawan kofofin duniya da kamfanonin Windows, wanda aka yi a China.