Ua loaʻa i ka lālā ʻo LEAWOD USA ka palapala hōʻoia puka a me ka puka makani honua NFRC, ua hoʻolaha kūhelu ʻo LEAWOD i ka hōʻailona puka a me ka puka makani honua i mua.
Me ka hoʻonui ʻia ʻana o ka nele o ka ikehu, ka hoʻomaikaʻi ʻana i nā koi mālama ikehu no nā puka a me nā puka makani, ʻo ka National Fenestration Rating Council (NFRC) a me ka Energy Star Program o ka US Department of Energy a me EPA ua hōʻoia i ka hana wela o nā puka a me nā puka makani mai ka makahiki 1989. ʻO ka NFRC, kahi hui waiwai ʻole i lawe i ka lepili hana hoʻohana ikehu hou i ka makahiki 2005, koi pinepine i ka palapala hōʻoia pono wela NFRC no nā huahana puka a me nā puka makani US. Eia kekahi, ʻo ka palapala hōʻoia NFRC kahi ʻanuʻu pono i ka palapala hōʻoia Energy Star. ʻO ke kahua hou, e hoʻokūkū ʻo LEAWOD me nā puka maikaʻi loa o ka honua a me nā ʻoihana puka makani, e hele mai, i hana ʻia ma Kina.