Ua loaʻa i ka lālā LEAWOD USA ka hōʻoia ʻana o ka puka a me ka puka makani NFRC, ʻo LEAWOD i hoʻolaha mua i ka puka a me ka puka aniani i mua.
Me ka hoʻonui nui ʻana o ka ikehu, ʻo ka hoʻomaikaʻi ʻana i nā koi mālama ola no nā puka a me nā Windows, The 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 Windows mai ka wā. 1989. ʻO ka NFRC, kahi hui waiwai ʻole i hāpai i ka lepili hana hoʻohana ʻenehana hou i ka makahiki 2005, koi pinepine i ka NFRC thermal efficiency no nā huahana puka a me nā puka makani US. Eia kekahi, ʻo ka hōʻoia NFRC kahi hana kūpono i ka hōʻoia Energy Star. ʻO ke kahua hou, ʻo LEAWOD e hoʻokūkū me nā puka maikaʻi loa o ka honua a me nā ʻoihana Windows, hele mai, hana ʻia ma Kina.