I whiwhi te peka o LEAWOD USA i te tiwhikete tatau me te matapihi o te ao NFRC, ā, kua whakatairangahia e LEAWOD te waitohu tatau me te matapihi o te ao.
I te pikinga ake o te korenga o te pūngao, me te whakapainga o ngā whakaritenga penapena pūngao mō ngā tatau me ngā matapihi, kua whakamanahia e te Kaunihera Whakatauranga Fenestration National (NFRC) me te Kaupapa Energy Star o te Tari Pūngao o Amerika me te EPA te mahi wera o ngā tatau me ngā matapihi mai i te tau 1989. Ko te NFRC, he whakahaere kore-moni i tango i te tapanga mahi Whakamahinga Pūngao hou i te tau 2005, he maha ngā wā e hiahia ana kia whiwhi tiwhikete pai wera NFRC mō ngā hua tatau me ngā matapihi o Amerika. Hei tāpiri, ko te tiwhikete NFRC he taahiraa tika ki te tiwhikete Energy Star. I te atamira hou, ka whakataetae a LEAWOD ki ngā umanga tatau me ngā matapihi pai rawa atu o te ao, haere mai, i hangaia ki Haina.