Bazi reLEAWOD USA rakawana chitupa cheNFRC chepasi rose chemikova nemahwindo, uye LEAWOD yakasimudzira zviri pamutemo zita remuchina wepasi rose wemikova nemahwindo.
Nekuwedzera kwekushomeka kwesimba, kuvandudzwa kwezvinodiwa zvekuchengetedza simba zvemagonhi nemahwindo, National Fenestration Rating Council (NFRC) neEnergy Star Program yeUS Department of Energy neEPA vanga vachipa humbowo hwekushanda kwekupisa kwemagonhi nemahwindo kubvira muna 1989. NFRC, sangano risingabatsiri rakatora label itsva yeEnergy Consumption performance muna 2005, rinowanzoda chitupa cheNFRC chekushanda zvakanaka kwekupisa kwezvigadzirwa zvemagonhi nemahwindo eUS. Pamusoro pezvo, chitupa cheNFRC idanho rinodiwa kuti uwane chitupa cheEnergy Star. Danho idzva, LEAWOD ichakwikwidzana nemabhizinesi epasi rose emagonhi nemaWindows akanakisa, anouya, akagadzirwa muChina.