Nthambi ya LEAWOD USA idapeza certification ya NFRC yapakhomo ndi zenera zapadziko lonse lapansi, LEAWOD yotsogola mwalamulo khomo ndi zenera zapadziko lonse lapansi.
Chifukwa cha kusowa kwa mphamvu, kupititsa patsogolo zofunikira zopulumutsa mphamvu pazitseko ndi Windows, National Fenestration Rating Council (NFRC) ndi Energy Star Program ya US Department of Energy ndi EPA akhala akutsimikizira kutentha kwa zitseko ndi Windows kuyambira 1989. mawindo katundu. Kuphatikiza apo, chiphaso cha NFRC ndi gawo lofunikira ku chiphaso cha Energy Star. Gawo latsopano, LEAWOD idzapikisana ndi zitseko zabwino kwambiri zapadziko lonse lapansi ndi mabizinesi a Windows, bwerani, opangidwa ku China.