Ichi ndichidule chachidule cha chipinda chowonetsera chatsopano.Zinthu zazikuluzikulu zomwe zikuwonetsedwa zikuphatikizapo mpweya wotentha kutentha, mpweya wochepetsera mpweya, makina opangira kutentha kwa HRV, makina opangira mphamvu ERV, mayunitsi ophera tizilombo toyambitsa matenda, mayunitsi ogwiritsira ntchito mpweya, etc.