H - chitsulo chachitsulo ndi chitsulo chatsopano chomanga chuma.Mawonekedwe amtundu wa H mtengo ndiwachuma komanso wololera, ndipo mawonekedwe amakina ndiabwino.Pogubuduza, mfundo iliyonse pagawolo imafalikira mofanana ndipo kupsinjika kwamkati kumakhala kochepa.Poyerekeza ndi I-mtengo wamba, H mtengo uli ndi ubwino wa gawo lalikulu modulus, kulemera kwake ndi kupulumutsa zitsulo, zomwe zingathe kuchepetsa nyumbayo ndi 30-40%.Ndipo chifukwa miyendo yake ndi yofanana mkati ndi kunja, mapeto a mwendo ndi ngodya yolondola, kusonkhana ndi kusakaniza m'zigawo, kukhoza kupulumutsa kuwotcherera, kugwira ntchito mpaka 25%.Nthawi zambiri amagwiritsidwa ntchito m'nyumba zazikulu zomwe zimafunikira mphamvu yayikulu yonyamulira komanso kukhazikika kwagawo (monga nyumba zamafakitale, nyumba zazitali, ndi zina zambiri), komanso Milatho, zombo, makina onyamula, maziko a zida, bulaketi, mulu wa maziko, ndi zina.