Masu dumama bututu suna da kyau don dumama ƙarancin iska mai ƙarfi ta hanyar dumama convection.Don yanayin sanyi da ɗanɗano, zafin iska mai gudana na bututun zai ragu a hankali a bangon bututun.Don wannan yanayin, injin bututun iska zai zama da amfani don samar da zafin da ake buƙata don dumama ginin.Ƙira mai sauƙi da shigarwar injin bututu shine babban fasalin wannan samfur.