In addition, by plastering the walls with a paste composed of sand, clay, and molasses ​ — which improves insulation and thus reduces heat loss — ​ the efficiency of the ovens has been increased by 15 percent.
Turklāt, apmetot krāsnis ar javu, kas pagatavota no smiltīm, māla un melases, un līdz ar to uzlabojot siltumizolāciju un samazinot siltuma zudumus, krāšņu efektivitāte ir palielināta par 15 procentiem.