Listed materials for the 200-liter horizontal drum kilns are relatively inexpensive and widely available. ATA states that kiln materials add
up to 480 baht (p. 30). According to the Thai language manual Producing Charcoal and Wood Vinegar (การผลิตถ่านและน้ำ�ส้มควันไม้), the cost of
one unit is 800 baht. Such kilns can reportedly be used up to three years (Wiraphong, 42).