1.Capacity, 15-20t fun ipele;
2.Low otutu iru, kekere bajẹ oṣuwọn;
3.Batched ati ki o san iru ọkà togbe;
4.Indirect alapapo ati ki o mọ gbona air fun gbigbe ohun elo lai eyikeyi idoti.
1.Capacity, 10-12t fun ipele;
1.Small agbara, 5-6t fun ipele;
1. Iwọn giga ti adaṣe, iṣakoso ọrinrin deede;
2. Iyara gbigbe gbigbẹ, ko rọrun lati dènà ọkà;
3. Aabo giga ati iye owo fifi sori kekere.