ERT - 12BST 1.2KW/ 2~3평 1032Kcal/h 160*400*670mm   ERT - 15BST 1.5KW/ 3~4평 1290Kcal/h 160*500*670mm   ERT - 20BST 2.0KW/ 4~6평 1720Kcal/h 160*600*670mm           ERT - 25BST 2.5KW/ 5~7평 2150Kcal/h 160*700*670mm   ERT - 30BST 3.0KW/ 6~8평 2580Kcal/h 160*800*670mm