low noise high efficiency long longevity italy firing machine This product is widely used for heating in farm green houses, horticulture flowers and plants planting, and animal husbandry houseyihe Automatic Coal-burning Heating Machine Features:1) Consumption: 50,000 / 100,000 / 200,000kcal2) Heating supplying area: 300 / 600 / 1,200m23) Stainless steel alternative machine, contenting high ...