Our company is a leading manufacturer of heat recovery ventilation and ventilators in China. We can offer all the related products of the ventilation system. We have ISO9001:2008 quality system certificate. Our factory covers over 12,000 square meters. Our total sales are over RMB100 million per year. We also provide OEM service for some world-famous brands. Our products have independent intellectual property rights, and obtained some national patents. Our products have passed CMA detection of National Household Electrical Appliances Quality Supervision and Testing Center. Our product...