BNN (China) Electronic Limited is the largest professional manufacturer of ventilation and heating system in China. Our products included but not limited to Exhaust fan, bathroom fan, air curtain, HVAC and etc. We focus our sales to supply reliable products to customer who care the high quality, such as B&Q, OBI, Homemart, Wal-mart and etc. In China, we selling our products in our Brand "BNN", which is the No 1 brand in the ventilating and heating industry in China, with a new 600,000 square foot factory, BNN is the largest manufacturer in China.for more information, please visit our web .cn .