We emphasize enhancement and introduce new solutions into the market just about every year for Slim Ventilation, villa fresh air ventilation sytem , residential HVAC system , Holtop Heat exchanger ,testkewords . Our company has been devoting that "customer first" and committed to helping customers expand their business, so that they become the Big Boss ! The product will supply to all over the world, such as Europe, America, Australia,Brazil , Spain ,Mexico , Portugal .More than 26 years, Professional companies from all over the world take us as their long-term and stable partners. We are keeping durable business relationship with more than 200 wholesalers in Japan, Korea, USA, UK, Germany, Canada, France, Italian, Poland, South Africa, Ghana, Nigeria etc.