Answers: before our cooperation, we have the professional technical team to help you make the technical solution according to your working condition. To make sure the centrifugal fan efficiency operation. And also welcome to visit SIMO BLOWER to see the products production process and quality monitoring system. After sales service, we will offer 12 months’ repairing service, and provide lifelong follow-up services. Besides, our engineers are available for going abroad to offer the repairing service.