Hangzhou Chongtian Fire Safety Technology (杭州冲天消防安全技术有限公司) has worked in the fire industry for more than twenty years. It provides fire-system maintenance and testing, fire safety assessment, fire design, approval filings, retrofits and installation. It supplies and installs certified automatic suppression systems, including heptafluoropropane, perfluorohexanone, IG-541, high-pressure CO2, aerosol, fire-detection tube, ultrafine dry-powder and high-pressure water mist systems. It uses more than 100 testing instruments and has served clients such as hotels, banks, railway offices and university libraries. It is registered with the Zhejiang Fire and Rescue Corps as a fire technical service institution for fire-system inspection and maintenance and for fire safety assessment.