Inaba Denko is a brand of air conditioning installation accessories with over 70% of sales in Japan. It started as a pioneer in developing Pre-insulated Copper Tubes for Air Conditioning. The copper tubes for refrigerant and insulation are integrated into a single unit, greatly simplifying the installation process. Insulflex, a manufacturer that develops and produces air conditioning installation accessories and related components for water and hot water supply piping, is also known as Insulflex.