Eco one is an &ldquoenvironmentallyfriendly package of the hybrid hotwaterheating system. this is for packing of a long and heavy product 60 kg, made of corrugated material. it is easy to recycle, without using the conventional wooden tray or urethane foam. this package replaced wooden blocks and foam polystyrene packages that were used for large, long, or heavy products with recyclable cardboards for all elements, which has contributed to achieving the environmentallyfriendly package style. furthermore, this package demonstrates the product protection quality at equivalent level to the wooden blocks in addition to the reduced packaging material types and higher packaging efficiency. these improvements have enabled to keep products lay horizontally during shortdistance transportation. this package has simple structure, easy to pack or unpack, yet protects product well. it is usable for both 50 litre and 100 litre hot water systems, and has achieved 20 cost reduction compared with our conventional package.