All MENTEK test chamber and oven are designed and manufactured according to all relevant European-Union [EU] standards,codes and regulations for electrical, environmental and user safety for such industrial equipment and thermal process. All material and equipment’s are from well-known EU brands and comply with all EU standardization systems [ISO, CE, DIN] and are fully safe for user in laboratory or industrial manufacturing plant.Mentek guarantees that all the environmental chambers provided are brand new and unused,and the warranty period is 12 months (or more longer as talked with customers in advance) and the warranty period for the contracted goods is calculated after the customer receives the goods.