Figure above: Air clean-up ventilation "ef" installed in a house
Health has always been one of a major considerations for us. Toxic substances such as formaldehyde, for example, which causes "Sick house syndrome" are eliminated from building materials these days.
People are becoming more concerned about healthy living these days. Not only from the physical point of view but also mental health is a concern for example, water quality, sleep quality, heat shock prevention and stress release, etc. Many people are more aware of daily health as lifestyle-related diseases such as metabolic syndrome became more common and need to be prevented.
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