▎ 摘　　要

NOVELTY - The system has a contactless sensing units directed respectively to a user and configured to acquire a measurement signal indicative of a distance and distance change from a user over time. A carbon dioxide reducer (1010) is provided with a collecting and analyzing unit to receive the indicative signal separately for each user and determines parameters comprising user heartbeat rate and breathing rate or user movement and regulates supply of carbon dioxide-reduced air to proximity of a user through a respective outlet channel dedicated to the user. A removable storage unit contains and supplies alkali hydroxide and hydrogen peroxide to a reactor (1011), where the reducer is a mobile autonomous apparatus. The reducer is made of a solid sorbent material that is selected from an activated carbon, carbon fibers, graphene based adsorbing material, zeolites, molecular sieves, metal organic frameworks, highly porous polymers and amine-incorporated clay minerals and polymers. USE - System for increasing awareness of a computer user located within a closed space e.g. office buildings and workplaces, for regulating carbon dioxide concentration in air based on biological measured parameters. Uses included but are limited to flats, homes, hospitals, medical clinics and waiting rooms. ADVANTAGE - The system is configured for each computer user located within a closed space designed to reduce carbon dioxide within that user's breathed air surroundings, thus increasing user awareness and current cognitive capabilities. The operation of the carbon-dioxide-reducer is combined with other systems targeted to improve users' comfort and health. DESCRIPTION OF DRAWING(S) - The drawing shows a block diagram of a system for increasing awareness of a computer user located within a closed space. 1010Carbon dioxide reducer 1011Liquid-based reactor 1012Inlet 1013Distribution unit 1014Managing unit