A device for removing carbon dioxide from the air has a reaction chamber having closed sidewalls and a removable end wall. There is a removable adsorber unit disposed in the reaction chamber that comprises an adsorbent mixture containing soda lime mixed with activated charcoal, and an air-permeable outer covering surrounding the adsorbent mixture. A louvered bed is disposed above the adsorber unit in the reaction chamber. The louvered bed has openings between angled louvers for directing air above the louvered bed into the removable adsorber unit. Air flowing into the reaction chamber is directed toward the adsorber unit by the louvered bed, so that the air flows between the louvers, through the openings and into the adsorber unit where the carbon dioxide in the air is adsorbed and removed from the atmosphere.