Environmental characteristics of habitable environments (e.g., hotel or motel rooms, spas, resorts, cruise boat cabins, offices, hospitals and/or homes, apartments or residences) are controlled to eliminate, reduce or ameliorate adverse or harmful aspects and introduce, increase or enhance beneficial aspects in order to improve a wellness or sense of wellbeing provided via the environments. Control of intensity and wavelength distribution of passive and active Illumination addresses various issues, symptoms or syndromes, for instance to maintain a circadian rhythm or cycle, adjust for jet lag or season affective disorder, etc. Air quality and attributes are controlled. Scent(s) may be dispersed. Hypoallergenic items (e.g., bedding, linens) may be used. Water quality is controlled. Noise is reduced and sounds (e.g., masking, music, natural) may be provided. Passive and active pathogen controls are employed. Controls are provided for the occupant and/or facility personnel, as is instruction, and surveys, including assessing wellness.

Environmental characteristics of habitable environments (e.g., hotel or motel rooms, spas, resorts, cruise boat cabins, offices, hospitals and/or homes, apartments or residences) are controlled to eliminate, reduce or ameliorate adverse or harmful aspects and introduce, increase or enhance beneficial aspects in order to improve a wellness or sense of wellbeing provided via the environments. Control of intensity and wavelength distribution of passive and active Illumination addresses various issues, symptoms or syndromes, for instance to maintain a circadian rhythm or cycle, adjust for jet lag or season affective disorder, etc. Air quality and attributes are controlled. Scent(s) may be dispersed. Hypoallergenic items (e.g., bedding, linens) may be used. Water quality is controlled. Noise is reduced and sounds (e.g., masking, music, natural) may be provided. Passive and active pathogen controls are employed. Controls are provided for the occupant and/or facility personnel, as is instruction, and surveys, including assessing wellness.

Provided is an air conditioner 100 used in a space R containing a gas having a concentration of carbon dioxide of 5000 ppm or less, the air conditioner 100 including a flow path 10 connected to the space R, in which a removal section 10c for removing carbon dioxide contained in the gas is disposed in the flow path 10, an adsorbent 80 containing cerium oxide is disposed in the removal section 10c, and the carbon dioxide adsorbs on the adsorbent 80 as the adsorbent 80 comes into contact with the gas.

Provided is an air conditioner 100 used in a space R containing a gas having a concentration of carbon dioxide of 5000 ppm or less, the air conditioner 100 including a flow path 10 connected to the space R, in which a removal section 10c for removing carbon dioxide contained in the gas is disposed in the flow path 10, an adsorbent 80 containing cerium oxide is disposed in the removal section 10c, and the carbon dioxide adsorbs on the adsorbent 80 as the adsorbent 80 comes into contact with the gas.

An air handling system comprising: a top cover (1), a base (5) and at least one air handling device provided between the top cover (1) and the base (5), wherein the top cover (1) and the adjacent air handling device, the base (5) and the adjacent air handling device, and the adjacent air handling devices are all connected to each other by means of magnetic attraction.

An air handling system comprising: a top cover (1), a base (5) and at least one air handling device provided between the top cover (1) and the base (5), wherein the top cover (1) and the adjacent air handling device, the base (5) and the adjacent air handling device, and the adjacent air handling devices are all connected to each other by means of magnetic attraction.

Provided is an adsorbent used for removing carbon dioxide from a gas containing carbon dioxide, the adsorbent containing cerium oxide and has a pore diameter having a differential pore volume of 0.0085 cm.sup.3/g- or more in a region where a pore diameter is 7 or less in pore distribution measured by Horvath-Kawazoe method.

Provided is a method for producing an adsorbent used for removing carbon dioxide from a gas containing carbon dioxide, the method including a firing step of firing a raw material containing at least one kind of cerium salt selected from the group consisting of a carbonate of cerium and a hydrogencarbonate of cerium.

Environmental characteristics or scenes of habitable environments (e.g., hotel or motel rooms, spas, resorts, cruise boat cabins, offices, hospitals and/or homes, apartments or residences, or other spaces or sub-spaces) are controlled to facilitate certain activities of a user in the environment by increasing focus, preparing for sleep, directing movement, masking ambient noise, and improving air quality, among others. Controllable characteristics include, for example, lighting, CO.sub.2/O.sub.2 levels, humidity levels, sound, aroma, and air temperature. Controls are provided for the occupant and/or facility personnel to select activities or scenes, or sensors detect the activity and implement an appropriate scene.

Provided is a method for producing an adsorbent used for removing carbon dioxide from a gas containing carbon dioxide, the method including a reaction step of reacting a mixture containing tetravalent cerium and at least one kind selected from the group consisting of urea, a urea derivative and an amide compound.