Air-conditioning installations; Ceiling lights; Cleansing/sanitizing system comprising a containment enclosure specially adapted for containing an atomized cleansing/sanitizing spray mechanism for use in the cleansing/sanitizing of objects including articles of manufacture, natural products, foods and pharmaceuticals; Electric patio heaters; Geothermal-based HVAC units; Plumbing fittings, namely, drains; Purification installations for sewage; Showers; Taps; Toilet seats