Cozy Winter: Algorithm for Home and Office at the Intersection of Ergonomics, Psychology, and Biophysics The concept of "cozy" (Danish hygge, Norwegian kos, German Gemütlichkeit) during winter transforms from a subjective feeling into a practically measurable parameter of environmental quality that affects productivity, mental health, and physiological comfort. Its creation can be represented as a systematic algorithm based on the impact on the main channels of perception (thermal, visual, acoustic, tactile, olfactory) and considering the principles of psychophysics and ergonomics. Phase 1: Thermal Comfort and Air Dynamics (Basic Level) Cold is the main physical stressor of winter. Coziness starts with a correct temperature and humidity regime. Algorithm: Temperature: Maintain differentiated temperature. For living spaces: 20-22°C in areas of activity (living room, office), 18-20°C in the bedroom (promotes better sleep). For offices: 21-23°C, as recommended by GOST and ASHRAE. Humidity: Winter air dried by heating systems (relative humidity may fall below 20%) causes dryness of mucous membranes, reduces local immunity, and subjectively enhances the feeling of cold. Goal: 40-60%. Use humidifiers (ultrasonic, steam), hydrogel balls on radiators, indoor plants with high transpiration (spathiphyllum, cyperus). Air movement: Avoid drafts but ensure soft circulation to prevent stagnation. Use ceiling fans at low speed in reverse direction (for mixing warm air under the ceiling). Phase 2: Light Environment (Visual and Circadian Aspect) Deficiency of sunlight is a key factor in seasonal affective disorder (SAD). Cozy light ≠ darkness. Algorithm: Daylight: Maximize access. Pull back curtains, use light, reflective surfaces (walls, furniture). Place the work area perpendicular to the window. Artificial light: Create a multi-layered, warm, and non-uniform light picture. Base layer: Diffused general light (ceiling lights with a warm spectrum, 2700-3000K). Local accents: Warm di ... Read more