Current ventilation standards are based on odor instead of health. One cannot smell healthy air. Ventilation standards disfavor air quality in smaller residences and multi-family dwellings while excessively ventilating larger homes. Ventilation impacts our health, cognition, sleep, and disease transmission. This session provides background on today's ventilation standards and recommendations for creating healthy indoor environments. The Covid Safe Space IAQ calculator for reducing SARS-CoV-2 transmission in buildings is introduced. Examples show reduction of infection probability and infection multiplication with increased fresh air, improved air filtration, face mask usage, and vaccination in different building venues (classrooms, restaurants, offices, gyms, homes).