My room air is stale but analyze: should I improve ventilation? Map the air quality: CO2 buildup, stuffiness, allergens. Calculate: if I improved air circulation (fan, cracked window, purifier), would sleep quality improve? Show me the ventilation strategy: these methods for air quality. Give me the implementation: this setup for my room. Include: whether poor air quality is affecting sleep, signs of inadequate ventilation, and how to improve without temperature issues.