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References: Environmental Control and CO₂ Management

  1. Vapor pressure deficit - Wikipedia - Defines VPD as the difference between actual and saturation vapor pressure; explains how VPD drives stomatal regulation, transpiration rate, and nutrient uptake in controlled-environment crops.

  2. Carbon dioxide in Earth's atmosphere - Wikipedia - Context on atmospheric CO₂ concentrations and the science behind CO₂ enrichment in greenhouses, where elevating CO₂ from 400 ppm to 1,000–1,500 ppm can increase photosynthesis by 20–30%.

  3. HVAC - Wikipedia - Overview of heating, ventilation, and air conditioning system components and design principles applicable to grow room environmental control, including air exchange rates, duct sizing, and temperature zoning.

  4. Greenhouse Technology and Management - Nicolas Castilla - CABI - Detailed treatment of greenhouse climate control including temperature setpoints by crop stage, humidity management, CO₂ enrichment economics, and integrated HVAC system design for commercial operations.

  5. Hydroponic Food Production (7th ed.) - Howard M. Resh - CRC Press - Environmental control chapter covers air and solution temperature ranges by crop type, VPD target tables, CO₂ enrichment systems, and the interaction between lighting heat load and HVAC sizing.

  6. USDA: Greenhouse Climate Control - USDA National Agricultural Library - Curated research bibliography on greenhouse temperature, humidity, CO₂, and airflow management, with links to peer-reviewed publications on climate optimization for controlled-environment crops.

  7. EPA: Indoor Air Quality - EPA - Guidelines on indoor CO₂ levels, ventilation requirements, and fire safety relevant to operating CO₂ enrichment systems in enclosed grow rooms with electrical equipment.

  8. Khan Academy: Gas Laws - Khan Academy - Covers ideal gas law, partial pressures, and humidity physics foundational to understanding VPD calculations, CO₂ distribution in enclosed spaces, and dehumidifier sizing.

  9. MIT OCW: Heat Transfer - MIT OpenCourseWare - Engineering heat and mass transfer course covering convection, conduction, and evaporation — essential for calculating grow room heat loads from lighting and sizing HVAC systems.

  10. Real Python: Data Logging with Python - Real Python - Tutorial on Python logging module applicable to building environmental data loggers that record temperature, humidity, CO₂, and VPD over full crop cycles for analysis and alarm management.