9 Air quality measurement apparatus, namely, an indoor air sampling system consisting of electronic-based instruments for measuring environmental parameters that utilize multi-point air sampling to measure and monitor air quality metrics for multiple rooms within a building; downloadable computer application software for mobile phones, namely, software for monitoring and measuring indoor air quality metrics; computer hardware and recorded software for displaying, transmitting, recording, and analyzing indoor air quality metrics; electronic sensors for measuring carbon dioxide, carbon monoxide, total volatile organic compounds, temperature, pressure, relative humidity, particulate matter, ammonia, and formaldehyde with embedded software for monitoring and evaluating carbon dioxide, carbon monoxide, total volatile organic compounds, temperature, pressure, relative humidity, particulate matter, ammonia, and formaldehyde data, all for environmental use; Air quality measurement apparatus and electronic sensors for measuring and monitoring carbon dioxide levels, carbon monoxide levels, total volatile organic compounds, temperature, pressure, relative humidity levels, particulate matter levels, ammonia levels, and formaldehyde levels of multiple rooms within a building