ENGS 89/90 Reports

Degree Program


Year of Graduation


Project Advisor

William Scheideler


Solomon Diamond

Document Type


Publication Date



People spend a vast majority of their time indoors, and indoor air quality (IAQ) has tremendous impacts on people's health and wellbeing. It is important to monitor IAQ in the airtight buildings we live and work in to ensure there is proper ventilation. IAQ poses a great risk to public health as it is linked to health conditions including but not limited to asthma, lung cancer and heart disease. The primary sources of indoor air pollution include mold, smoke, chemicals in household products, and dust, and the top solution to IAQ issues lies in increasing and improving ventilation. To address the issue, our team developed an IAQ monitor that measures the concentration of crucial indoor air pollutants, namely CO2 and particulate matter, including PM1, PM2.5, and PM10, as well as temperature and humidity. To make this product accessible to homeowners of most socioeconomic backgrounds, we iterated through three prototypes, optimizing the product’s bill of materials to keep cost and MSRP low. The sensors on the IAQ were tested to verify that highly accurate sensors were used. Depending on a user’s preference, the monitor can be mounted on a wall or used with a compatible stand on a tabletop. The monitor displays indoor air quality status simply through RGB LEDs and connects via Bluetooth to an Android application that was developed for this project. The smartphone application includes information about IAQ and a history page.

Level of Access

Restricted: Campus/Dartmouth Community Only Access

Available for download on Monday, March 24, 2025


Available to Dartmouth community via local IP address.