The importance of indoor air quality (IAQ) on human health gained increasing recognition without no doubt, especially given that modern lifestyles result in people spending nearly 90% of their time indoors (Klepeis et al., 2001). From homes to workplaces, the air we breathe, the temperature, and even the light and noise around us directly impact our health, productivity, and well-being.Although considerable extensive studies have investigated the given negative health effects of outdoor air pollution, insufficient indoor air quality could be “equally damaging, if not more, as humans spend nearly 90% of their time indoors” (Klepeis et al., 2001). Indoor air pollutants, such as radon, are known to cause considerable health hazards. A study conducted across 201 households in Dekalb County, GA, revealed that radon levels pass the EPA's moderate risk thresholds in 18% of the homes, with high-risk levels identified in 4% of the residences. This information further substantiates that “residential exposure to radon is strictly associated with lung cancer risk” (Cincinelli and Martellini).

Deeper research on the factors to consider when achieving a healthy indoor environment showed that it goes beyond air pollutants. In order for one to obtain a healthy indoor environment (HIE); thermal, visual, and acoustic comfort should also be accounted which mostly show effects to a physocological extend. According to Frontzcak, who reviewed 891 relevant titles, indoor comfort is also defined by thermal, visual and acoustic comfort while he defines each with varying parameters. “The standard defines the thermal environment (most important one) as a function of four physical variables (air temperature, mean radiant temperature, relative air velocity, and air humidity). Visual conditions are characterized by such parameters as luminance distribution, illuminance and its uniformity, glare, colour of light, colour rendering, flicker rate and amount of daylight. the quality of the sound environment is linked to numerous physical parameters…sound pressure level…and sound frequency” (Frontzcak). Each factor contributes uniquely to a comfortable and healthy indoor setting, yet, traditionally, indoor monitoring has focused on air quality alone.

Traditionally, monitoring the quality of indoor air depended on costly, complex, and fixed devices, resulting in obstacles to enhanced data gathering and accessibility. Nevertheless, the latest developments in sensor technology are currently oppening the way “lower-cost, easy-to-use, portable air pollution monitors (sensors) that provide high-time resolution data in near real-time,” making comprehensive IAQ monitoring increasingly feasible (ACS Publications). An example commercial device, IQAir's AirVisual Pro (IQAir), have responded to this need, utilizing “professional-grade pollutant sensors and air quality testers for PM2.5, carbon dioxide (CO2), smoke, dust, and other fine hazardous particles” to ensure accurate and consistent air quality readings. Still, these devices focus solely on pollutant levels, overlooking broader environmental aspects like temperature, humidity, and sound quality, which are equally impactful to well-being. Like this device, when a market research is conducted, it shows that big majority is focused only on air content, lacking measuring any other feature that may determine HIE's. 

Taking all these elements present so far into account, my project aims to create a Smart Environmental Monitoring (SEM) device. This device aims to fill a crucial void in indoor air quality monitoring by measuring various environmental parametersᅳsuch as temperature, humidity, light, noise, and targeted pollutants like CO2 and particulate matterᅳin real-time. This tool will provide comprehensive monitoring in both hygienic and ambiance(mood) features, improving indoor conditions for overall health and wellness. and it will also be beneficial for individuals with particular health issues, like asthma sufferers who might be affected by changes in air quality. A research done on "150 epilepsy patient shows that Inadequate sleep hygiene is independently related to low QoL but indirectly related to anxiety and depressive symptoms through sleep " (Sang-Ahm Lee) which shows how important HIE is just like with the depression patient where every little detail can lead them to non-estimable acts. Rather than measuring only hygiene with one or two sensors, This device aims to comment about the overall indoor environment by analyzing both hygiene and ambience through multiple sensors. SEM supports the objective of ensuring good health and well-being by enhancing indoor environments and increasing awareness of the environmental influences on daily living. 

Ultimately, the initiative delivers practical information in a visually appealing and user-friendly way, promoting proactive management of indoor health by enabling individuals to implement simple yet impactful adjustments to their environments. SEM has the potential to integrate with other intelligent systems, creating a network of technologies aimed at enhancing quality of life and mitigating indoor health issues.Aesthetically pleasing and intuitive actionable insights facilitate minor yet significant environmental changes for indoor well-being. The device has potential usage areas in households, office, factories with dirty manufacturing process, or in any building to conduct a real time inspection; also in advanced HVAC systems, physiology department and entertainment industry in order to obtain information about the mood of the indoor spaces. In addition, it may act as an encouraging device that shows how easy actually it is better you health and energy(mood) in just a few changes.