###### Abstract  
IAQ monitoring studies have gained renewed interest post COVID-19. Furthermore, accessibility to the corresponding enabling technologies has improved considerably in terms of cost and requisite knowledge. This paper aims to outline the key decisions involved for researchers and building managers alike to seek to implement their own environmental monitoring study using commercially available hardware and software. To do so, this paper first outlines the essential elements or building blocks of an IoT architecture, detailing the design criteria for selecting various hardware and software. Secondly, it outlines the process of integrating these different components and the flow of data from IoT device to databases and end-user applications. To demonstrate this process, an IAQ monitoring study was conducted at an open-plan office. Our results demonstrated the framework can be adapted to different worksites with minor modifications and provide the flexibility to interchange components. The data collected can be easily integrated into open-source analytic software for visualization and to make informed decisions to manage IAQ. It is through this process that we provide recommendations on how other users may adopt similar frameworks. IoT; IAQ; commercially available off-the-shelf (COTS) sensors; framework +
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VOCs are carbon-based gaseous emissions of varying chemical pollutants generated from certain activities such as the application of paints, aerosol sprays, and pesticides [8]. The source of these pollutants can range from indoor activities such as cooking, infiltration from outdoors, to emissions from building materials [9]. As the term VOCs generally describes a mixture of carbon compounds, they are common and practical to measure Total Volatile Organic Compounds (TVOCs) rather than measuring specific compounds. Currently, there are no regulatory guidelines for an acceptable level of TVOCs in non-industrial settings [8; 10]. However, TVOCs can result in many adverse health effects ranging from eye, nose, and throat irritation to organ damage in the liver, kidney, and central nervous system [8; 11]. Furthermore, TVOCs are considered to be a major contributor to _sick building syndrome_[12]. CO\({}_{2}\) is a colorless and odorless gas, primarily emitted through human activities such as transportation [13], and indoors that are mainly via occupant respirations [12]. A high level of CO\({}_{2}\) has also been associated with _sick building syndrome_ and _building-related illnesses_[14]. Nitrogen dioxide (NO\({}_{2}\)) is a highly reactive gas that is primarily generated through the burning of combustion sources, such as the burning of fuel [15]. It is known to cause respiratory symptoms and airway inflammation such that groups such as asthmatics, children, and the elderly are at higher risk [12]. Sulfur dioxide (SO\({}_{2}\)), similar to NO\({}_{2}\), is primarily generated through combustion processes of fossil fuels [16]. Exposure to SO\({}_{2}\) can lead to respiratory symptoms, particularly in vulnerable groups such as asthmatics and children [12]. In addition to the many IAQ parameters mentioned above, there are other common IAQ parameters that have been researched, but are beyond the scope of this paper, such as nitrogen oxide (NO), carbon monoxide (CO), and so forth. A short list of some recent IAQ studies with their relevant objective and main results have been summarized in Table 1.