The process of selecting, installing, and operating a smart thermostat system is a meticulous one. It requires a deep understanding of not only the technical aspects but also the economic, environmental, and psychological implications.

The first point of consideration revolves around picking the right smart thermostat system. There is a smorgasbord of options, each with its own strengths and weaknesses. Some of the popular brands include Nest, Ecobee, and Honeywell. These systems differentiate themselves with unique features such as learning algorithms, remote sensors, and integration with home automation systems. Therefore, it is imperative to understand your specific needs, budget, and the compatibility of the devices with your home infrastructure. A Nest thermostat, for instance, uses machine learning to adjust temperature settings based on your habits while an Ecobee uses remote sensors to monitor temperatures in different rooms. The choice, hence, is intimately tied with the specific use-case scenario.

Second, the installation process requires a certain level of technical acumen. While smart thermostat systems come with installation guides, it is crucial to understand the basic principles of thermodynamics and electrical systems. For instance, you must know how to safely disconnect your old thermostat to avoid damaging the HVAC system or causing a short circuit. Moreover, some systems like Honeywell require a C-Wire (common wire) for power. If your home doesn't have one, you may need to hire a professional or use an adapter, which adds to the complexity and cost of installation.

Third, the placement of the thermostat is critical. It should be installed away from direct sunlight, drafts, doorways, and windows. The optimal location is at a central point in your home, ideally where you spend the most time. This is because the thermostat uses the ambient temperature at its location to decide when to turn the heating or cooling system on or off.

Fourth, a smart thermostat is more than just a temperature control device. It is an investment with potential monetary returns. With energy prices perpetually on the rise, a smart thermostat can help reduce energy consumption by understanding your schedule and temperature preferences, thereby cutting back on waste. According to a study by Nest, users saved an average of 10-12% on heating and about 15% on cooling. Depending on your energy costs, the savings could pay back the initial investment in a few years.

Fifth, it is crucial to understand the value of data in this context. Smart thermostats collect a vast array of data such as the time you wake up, go to sleep, your preferred temperatures, and more. While this data is used to optimize temperature settings and save energy, questions of privacy and data security arise.

Sixth, the environmental implications of smart thermostats cannot be overstated. According to a study by the Environmental Defense Fund, if every household in the U.S used an energy-efficient thermostat, it could mitigate around 56 million metric tons of carbon pollution annually. This impact is equivalent to taking about 12 million cars off the road.

Seventh, smart thermostats often form part of larger home automation ecosystems. For instance, the Google Nest integrates with other Google devices to provide a seamless smart home experience. Therefore, it's crucial to understand how these ecosystems work and what additional costs and benefits come with being part of such an ecosystem.

Lastly, it is essential to consider the customer support provided by the thermostat company. Some companies offer 24/7 support, while others are available only during business hours. Moreover, some companies offer a warranty on their products, which is a significant advantage if your device malfunctions.

In conclusion, the process of hiring a smart thermostat installer is a complex one. It requires a deep understanding of the technical, economic, and environmental aspects. It also requires a willingness to part with certain personal data for the sake of convenience and efficiency. However, through careful consideration and meticulous planning, a smart thermostat can be a worthy investment for the modern, eco-conscious, and tech-savvy individual.