A termostát is a device used to regulate the temperature in a space, such as a home or office. It works by sensing the current temperature and comparing it to a set desired temperature. When the temperature deviates from the set point, the termostát activates heating or cooling systems to maintain a comfortable environment. There are different types of termostáty, including manual and programmable models. Manual termostáty require users to adjust the temperature settings manually, while programmable ones can be set to change temperatures at specific times, improving energy efficiency and comfort.