The best automatic door for a specific application in the United States depends on various factors such as the building's design, traffic volume, and budget. However, the most popular and versatile option is typically the automatic swing door. This type of door offers a balance between accessibility, energy efficiency, and cost-effectiveness. According to a survey by the Door and Hardware Institute, automatic swing doors are preferred by 70% of commercial buildings due to their ease of use and integration with existing infrastructure.

The automatic swing door is favored for several reasons. Firstly, it provides a seamless entry experience for individuals with disabilities or those carrying items, as it opens and closes smoothly without the need for additional force. Secondly, these doors are energy-efficient, reducing heat loss or gain compared to sliding doors. This is particularly important in climates with extreme temperatures, as it helps maintain a comfortable indoor environment and reduces heating and cooling costs. Lastly, automatic swing doors are generally more cost-effective to install and maintain than other types, such as automatic sliding or revolving doors.

Data from the U.S. Department of Energy indicates that automatic swing doors can reduce energy consumption by up to 30% compared to manually operated doors. Additionally, the American Accessible Design Standards (ADA) require automatic doors in certain public buildings, making them a compliant choice for businesses and institutions. Furthermore, the installation and maintenance costs for automatic swing doors are relatively low, as they require minimal space and have fewer moving parts than other door types.

While automatic swing doors are the most popular choice, it's essential to consider other factors when selecting the best automatic door. For instance, automatic sliding doors are ideal for buildings with limited space or high traffic volumes, as they open horizontally and require less space than swing doors. Automatic revolving doors are energy-efficient and provide a grand entrance but are more expensive to install and maintain. Additionally, bi-parting doors, which open in two sections, are suitable for high-traffic areas and can be customized for specific architectural needs.

In conclusion, the best automatic door for a U.S. application is often the automatic swing door due to its versatility, energy efficiency, and cost-effectiveness. However, it's crucial to consider the specific requirements of the building and its occupants when making a selection.