Exterior doors are made for efficiency, security, and beauty. Prioritize your needs and budget before you sort through the options available.
Protecting the home's openings from winds and wind blown objects is the single most important step a homeowner can take in protecting the structure from serious damage. If you can keep the wind outside, you and your possessions will be safe inside.
Many houses are equipped with double entry doors. These doors are convenient, but because they span a wider opening than a single door, they are usually not as strong as a single door and are therefore more susceptible to wind damage.
Exterior doors are necessary for physical access into and out of a building, and may provide ventilation and illumination too. They may, however, contribute to high amounts of undesirable air leakage and related energy losses.