All of our accordion shutters are either High-Velocity Hurricane Zone Approved or Miami-Dade Approved. Both HVHZ and Miami-Dade County have some of the strictest requirements in the United States and all products that carry these approvals will protect your home and family. The main reason we manufacture three different accordion shutters is because certain distributors offer different discounts throughout the year. We also get unique discounts due to our 30 year track record, and due to the volume of accordion shutters that we manufacture every year. Another main reason we manufacture 3 different accordion shutters is due to special attachments or unusual openings. One design may support a unique attachment which your home may require depending on how it is built. Other designs may not be able to support a particular opening in your home. Manufacturing three different designs allows us to provide more Floridians with quality, affordable hurricane protection than nearly anyone else in the industry.