Whether you need AC replacement, maintenance, or more, you can trust World's Greatest Heating and Air to do the job right. Summers in Florida are hot and humid, so a reliable air conditioner is a necessity. When your AC freezes over, short-cycles, or struggles to keep up with your comfort needs, World's Greatest Heating and Air will be ready to help. Our air conditioning services include: 24-hour emergency service Air conditioning installation & replacement Air conditioning repair Air conditioning maintenance Air conditioning filters Ductless air conditioning We’ll ensure your air conditioner is ready to beat the heat. Contact World's Greatest Heating and Air for fast, dependable AC services in St John's County, Duval County, Clay County, and surrounding areas.