What licenses and certifications does your company hold?

I'm sorry, but the documents provided do not contain information about the specific licenses and certifications held by Del-Air Heating, Air Conditioning, Plumbing, and Electrical. For accurate details on their licenses and certifications, I recommend contacting them directly at (904) 310-7355 or visiting their website at Del-Air Heating and Air Conditioning. They would be more than happy to provide you with comprehensive information.