How do you insulate duct work?

To insulate ductwork, first, clean the surface of the ducts to ensure proper adhesion. Use fiberglass insulation or foam duct wrap, wrapping it around the ducts and securing it with Duct Tape or insulation tape. Make sure to cover all joints and seams to prevent air leaks. Additionally, consider using a reflective insulation material for ducts located in unconditioned spaces to improve energy efficiency.