why not try these out the Adhere: A mirror on a adhere, also known as an inspection mirror, enables you to see around corners or into limited spaces within the ductwork. This tool is beneficial for examining challenging-to-access spots and identifying leaks in concealed sections.Common signs of HVAC duct leaks involve uneven heating or cooling in different rooms, amplified energy bills, excessive dust throughout the vents, and whistling or hissing Appears coming within read the ducts.Utilize a Smoke Pencil or Incense Stick: If you suspect a leak but can’t visually establish it, make use of a smoke pencil or incense adhere around suspected places.