Ductwork sealing never seems necessary

Probably the least fun thing in the entire world is air duct sealing; I don’t enjoy paying for a medical professional appointment or a car oil change, but at least with those things, I can see or suppose the difference, then ductwork sealing is always something that I don’t notice! Maybe our Heating, Ventilation as well as A/C professional is pulling one over on me! Everytime I get our Heating, Ventilation as well as A/C tune up, the Heating, Ventilation as well as A/C professional looks over the air ducts, she then tells myself and others that I am losing energy since I have a tear in the seam or a hole in the duct.

I never notice any tear or hole.

I never notice any difference in our bill. I just tell the Heating, Ventilation as well as A/C professional to do the air duct sealing and I pay the bill; The cost of air duct sealing is not too bad, but watching the process hurts our heart though, however seeing what I am paying for makes it not worth it. The girl takes a thing that looks enjoy a bicycle pump and shoots air into the air duct. The air is supposed to have sealant particles that go in the air ducts and mold into them. Apparently those particles can then solve the hole and energy loss problem. I guess it is possible the girl charges myself and others a few bucks to shoot air in our air vent. I periodically guess there is no leak in the air duct at all, then but, I am not legitimately willing to take a gamble on this. If there is absolutely a leak, this could legitimately be bad for our Heating, Ventilation as well as A/C equipment. So I will always pay for the stupid repair.
a/c set up