During the last Heating, Ventilation, and A/C component maintenance my friend and I had at our home, the Heating, Ventilation, and A/C specialist told us that we would have to replace the entire air duct since it was expansively harmd and taping it wouldn’t be enough, and i asked for the cost of replacement as gave by the Heating, Ventilation, and A/C supplier and it was $3000 which I felt was too high-priced to spend, and my pal and I could do it ourselves and save it since it wasn’t a tricky Ac maintenance practice, or so my friend and I thought. I don’t know where everything started to fall apart, or what my friend and I did wrong however the current air duct we would bought got harmd as my friend and I tried to fix it up. My pal and I called the Heating, Ventilation, and A/C professional from the local Heating, Ventilation, and A/C component company through their home services to come check out if they could fix it and recover the air conditioner duct but he unfortunately told us we would broken too much of it. My pal and I had bought it online so my friend and I blamed it on quality and not our questionable air conditioner knowledge. My pal and I should have just paid for Heating, Ventilation, and A/C maintenance because now we would have to pay for what my friend and I were avoiding plus the cost of purchasing more ducts for our central Heating, Ventilation, and A/C because my friend and I still needed help with indoor comfort, but taping the harmd ducts would not labor too and there was a high risk that it would interfere with air quality and possibly increase our utility bills. My pal and I learned the lesson that ducts are not similar to changing the Ac filter which we have done for years and I don’t think I willbe attempting such a project any time soon. In my opinion, changing ducts should be left to the experts, forget the several tutorials on how to DIY.