Bats in my attic and air duct

Yesterday I was startled awake by a weird noise in my Heating, Ventilation, and A/C vent and it took me many minutes to figure out what I was hearing.

Initially, I thought that maybe an seasoned sock or something had gotten into the vent and was flapping around. Then, after a bit, I realize that the sound must be some kind of an critter, perhaps a parakeet, that had gotten stuck into the air duct, however but then I heard a squeaking sound, almost like a mouse makes, and then I realized it must be a bat that was in my Heating, Ventilation, and A/C vent system. I did not sleep anymore that night. After a while, the fluttering calm down but it did not go away entirely. I called up critter control but they requested I call a pest repair instead. The pest repair came out and they set up traps to get the bats out of my attic and relocate them. Evidently, my attic was infested with bats. They also took apart my entire ventilation system and it removed some of the bats, finally, the bats were all gone and I had to hire an Heating, Ventilation, and A/C corporation to come and repair the vents that the bats head been in. I also wanted a thorough air duct cleaning as I was anxious that I had been breathing all of that bat guano for months on end. I also hired a professional cleaner to clean up my attic. It cost me a lot of cash for everything to be cleaned and the bets to be rehomed like they were but now my attic is sealed off and it shouldn’t happen ever again. What a nightmare this was.
heating and cooling