Bees coming in air return vent and heat/air vents, Why? How?

Question

I posted before that I thought the bees were coming in thru the vents. Now I'm sure. How are they getting in the duct work and how do I get them out or stop anymore from coming in?

Answer 1

I think they built a hive somewhere along the duct work, most likely where it connects from the outside of your home. Probably best to call  in a professional.  You don't want to put insecticides in your vent system.