I have a house that was built in 1977 in houston which I bought last year. The AC system up until the boots/Register/vents were installed in 2007 or 08. and the Air Duct boot/Register/Vent ( I am not sure exactly what they're called) has insulation on the inside that has overspray from when they...

where do I get air duct cleaning equipment in good prices, I need brushes, vacuum, etc. Anyone has any good places to get it? Thanks