ok its just a flat rate $99 and the package includes.

1) All the Ducts cleaning 

2) All the Vents cleaning 

3) Natural disinfectant sanitizer will be sprayed into the main line of your duct system during the cleaning. Sanitizer can be used around children, pets and food.

4) Free Inspection/check up of your Furnace, Ac and dryer vent will be provided