These are all signs that you need your ductwork cleaned. 
Are you sneezing?
Are you congested all the time?
Are you dusting all the time?
Do you have allergies?
We are charging a flat price for the whole house Duct Cleaning 
IF ANYONE INTERESTED 
Our service package includes the following:
.Unlimited Vents Cleaning.
·Before and after pictures. 
·Ac unit checkup.
You must consider duct cleaning if you have
·Residents with allergies and asthma
·Smoker in the household
·Hair and dander from pet
·Done duct cleaning more than a year ago
NOTE (1): Do not worry about moving your furniture as we are using the latest modified equipment like whip snap which can go inside each and every vent quickly.
NOTE (2): No kind of upfront charges before the service all you have to pay after you are fully satisfied and happy.
NOTE (3): It's a Messy Process But we use Bags So all the dust will go into the bags located in the Vehicle.
Thanks.