But ultimately this drives me to do the best job possible and use the some of the best equipment availalbe . Now I've been doing it a few years and have had lots of positive feedback:

 

There are homes where I tell the customer you don't need this done; here's why.  If they tell me to do  it, they will win that discussion.

 

I have sucked mice out of duct work and have discovered runs that aren't attached. I've fixed furnaces for people and let them know of impending problems (we have a gas detection meter). I'm in there why not make sure its kosher. We clean parts of the furnace that prevents them from failing and having a callout to a plumber which would end up costing them half of what our entire cleaning service does anyway. 

 

I've been told by customers that before cleaning the ducts a layer of dust would cover the desks every morning or that black dirt would be throughout the house. After cleaning it was all good.  I've found a hole big enough for a cat to come in through the floor of a trailer.

 

After the ductwork is cleaned I don't tell them 6 months or a year. I tell them to change the filter regulary and you should be good for atleast 5 years maybe even more.

 

As with anything people will cheat you; but a good duct cleaner will definately benefit the customers who call.

 

In the end it's not just about Indoor Air Quality, its about keeping your house or office clean, knowing that there isn't anything rotting in your ductwork and inspecting the HVAC system inside out.

 

That happens alot on this forum..