I had my ducts cleaned today using a groupon I purchased. The service isn’t what I expected— I thought duct cleaning involved some type of sophisticated negative pressure cleaning, but instead it was a small shopvac looking device with a long hose with a brush on the end. What they considered the main line isn’t what I considered the main and therefore did not clean majority of the duct run.
The company also tried to upsell me on sanitizing cleaning for $99 and the UV Light air cleaning for $799. I declined both. I chaulk it up to as you get what you pay for. I swore off groupons long ago and this was an old one ready to expire.