I had an Ad from Clipper Magazine for $49.95 unlimited returns and vents for a company called Ventilation Purification, 877-344-0498. The bill was over $400, additional mains, furnace motor cleaning and inspection and AC coils (?). A bit misleading on Advertisement. They not only left my house dirty and dusty, but damaged 8 return vents. I called them and they sent out 2 other service people, and they tried to fix the vents. However, the vents are still not fixed to the prior condition in which they were before they were here. I was told by... read full review »