Run! Don't use them! They try to scare you into buying a new system (heat/AC). They went in my crawl space and told me I was leaking carbon monoxide and needed to replace my system. They also said the flue pipe was disconnected and could not be reattached, so I needed a new system do to these problems.
I called THREE other Heating/AC companies and NOT ONE of them concurred with the carbon monoxide leak! The first one actually reattached the flue pipe for no charge!
All three other HVAC companies said my system was old and could be upgraded for efficiency if I would like. NOT ONE said I needed to replace the system for safety reasons!
RUN! DO NOT TRUST THEM!
I tried to complain to their management and they just backed their service guy.
Very shady in my book.
I highly recommend Pro Solutions Air! http://prosolutionsair.com They gave me an extremely competitive price with duct cleaning (the following week after installation) and dryer vent cleaning. Pro Solutions Air is very competitive, friendly and now my whole house is feeling a whole lot better.