Recent Review: Let me preface that my home was built in 1998 and the builder used "duct board" for the heating and air-conditioning duct and returns, which unfortunately I had no knowledge of until this year. The main supply to the furnace was not sealed nor attached properly to the furnace wall. The original HVAC contractor also inappropriately installed a humidifier within the duct board main supply. The existing duct board became rancid with dirt on the inside due to improper installation. North Star technicians removed existing duct, replaced certain existing boots, used existing registers/grilles wherever possible. They removed humidifier and redesigned duct work layout and installed new supply and return duct using galvanized steel main supply trunk and foil-faced flex leads, sealed and with insulation to code. Included dampers for all supply leads. They also replaced my dryer vent with metal duct which has tremendously improved clothes drying time! I am extremely pleased North Star! Contract manager, Tom, visited on-site almost daily to oversee proper installation and to consult with the install supervisor (main technician, Al). The work ethic of the main technician Al is to be commended; he was a most methodical, knowledgeable, and steady worker who did not slack off whatsoever on the job. Sales Associate Shelly, also visited during the installation period to assure customer satisfaction. Although the house air flow has greatly improved, when outside temperatures above 80 degrees and humidity prevail outside, we still experience a feeling of 'too much wet cold air'. Please note however that our inside air handler and outside heat pump were installed by another local company in 2011. North Star did explain to us that the sizes of these units do not match, lending to improperly conditioned air, i.e., not removing enough moisture from the air. North Star did install two vents and a return to their original installation to help balance the inequity of these units. Shelly, our sales person, has stated she will discuss with Contract Manager Tom and see what can further be done to help.