Five Star Furnace, McMurray

For more than 20 years, the techs at Five Star Furnace—a family-owned-and-operated enterprise—have been minimizing fire hazards, ousting excess dust, and even helping to alleviate physical symptoms such as watery eyes and sore throats by cleaning out air vents. They use a negative-air-pressure method, which involves sending a powerful vacuum unit into main trunk lines, and use poles, brushes, pressurized air, and rubber whip heads to handle individual vents. All of Five Star's HVAC methods and equipment are National Air Duct Cleaning Association–certified.