Armstrong is a family owned and operated air duct cleaning and chimney service business. With over 45 years in business, we are one of the oldest, largest, and most experienced air duct cleaning and chimney service companies in the United States. Our customers range from residential, to institutional. We service many large property management firms, housing authorities and cleaning contractors. Our clients include some of the finest and well-known companies and buildings in Northern New England such as Dartmouth College, Phillips Exeter Academy, University of New Hampshire, Harvard Historical Society, U.S. Coast Guard, FedEx, Target, and Walgreens. This level of achievement only comes with years of hard work and an ongoing commitment to create and adopt industry innovations and standards. We provide the following services: Air Duct Cleaning Chimney Sweeping Dryer Vent Cleaning Exhaust Vent Cleaning Trash Chute Cleaning