Serving the Harbor Springs, Charlevoix and Petoskey region of Northern Michigan For nearly fifty years, MacGregor is the area’s premier provider of plumbing, heating, air conditioning and drain cleaning services. Now, MacGregor is proud to be considered the leader in electrical, duct cleaning, geothermal and indoor air quality services for your home.Explore our website, find a new product for your home, get some ideas for a room makeover or schedule that all-important service or tune up for your home comfort system.