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Diversified Mechanical Services has served our customers and community for more than 30 years. Started by Carl Hendrickson in 1980, we have grown into serving the entire Lower Columbia area. We are your American Standard Comfort Specialists. It is customer comfort and satisfaction that keeps Diversified Mechanical Services striving for superior quality and service. Our NATE certification guarantees we meet the highest performance standards in the industry and provide our customers with an optimally healthy indoor environment.