"It's a Great Day at Haley Mechanical!" Haley Mechanical, part of the Frontier Service Partners family of brands, is the No. 1 HVAC contractor operating in Ann Arbor, Michigan and surrounding areas. Since 1998, we have been proud to serve our local communities, providing an award-winning service that puts an emphasis on quality, transparency, and communication. To us, providing dependable service is not just an empty slogan; it is how we operate every day. We understand that finding a good mechanical contractor is tough enough while finding quality service can seem almost impossible...especially in an emergency. At Haley Mechanical we under-stand that problems happen when you least expect, that is why we have service technicians standing by 24-hours a day to handle all your needs. At Haley Mechanical we service thousands of customers each year in southeast Michigan. You can depend on us for all your home heating, cooling, and plumbing needs. With a staff of trained professionals, we have the knowledge, experience, and commitment to ensure your satisfaction.