There are many different ways to tell if a hvac chapel hill nc company is reputable or not. One thing you can look at is the company website. A good company should have a well organized website with a lot of relevant and accurate information. They should have a list of their services as well as contact information. The website should also list any certifications that the company has. One other important area of the company's website should be, customer testimonials, this area will give you a good insight of what some of their customers are saying about them. This information will help you to decide if a company can be reliable when it comes to HVAC services.