There are many different ways to figure out which hvac company is the best company for you to give your business too, such as going onto better business bureaus to see who is listed on there, and who isn't. Even more you can also just go on almost any company's website and see their reviews customers have given them for their level of work. But sometimes there are companies that only post the good reviews customers have given them on their own personal websites because they want to look like the best/ compete with the best, so it's always better to go on many different sites that give reviews about heating and cooling companies, that way you will know for sure if they are good for you or not. Everybody is different and has their own idea of how they want their job done and who they want it done, then there is also those that don't care who does it as long as someone does an excellent job. some people like getting to know the business company better so they get a representative to come over and give them a quote because they prefer face to face interaction rather than communication through technology. Some people tend to get a better feel of who they are giving their business to when they meet in person and always get a quote about what you want done from several different companies and then choose the best one that fits you, don't go just based off of price only. Go off of their credentials and there interest in you as a customer to them.