David is well known in the RTP area as a knowledgeable, honest man with integrity. You won't find anyone better to diagnose the problem, or problems you are having with your HVAC Equipment! He will give you all the necessary information so you can make an informed decision. This includes the cost for Service, Repair or Replacement of your equipment. If you have additional questions, he will be happy to answer them. (919) 369-4593 Cell.