DND Heating & Air Conditioning has been in business over ten years. We are a family owned AC repair company in Richardson, TX. Customer service is top of our list and nothing counts to us more than our customers opinion. All estimates and repairs will come with a repair vs. replace bid so that you may have more options as a homeowner / business owner. With more choices you will know where you stand if you choose to repair the unit, or if you choose to replace it. We offer financing for your new air conditioning system to be instaled, call for details.