Your questions answered: HVAC FAQs. Daniel's Heating & Refrigeration Corp. in Midlothian can answer all your HVAC-related questions. Before you get on the phone, browse these to see if we already responded to your question online. If you don’t see your question on the list or want more information on a subject, give us a call at 804-372-0313. Our staff can give you the information you’re looking for in an instant.