Your questions answered: HVAC FAQs. Tri City Fuel & Heating Co., Inc. in West Columbia can answer all your HVAC-related questions. Before you get on the phone, check to see if we already responded to your question online. If you don’t see your question listed or want more information on a particular topic, give us a call at 803-796-9172. Our experts can provide the information you’re looking for in a jiffy.