Your questions answered: HVAC FAQs. B & B Heating & Cooling in Florissant 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 in this list or want more information on a particular topic, give us a call at 314-838-9800. Our experts can provide the information you’re looking for in a jiffy.