When I was talking to the Heating & A/C specialist about our current Heating & A/C system, a single question she asked was if I wanted the air vents up high or down low? I couldn’t believe she would ask such a question? I wasn’t the Heating & A/C specialist, & I thought they could make that decision without me, but she was serious. When she explained about the way heat & frosty reacted, I felt prefer I was back in school getting a math lesson. Her question about knowing what it would cost to have the air vents & returns in different spots threw me off guard. I was paying for this current Heating & A/C system. I wanted everything to be perfect, & I didn’t want a bevy of heat & frosty floating around our apartment where it couldn’t be used, because I was worried about a few hundred dollars. She apologized to me, but said it was a bit too late to add extra air vents without adding more HVAC duct. She told me that the small fans inside the HVAC duct would direct the cool air & heat to where it needed to go. When I changed from heating to cooling, the fans would change their direction & it would automatically send the air to the floor or the ceilings. I thanked him for her explanation & said I didn’t understand what the fans were for; After a lengthy discussion about the air vents & how the smart temperature control worked, I was satisfied with the labor they did. I only wished I had the current Heating & A/C system installed a couple of years earlier.