If you are building a condo, you should get a smart HVAC system. Smart HVAC units are great, however they just don’t have the stuff to really provide temperature control, but central HVAC units use air duct connected throughout the apartment to make the whole apartment a single amount. If you don’t want a room the right temperature, seal off the air vent and you are fine to heat or cool, and most older homes don’t have air duct in place. Installing air ducts is hard and not easy on the home. So, if you happen to be setting up your apartment from the bottom up, invest in some HVAC ducts. This will make sure there is no damage to your home. Also the air ducts are set up way nicer and sealed tight. It is harder to put the air duct in an aged wall. It is easy to be the ducts in a wrong pattern, loose and cracked. This allows the HVAC air to blow out of the condo and lead to much larger bills. Next the HVAC unit will do too much work for itself and breakdown. You want the air duct set in right. A new way to ensure the air duct is fine is to get a business that does sheet metal work with the installation of the air ducts. Some HVAC companies have a metal shop in their office. The HVAC contractors put the size amounts into a ipad for the amount of the air duct. The ipad then runs a program that cuts the metal real well.