^ ^ "In The 2 hose design the exchanged air won't originate from the interior on the place or residence, but enters in the second hose". Experts123.com. Retrieved 10 June 2015. Central ducted A/C presents temperature Handle and ventilation to an area by conditioning air inside of an air handler https://docs.google.com/spreadsheets/d/1sFkX-195bzbspltn6kI7pJAwHC_IWJIWy0giWMghe84