^ ^ "In the two hose design the exchanged air doesn't come from the interior in the place or dwelling, but enters from the next hose". Experts123.com. Retrieved 10 June 2015. Adding Value: In many houses it is much less expensive to setup ducted air conditioning than to install wall https://docs.google.com/spreadsheets/d/14Zqd0FEGkdjJlcohp4SFWeSZ9M4AIBFQpIDlHrjqztI