> Soleus Air Conditioners Draws in Fresh Air from Outside Today's homes are built tighter for energy efficiency, but trap in millions of irritating microscopic particles as a result. A Soleus LX air conditioner provides a true air filtration system by drawing in fresh air through the intake duct and eliminating stale air through a separate exhaust duct. The fresh air is also drawn through a washable air filter to remove impurities and create even cleaner air.