Mitsubishi Split System Reviews in South Valley (Duct Size).

http://www.minisplitwarehouse.com/9000_Btu_19_SEER_220v_Inverter_Mini_Split_Heat_Pump_AC_Energy_Star/p315964_1592126.aspx Measure the size of each duct in an attic, as well as the length of each from the primary duct to the point where each duct transitio