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One of the most common problems with hvac equipment is poor ventilation. This problem makes your hvac equipment work like inefficient outdated models which can waste plenty of your money. The two most common reasons behind poor venting: inadequate duct sizing as well as a dirty return air filter. The Seoul Motor Show (SMS) could be the only international motor show held by Korea that promotes the evolution in the automotive industry heading toward an eco-friendly direction. This year's show has been held at Ilsan KINTEX from 1 to 10 April 2011. It is thought to be the largest show inside good reputation for SMS. Most of the cars with the future which can be being displayed on the show tend to be plus much more powerful and clean. The Seoul Motor Show 2011 is bringing consumers several types of eco-friendly vehicles and also sports cars. Here are some impressive future car designs with the show: