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, Ford F-Series places the top list with 49,618 cars soldout in a single month. Ford F-Series is as well as Chevy Silverado and Chevy Cruze which respectively hit the figure of 32,579 and 23,737. Let's see top ten best-selling cars in America in June 2011. A tighter built home means less outside air infiltrating in the home, which means less oxygen to use for combustion within the furnace. As the furnace burns fuel and oxygen for combustion, it "eats up" surrounding air, which has to be "made up" with fresh air. If air cannot type in the home as easily anymore, this can cause serious issues. As the surrounding air is utilized for combustion, rather than substituted with oxygen, a negative pressure inside the space can happen. This could create combustion problems for the furnace, plus burn up fresh air for anybody inside the home. Most people have either watched or been aware of the movie Wall-e. It was a a cute film, set way into the future, concerning the adventures of the little robot that has been left behind in the world to up the mess put aside by humans. The humans are living in space when they wait for the earth being re-habitable to allow them to all return. Wall-e meets another robot called EVE, who may have been shipped to earth to hunt out any indications of new life (growing plants), falls in love and follows her into space where they're involved with a lot of antics before Wall-e eventually returns to earth with EVE, the humans follow and they also set about so that it is a great location to live again. 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 This problem makes your hvac equipment work like inefficient outdated models which can waste plenty of your money.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.