1 From the distance from the center of the earth to the peak of the mountain.  As mountains are generally measured from sea level, Mount Everest 29,035 ft (8,850m) is considered to be king. However, there is a difference between the highest and tallest.
You can buy acoustic ceiling tiles in either 2'x2' or 2'x4' sizes. It will cost about $1,000-$1,700 to install an acoustic ceiling system in an average 12'x14' room. Most contractors will charge between $2 and $5 per square foot for labor. A modest set of 12, 2x2 tiles can cost from $25-$40. There are more extravagant tiles which can cost as much as $100 for a set of 12.
Moreover, ceiling fans are less expensive to operate than air conditioners. National Average Cost of Ceiling Fan Installation. According to various home remodeling cost estimators, the 2013 national average price for new ceiling fan installation in the U.S. ranges from $95-$215, if done as a DIY project.The average DIYer spends around $143 on the project.he majority of homeowners spent around $238-$330 for ceiling fan installations, with an average reported cost of $284. Several websites provide cost calculators that can help you determine the average price range for your specific location and project.