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It is a wonderful thing to be able to flip a switch, and have an entire room cooled off through air conditioning. Portable room air conditioners make sense when you wish to cool certain parts of your home, office, or covered outdoor living spaces. Air conditioning is commonly found in buildings today, but it was not always the case throughout history.

Wealthy ancient Egyptian families could enjoy the cooling benefits brought from aqueduct water that traversed the insides of walls in buildings. Water was an expensive commodity in that hot region of the world, so only the rich could afford this luxury. Medieval Persians made use of wind towers and cisterns to cool their buildings. Wind would be captured in the wind tower, and it was then directed over the water in the open cistern, which would evaporate and cool the ambient temperature inside the dwelling.

Later on, the idea that liquefied ammonia, when it evaporated, could cool the air was thought up by British scientist Michael Faraday in 1820. In America in 1842, Dr. John Gorrie created a machine to make ice, and he used the ice to cool the air in his hospital in Florida.

Industry was the primary reason that air conditioners were created around the turn of the last century in the United States. Willis Haviland Carrier created the first electrical air conditioner in 1902, which was used to cool and dehumidify the air in a printing plant. The term "air conditioning" was coined by American Stuart W. Cramer in 1906, who came up with a way to add moisture to the air, which was crucial in his textile manufacturing mill.

Toxic gases were used to run the early air conditioners, but Thomas Midgley, Jr. created Freon refrigerant in 1928. Unfortunately, he did not know that Freon is bad for the ozone, and recently newer refrigerants have been developed that are safer for the environment.

Air conditioning is not only used today to make our homes and other buildings more comfortable. You will find air conditioning used in land, water and space vehicles. Air conditioning is used to also filter out bad particles in the air, such as in hospital operating rooms. If you have allergies or asthma, air conditioning can help remove the pollen, dander and dust that causes these conditions to flare up. The elderly can also be at risk if they are in a too-hot building, so air conditioning can be crucial for their well being. Some air conditioners are also dehumidifiers, which take the excess moisture out of the air to make you more comfortable in terms of your temperature. Today we are lucky that a great air conditioner is your answer for cooling comfort.

Susan Slobac has been a home improvement and appliance professional for many years. She is featured in many publications as being an expert in appliaces such as air conditioners, portable air conditioners and home appliances

Charcoal filters may not be on the minds of everyone but after reading this, you may see where the filters will need to be on your mind. Charcoal filters are being used as water filters and there are some advantages that you may want to learn about.

Charcoal Water Filters is basically made from the husk of coconut. One of the reasons that charcoal is worked with extensively as a water filter is because the charcoal water filter acts as an absorbent. The advantage in using charcoal is because the charcoal will absorb impurities, often toxic, when the water runs past the charcoal in the water filter.

Believe it or not, charcoal water filters are absorbing much of the impurities found in water. Whether you use a filter which is in ground bits or has a large mass of charcoal, it is effective in stopping the impurities from reaching so much as your glass of water.

Charcoal water filters are designed to last anywhere from six to nine months when used regularly. The great thing people are discovering about these unusual water filters is how it actually interacts with silver which is activated. When activated silver is combined in use with the charcoal filters, there is the added advantage of antibacterial protection for your water.

Charcoal filters for water filters are becoming a choice product not only are they recognized by the EPA for doing what they need to do but they are also recognized for the simplicity in the installation as well as the economical factor. Families are finding that the charcoal filters they use are pretty much in line with some of the more notorious water filters. Economically, families which choose to use the charcoal water filters find that they can easily afford these filters and they are not bothered by the many toxins which are found in many communities within the water supply.

Charcoal water filters are rated on how well they remove contaminants most often found in the water supply which has no filtering process in place. The charcoal water filters are to be readily able to remove the deadliest contaminants which are at this time, giardia and cryptosporidium. If the charcoal water filters can handle these contaminants, then the filters are believed to do their job as effectively as possible and this is one reason for their mainstay in the water filtering marketplace.

Peter Vermeeren is the owner and webmaster of: Water filters and Osmosis - Airsoft | Ropa Militar - Welding Machines