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It could be a long, hot and very cool summer

for sale sign outside houseDid you know that the first commercial application of air conditioning was in 1902? And yet, residential central A/C didn’t come into its own until the 1960’s. According to the US Department of Energy, air conditioning use skyrocketed in the 1970’s. Since then, A/C units have become more efficient, such that new air conditioners use fifty percent less energy than units from the 1990’s. Additionally, new technologies are making A/C units increasingly environmentally friendly. New developments in air conditioning include non-vapor compression technology, which will be fifty percent more efficient and doesn’t use Hydrofluorocarbons (energy.gov).

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Electric cars grabbing larger share of market

  • Published in Local

Electric cars are coming and coming quickly.

A conference on electric cars and charging stations took place at the Hilton Garden Inn in Rockville April 13.

There are three basic kinds of electrically-powered vehicles. First, there are standard hybrids such as the Prius and its many competitors, which take gasoline and have no plug-in apparatus.

Second are plug-in hybrid electric vehicles (“PHEVs”). They take gasoline and also have plug-in capability. There already are 20 PHEV brand/models in the marketplace.

Third are all-electric EVs. They have plug-in capability only. Both the Bolt and the Leaf, the best-selling model nationally in this category, are EVs, as are Teslas. There are about 15 brand/models of EVs.

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