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In 1926, G.E. Evans founded a private practice engineering and
http://www.chacha.com/question/who-owns-the-engine...
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Em ht stands for emergecy heat.
http://wiki.answers.com/Q/What_setting_is_EM.HT._o...
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Another point about the emergency heat. Don't run it except when you have to (see below). If you leave the stat set to emergency heat, your electric bill will go through the roof.
http://answers.yahoo.com/question/index?qid=200711...
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emergency heat, which turns off the outside unit and runs only electric resistance heat in the indoor unit. Source(s): hvac contractor.
http://answers.yahoo.com/question/index?qid=200712...
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