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That is a great question. I am always trying to find ways to get my home to be more green. If you will be replacing your unit you will want to look for a high SEER number. Anything higher than 14 is very energy efficient. You can find these units from most of the HVAC service install and repair companies. BGE home, Sears, and your local Heating and Air companies will be able to educate you and give you a good estimate for the system that will work for your home. These same companies can also service your unit to make it work more efficiently and by doing that it will reduce your bills. I hope this helps. Thanks.
Christine Joyce, Realtor, ePRO
Champion Realty
410-507-9968
Tue Jul 28 2009, 06:45