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hi i am dan i can help you with this. depending on the price differance your contractor is offering for each system will determine what is best for you. also one thing to keep in mind is to check if your local energy companies are offering any rebates for higher efficiency equipment. for example where i am or utiliy companies offer a $600 rebate fur air handlers and furnaces that have an ecm high efficency blower motor in them. also make sure your contractor is sizing the equipment corectly by measuring the whole house all the doors and windows and insulation and doing the calculations to determine the correct size equipment.
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