crabapplemcn
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I am building a house with the 2nd floor zoned off from the main floor/basement. The standard furnace is the Trane XR90. I can upgrade to Trane XL90 for $450. I know little about furnaces and was wondering what is the difference b/w these two and is it worth it to upgrade. Here are links to both. Thanks
http://www.trane.com/Residential/Products/Furnaces/XR90-Furnaces
http://www.trane.com/Residential/Products/Furnaces/XL90-Furnaces
http://www.trane.com/Residential/Products/Furnaces/XR90-Furnaces
http://www.trane.com/Residential/Products/Furnaces/XL90-Furnaces