How do I size the Trane XC95M furnace for my home?Post created: 2014-07-01 Type of Equipment: Furnace Views: 360
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On 2014-07-01 Danielle wrote:
The only way to know if your furnace is correctly sized is for your HVAC contractor to do a load calculation. A load calculation takes into account the size of your house, the insulation value of your windows, the amount of insulation in your walls and roof, and a host of other criteria to determine the appropriate furnace capacity. The industry accepted standard, the Manual J, is best performed by a professional contractor who has the necessary software and experience to easily complete the task, rather than attempting this yourself.
Ask your HVAC contractor if s/he performed a load calculation before you accept the furnace they recommend. If you are replacing an old furnace (as opposed to buying a furnace for new construction) some contractors may argue that you should simply buy a furnace that's as large as your previous furnace -- but this assumes that the previous contractor selected an appropriately sized furnace. Request that they perform a load calculation, and find another contractor if they refuse.