How To Measure Your Fireplace Opening For A Mantel

Firebox Sizing & How To Measure:


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X Width of the firebox opening  DF Distance between the firebox and the floor
Y Height of the firebox opening  RHH Height of raised hearth (optional) 
DL Distance to nearest obstruction or edge left of the firebox RHW Width of raised hearth (optional)
DR Distance to nearest obstruction or edge right of the firebox  RHD Depth of raised hearth (optional)