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chevellelover
Dec 12, 2010, 08:48 AM
I need to know the age of my furnace Tempstar High Efficiency SP 80 The only numbers I found were ST9120G 2008 and HQ1008773HW and finally LR91984.
Random331
Dec 16, 2010, 10:26 AM
It is from 1991 according to the numbers.