rjaacks Posted December 16, 2010 Report Posted December 16, 2010 Trying to determine the age of a Williamson Temp-O-Matic natural gas furnace. Model #1117-10-5 Style 131 Anyone help?
MMustola Posted December 16, 2010 Report Posted December 16, 2010 According to my Preston's Guide, that model number was made in 1978, 79, and 80. It is 100,000 btu.
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