Mike Lamb Posted June 19, 2019 Report Share Posted June 19, 2019 Both furnaces in this place had these red plugs in the exhaust? The reason? Link to comment Share on other sites More sharing options...
Jim Katen Posted June 19, 2019 Report Share Posted June 19, 2019 Perhaps someone had done combustion testing? Link to comment Share on other sites More sharing options...
Jim Katen Posted June 19, 2019 Report Share Posted June 19, 2019 or maybe someone just like's the festive look. Link to comment Share on other sites More sharing options...
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