Mike Lamb 56 Posted June 19, 2019 Report Share Posted June 19, 2019 Both furnaces in this place had these red plugs in the exhaust? The reason? Quote Link to post Share on other sites
Jim Katen 124 Posted June 19, 2019 Report Share Posted June 19, 2019 Perhaps someone had done combustion testing? Quote Link to post Share on other sites
Jim Katen 124 Posted June 19, 2019 Report Share Posted June 19, 2019 or maybe someone just like's the festive look. Quote Link to post Share on other sites
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