MamaBearTeacher Posted November 20, 2017 Share Posted November 20, 2017 If I am doing both, which should I do first? Quote Link to comment Share on other sites More sharing options...
maize Posted November 20, 2017 Share Posted November 20, 2017 Air ducts first, the cleaning process can get dust in the furnace. 1 Quote Link to comment Share on other sites More sharing options...
maize Posted November 20, 2017 Share Posted November 20, 2017 If you can find someone certified by this organization I was impressed by the folks who did ours: https://nadca.com/# 1 Quote Link to comment Share on other sites More sharing options...
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