Very likely growth at the handler, and it is the most correctable mold problem in this city. A Gulf air conditioner makes condensate by the gallon; a drain that clogs, a pan that holds water, or a plenum with a cold surface in humid air grows growth the system then delivers to every room. The scope is drain, pan, and plenum, with duct material read honestly, flex with internal growth gets replaced, and the finding is verified after the system has run a full hot day.
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