Derek ColeGM, Simmons One Hour Heating & Air · AI HVAC Answers

UV Light: The Secret Weapon Against Mold #shorts

9 Mar 2026 · 1 min

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0:34

In this short video, Derek Cole argues that ultraviolet (UV) light is an effective solution for preventing mold and mildew growth in indoor environments. He illustrates the point by describing a common household doormat that becomes damp and mildewed, then explains that placing the mat in direct sunlight—exposing it to UV radiation and drying—eliminates the growth. From this everyday example, he concludes that indoor air handling systems lack natural UV exposure, and therefore UV lamps should be installed in air handlers to keep HVAC components clean and mold‑free.

Chapters

UV light will solve that problem. If you want to prove that point, everybody at home has that mat at the front or back of the house that has the mildew and it's kind of wet and it's kind of damp. Take that mat, stick it out in the middle of the yard in the sunshine for a period of time, and that will be clean and dry because nothing can grow when UV is present, right? So in the indoor air environment, in the air handler, that is not present. So we have to make it present with UV light. UV light will solve that problem.