On Dec 4, 6:53 am, "James" wrote:
Whenever it is winter I tend to get scratchy throat prone to getting sinus
infection just sitting at home. Since I live in a rainy winter area, I
wonder if there is mold growing somewhere and leaking into the hvac.

I see DIY mold test kit online. I believe they are dishes filled with agar
gel. Can these kit really tell the difference between toxic mold versus not
so toxic ones (e.g. mold that grows on bread)?

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Yes a mold test kit can determine with great accurasy, the interior
conditions. The LOWES in my region also has thm for sale..maybe stores
around you will too. A three pack is under 20 bucks here.