They grow in places we would not expect. They are elusive and will be more prevalent at different times of the day or night depending on the type of mold. A single mold can germinate and produce hundreds of thousands of airborne spores in 4-9 days. Surveys have shown that high mold and pollen counts frequently occur at the same time of year. Hay fever symptoms may be caused by mold rather than pollen.
Mold needs moisture, food, which can be any organic matter, and preferably warm temperatures.
Molds are found in soil and in decaying leaves, straw, grains, and wood. Any contact with these things can expose you to mold. The use of ceiling fans in lieu of air conditioning can increase mold levels in homes. Inefficient Filters Inefficient filters allow dirt to accumulate on coils, the drain pan, and duct work. Washable, electrostatic filters which contain media treated with an anti-microbial inhibitor are preferred and have proven effective in reducing mold levels in homes.