Mold

[Ricky Roland]

have a small rental house that has started a molding problem , never had this propblem with this property or tennant before , heard this could be from ventilation and she had a very dirty filter in the heating and cooling unit could this be the problem , this is a smaller older home with no insulation in the walls

[Randy F.]

Where is the mold? If in bathroom, make sure fan is clean, runs, and that its being used while showering and run at least until mirror fogging disappears. If in bottom corners on walls its lack of air circulation. You can also check and make sure exhaust fan over range works, vent is clear, and that its being used while boiling water etc.

Running an ozone air purifier will kill many types of mold.