Mold on air vents
+2
what causes mold to grow on air vents
5 answers
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There my be faulty ventilation in the ac unit or units.
Janet Pizaro
on Sep 22, 2015
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moisture !
Ken
on Sep 23, 2015
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you probably need to have a moisture barrier and insulation in thee joists underneath the house.
Peppi
on Sep 23, 2015
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In the South this year we have had off the charts humidity resulting in vents & other areas showing mold. The hot steamy air comes from the attic- hits the icy cold air coming from the HVAC vent forms condensation which due to the heavy amount of moisture in the air, forms mold. Fixes = seal with elasticmeric caulk the vent to ceiling, run exhaust fans ( more than 75 CFM ) when cooking & showering, purchase a small portable DEhumidifier 70 pints, run this every day during summer. This will necessitate emptying twice a day. Keep your thermostat around 75 because your HVAC unit is a faint dehumidifier. If you set it too high it will not be called to turn on – so humidity stays in your home and does not leave. This year has been really hot & humid!
Jhunt10
on Sep 23, 2015
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The new codes require the vents to go outside such as your bathroom vent fan etc. you may have to retro-fit to eliminate the problem completely.
Ken
on Sep 24, 2015
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