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How to Keep Mold Out of Your HVAC System

Mold Growing inside the air handler of an HVAC unit.

Mold Inside the Air Handler

Having mold in your HVAC system is more common than you may think. In fact, when we check an HVAC system during a mold or indoor air quality inspection, we find mold more often than not.

Most of the time the mold is located inside the air handler on the coil. There are two simple reasons for this:Dirty Air Filter

  1. Water is present on the coil when the air conditioner is running, deposited as moisture is removed from the air during cooling.
  2. Air filters inadequately prevent dust (mold candy) from being deposited on the coil, usually because they are of poor quality, do not fit properly, or are missing altogether.

Once mold has begun growing inside the air handler, mold spores are blown into the home’s living space every time the heat or air conditioner runs. This compromises indoor air quality and can cause additional mold growth inside the ductwork and the home. To learn more about ductwork cleaning and how not to be scammed, check out our post: 12 Facts about Duct Cleaning: How to Avoid Scams

To Prevent Mold, Keep Dust Out

So, how do you prevent mold inside the air handler? You cannot remove all mold spores from the air or keep the coil completely dry during the summer. To prevent dust from coming into contact with the coil, ensure that you have a high quality, appropriately sized air filter that is changed, or if it is washable, cleaned on a regular basis. When choosing a washable filter, remember that it must be completely dry before putting it back into the system. For washable filters, it’s better to have two, one to wash, and one to use.

What to Do When You Find Mold in the HVAC

If you have mold inside your HVAC air handler, it’s best to have a professional clean the coil, fan, and possibly the ductwork. This is a service that most HVAC and mechanical contractors offer. Just be sure to look at the coil yourself before they close the unit up, or ask for pictures to verify that the contractor has done a thorough job. Be sure to check out our post: 12 Facts about Duct Cleaning: How to Avoid Scams before hiring a contractor.

Dirty Duct

It should not look like this after cleaning!

How Branch Environmental Can Help

Please contact us if you have questions regarding the potential for mold in your HVAC system, or if you would like to schedule a mold or indoor air quality inspection. Check out our additional resources on mold in our Education Center and indoor air quality.

Call Branch Environmental. We believe that no one should live or work in a building that makes them sick. We will treat your home like it’s our own. From hidden mold sources to major contaminants, we can identify exactly what is going on in your home and rid it of environmental toxins, often for good.

Branch Environmental – Because nobody should live or work in a building that makes them sick.

Call: (706) 510-0335 Schedule Inspection

Disclaimers:

Blog information is NOT intended to provide or replace medical advice. NO information on this site should be used to diagnose, treat, prevent or cure any disease or condition.

*We are an Amazon affiliate company and we do occasionally receive compensation for products that you purchase through links on our website.

Suggestions for products to use are just that, suggestions. You know yourself and your home best. Please do your own research on any product you use in your home or on your skin, and learn all the facts for yourself. Thank you.

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