Hvac Ducts

What’s Creeping in Your Ducts?

October 13, 2019

The air ducts for your central heating system can become infested with all sorts of things, both living and inanimate, and these can hinder your unit’s performance, lower the indoor air quality and impact your health. Below are just a few of the more common creatures and contaminants that residents might find in their ducts.


This fungus can spread in enclosed areas like ducts when the climate is just right: that is, where humidity levels are above 60% and temperatures are between 75 and 85 degrees Fahrenheit. What’s also needed for its growth is the presence of water. This can seep into your ducts through leaks or can form as a result of condensation.

Mold will give off a revolting odor like that given off by dirty socks. At high levels, it can cause health problems: runny noses, sneezing and scratchy throats in some but, over a long period of time, respiratory conditions and even brain damage in others.

Leave mold abatement to the pros. The process normally involves vacuuming the mold spores with a HEPA-filtered vacuum and wiping down the vents with an antimicrobial agent.


You might notice a puff of dust from the air filters every time you turn the heater on. This means the ducts are filled with it, probably along with other debris (pollen and, if applicable, pet dander).

Your air conditioning and heating unit links to the outside air, so it’s only natural that pollutants will enter the ducts and collect there. This is why recurring air duct cleanings are highly recommended. At the very least, the air filter should be replaced regularly. Cheap fiberglass filters last about 30 days while higher-quality pleated filters last between three and six months.

Dust and debris will make your indoor air unhealthy, especially for dust allergy sufferers. Colds, sore throats and continual coughing can all be traced back to this build-up. In extreme cases, dirty ducts can create a condition known as sick building syndrome, where everyone suffers from respiratory issues to a greater or lesser degree.


Mice and rats can infiltrate your home looking for a warm place to feed and build a nest. If the ducts are not sealed, they may become the rodents’ target. Rats can transmit plague, salmonella and a virus called hantavirus through their feces, urine, and saliva. They can also enter your home, contaminate your food and bite you. A professional can eliminate these pests with traps, access control, and other methods.

Contact the air duct experts today at Hagerstown Heating & Cooling for professional duct cleaning service!

You May Also Like

Is Fall Furnace Maintenance in Sharpsburg, MD, Worth the Cost?

Is Fall Furnace Maintenance in Sharpsburg, MD, Worth the Cost?

You have many expenses associated with maintaining your home in Sharpsburg, MD. The inevitable question is which ones are actually worth the cost you'll incur. Here's why fall furnace maintenance is worth every penny you'll invest: Fewer Repairs Furnace repairs can...

3 Signs You Need a New Furnace Installed in Clear Springs, MD

3 Signs You Need a New Furnace Installed in Clear Springs, MD

The autumn should urge you to schedule HVAC maintenance, ensuring your heater works efficiently this winter. However, sometimes maintenance and repairs can only go so far to saving your furnace. Here are some signs that indicate you need a new furnace installed in...

Don’t Let Your HVAC System Cost You Sleep in Fairplay, MD

Don’t Let Your HVAC System Cost You Sleep in Fairplay, MD

A high-quality HVAC system in your Fairplay, MD, home can work wonders for your energy levels while you're awake. It can also have a positive impact on your sleep. Here are three ways your existing HVAC setup might be compromising your sleep quality: Doesn't Cool Your...

Why Choose Us

shield icon

We offer 100 percent money back and ultimate buy back guarantees.

icon 24 hours

We are prompt, courteous, honest and answer all your questions.

percent icon

We wear shoe covers, use protective mats and clean the work area.

shield icon

Our super techs go through 90 hours of intense training every year.

handshake icon

We walk you through the entire process and provide upfront estimates.

  • This field is for validation purposes and should be left unchanged.

Pin It on Pinterest

Compliance Settings
Increase Font Size
Simplified Font
Underline Links
Highlight Links