4 Pests Known to Dwell in HVAC Systems

4 Pests Known to Dwell in HVAC Systems


While it’s not a fun thing to picture for any homeowner, it’s possible that their HVAC system might be home to a snake—or more than one snake! Since snakes aren’t able to regulate their own body temperatures, they’re known to seek shelter within ductwork. With that in mind, homeowners should consider the possibility that they have a snake problem with their HVAC unit. Additionally, snakes can wrap around condensers and negatively impact fan blades, making them a serious, frightening nuisance. Since it’s possible that the snake is poisonous, it’s best for homeowners to call a licensed exterminator in order to take care of the serpentine issue.


Mice tend to gravitate toward tight spaces, which eventually leads some mice to seek safety inside air conditioning units. Indeed, it’s common for homeowners to find a mouse or two nestled within their HVAC systems. All told, it’s certainly a more welcome pest problem than finding snakes inside the unit. While mice certainly are cute, they can actually cause significant damage to the HVAC system. Many a cooling company in Leesburg has been called up for issues relating to mice. These rodents are known to chew right through refrigerant lines and HVAC components. They also tend to build nests inside the ductwork, which is a costly repair. It’s advised that homeowners seek to remove the mice from the unit as soon as they discover them.


Cockroaches, dust mites, and spiders enjoy dwelling in low traffic areas of the home. Since the HVAC system certainly qualifies as a low traffic area, they commonly tend to set up camp there. Venomous spiders and other insects might pose a significant threat to the family’s well-being, while dust mites and other less-harmful insects will still potentially trigger allergy and asthma symptoms. Cockroaches and other such insects might even be disease carriers. Homeowners are advised to call an exterminator as soon as they notice the presence of insects in their HVAC units.

Small Mammals

While it’s rare, it isn’t unheard of for homeowners to notice small critters such as raccoons and squirrels dwelling inside their HVAC units. However, it helps to note that these small animals tend to crawl their way into the attic space of a home, meaning it’s likely only a matter of time before they find their way into the home’s ducts. Again, it’s best to call a professional as soon as a homeowner notices the presence of small mammals in their HVAC units. While these systems tend to be built for longevity and durability, they can be significantly damaged if small, sharp-nailed animals find their way into the system’s internals. Additionally, there might be some waste left behind in the ducts for homeowners to arrange to clean.

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