There are many reasons why pests from cockroaches to mice love the ductwork of the HVAC system. It is safe, dry and warm. What more can they possibly want? Your task is to get rid of them as soon as possible with appropriate air duct cleaning and treatment. Pests can pose a serious threat to the house and to the people living inside. They have to be removed timely.
It is important for you to understand that even though the ductwork is particularly attractive to pests, they do not typically nest there. They prefer less "windy" parts of the HVAC system and the house. That is why you need to take a more comprehensive approach in order to get rid of them. Home air duct cleaning should be the primary task, however.
With effective cleaning, pest debris and droppings will be removed from the system. This is essential since these matters typically carry various bacteria and viruses which can be extremely dangerous to humans and to household pests. All other system components have to be thoroughly sanitized as well. Air filter cleaning or replacement is essential. The precise places where pests hide or nest have to be identified and cleaned. If air duct repair is required, it has to be made timely.
The next part of the project involves the extermination of the pests. This may involve the use of pesticides, humane traps or another type of system. If chemicals will be used, you need to confirm that they are safe for all inhabitants of the house. It is worth pointing out that the extermination process may take a while. That is why secondary residential duct cleaning can be done once the pests have been completely removed.
Finally, measures have to be taken so that another infestation is prevented. These should include regular HVAC maintenance which features both cleaning and thorough inspection.