Seal Proofing Exhaust Fan Ducts

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Q: How does one seal proof exhaust fan ducts? How does one create pest control measures? How does one stop birds from nesting in exhaust fan ducts? A: As shown in the video... *********** Applications: Pest prevention, Fire proofing ***** Relevant Background: "Ventilation is the intentional introduction of outdoor air into a space. Ventilation is mainly used to control indoor air quality by diluting and displacing indoor pollutants; it can also be used to control indoor temperature, humidity, and air motion to benefit thermal comfort, satisfaction with other aspects of indoor environment, or other objectives...The intentional introduction of outdoor air is usually categorized as either mechanical ventilation, natural ventilation[2] , or mixed-mode ventilation (hybrid ventilation)...Mechanical ventilation is the intentional fan driven flow of outdoor air into a building. Mechanical ventilation systems may include supply fans (which push outdoor air into a building), exhaust fans (which draw air out of building and thereby cause equal ventilation flow into a building), or a combination of both. Mechanical ventilation is often provided by equipment that is also used to heat and cool a space..." ("Ventilation", https://en.wikipedia.org/wiki/Ventilation_(architecture)) ******
Relevant Article: "You might like birds and think that it is okay to have them nesting in your home, but expert bird and nest removal is important. Many birds, like starlings, build extremely messy nests with dry twigs, grass, and leaves. These nests can become a fire hazard as they block airflow and trap heat, and this can cause the fan motors and dryers to overheat. Once that happens, the dry nest material can easily become an accelerant, causing a fire to start and spread quickly..Bird nests in your bathroom vent can also mean that the dust, debris, and droppings are disturbed and blown into your bathroom every time the fan is turned on. This can become a health issue. If inhaled, bird droppings can cause histoplasmosis, a serious lung disease. Bird droppings can also cause permanent staining on building material and a bad smell in your home..." ("Birds in Bathroom Vent: Health Hazards Blowing Around Your Bathroom", https://www.skedaddlewildlife.com/blog/vent-health-hazards-in bathroom/#:~:text=These%20nests%20can%20become%20a,to%20start%20and%20spread%20quickly...)
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Location: North America

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