While it might seem like a good idea to put a screen on your furnace intake and exhaust vents to prevent debris, insects, or small animals from entering, it is generally not recommended. Adding screens can potentially create safety concerns and reduce the efficiency of your furnace. Here are a few reasons why you should avoid using screens on your furnace intake and exhaust: Restricted airflow: Screens can restrict airflow, leading to reduced efficiency and potential strain on your furnace system. Reduced airflow can also cause the furnace to overheat or experience other issues that may require repairs. Condensation and ice buildup: In colder weather, screens can trap moisture and cause ice buildup, which can block the vents and create safety hazards. This can also lead to damage to your furnace and reduce its efficiency. Maintenance issues: Screens can become clogged with debris, requiring regular cleaning and maintenance. If not cleaned regularly, the screens can cause additional strain on your furnace system and lead to operational issues. Safety concerns: Most furnace manufacturers do not recommend adding screens to intake and exhaust vents, as they can create safety concerns and may void warranties. Instead of adding screens, make sure your intake and exhaust vents are properly installed and maintained, following the manufacturer's recommendations. Regularly inspect the area around your vents to ensure there are no obstructions or potential issues. If you're concerned about debris, insects, or small animals entering your furnace intake or exhaust vents, contact Martino HVAC. Our technicians can provide guidance on the best practices for your specific furnace system and ensure it is operating safely and efficiently.