Replacement air filter designed to fit model 5443 Aprilaire and EZK 5443 housings. Size: 10 x 12 x 1 inches. Key benefits Correct fit and simple installation: Sized to match 5443 and EZK 5443 filter slots for an accurate, secure fit that installs in seconds. Consistent filtration performance: Built to perform like the original 1 inch replacement, helping control dust, lint, and common household particles while maintaining normal airflow. Reliable maintenance solution: Use as a direct swap during routine filter changes to keep your system operating as intended without special tools or adjustments. Durable construction: Made with stable filter media to withstand regular handling and replacement cycles. Important attributes Function: Air filtration for compatible HVAC, furnace, and air handling units that accept 1 inch filters. Compatibility: Replacement for 5443 and EZK 5443 filter models and other systems that specify a 10 x 12 x 1 inch filter. Size: 10 x 12 x 1 inches, standard one inch thickness for many residential units. Performance: Designed to balance particle capture and airflow for typical home use. Use scenarios Routine seasonal maintenance: Swap in this filter during scheduled quarterly or monthly changes to maintain system cleanliness and airflow. Home renovation or cleaning projects: Install during painting, sanding, or deep cleaning to reduce dust buildup in the HVAC system. Petfriendly households: regularly in homes with pets to reduce hair and visible dust accumulation on vents and components. This replacement filter offers a straightforward, compatible option for maintaining filtration in systems requiring a 10 x 12 x 1 inch 5443 EZK 5443 replacement.