Air Filter 18'' x 18'' x 1'' 4-MERV Fiberglass, AAF Flanders 10055011818 (12-PK) BRAND NEW! THE BOX WAS OPENED AND INSPECTED. The AAF Flanders 10055011818 EZ Flow II air filter is an 18x18x1 inch disposable fiberglass filter designed for efficient, low-resistance performance in residential and light commercial HVAC systems. With a MERV 4 rating, it captures common airborne contaminants such as household dust, lint, pollen, mold spores, and larger debris, helping to maintain clean system components and support consistent airflow. It is ideal for basic air filtration in homes where high-efficiency filtration is not required but equipment protection is essential. Constructed with continuous filament spun-glass fiberglass media and reinforced with a resinous bonding agent, this filter resists compression and maintains integrity under airflow pressure. The non-pleated, non-electrostatic design ensures minimal static pressure drop, promoting energy-efficient operation of furnaces and air handlers. The self-retaining construction features a one-piece heavy chipboard frame sealed to the media with hot-melt adhesive on both upstream and downstream sides, eliminating air bypass and corner separation without the need for a metal retainer. UL Class II rated for fire and smoke safety, this filter meets recognized standards for use in air handling applications. It is trimmable, allowing for minor adjustments to fit non-standard filter housings. Weighing just 0.358 lbs, it is lightweight and easy to install in standard 18x18x1 compartments found in return air grilles, furnaces, and air conditioning units. Recommended for monthly replacement, the EZ Flow II helps prevent dust buildup on blower motors, coils, and ductwork. While it does not capture viruses or ultrafine particles, it provides reliable, cost-effective performance for general-purpose heating and cooling protection. Features - Nominal size: 18x18x1 inches for standard HVAC compatibility - Actual size: 17-7/8 x 17-7/8 x 3/4 inch for secure fit - MERV 4 rating for improved capture of common airborne particles - Fiberglass media with low airflow resistance and high dust-holding capacity - Captures dust, lint, pollen, mold spores, bacteria, and smoke particles - One-piece chipboard frame with full-perimeter adhesive seal - Self-retaining design requires no metal retainer - Trimmable for minor size adjustments - UL Class II rated for flame and smoke safety - Ideal for residential furnaces and air conditioning systems Specifications - Brand Name: AAF Flanders - Model Name: AAF Flanders 10055011818 - Part Number: 10055011818 - UPC: 031949150358 - Alternative UPC: 037947196435 - Product Type: Air Filter - Air Filter Type: Fiberglass - Filter Class: Class II - MERV Rating: 4 MERV - Nominal Filter Size (HxWxD): 18x18x1 - Air Filter Size: 18x18x1 - Actual Size: 17-7/8 x 17-7/8 x 3/4 inch - Length: 18 inches - Width: 18 inches - Depth: 1 inch - Height: 18 inches - Pleated: No - Electrostatic: No - Metal Mesh Support: No - Filter Frame Material: Chipboard - Media Material: Fiberglass - Filters Dust/Lint: Yes - Filters Pollen: Yes - Filters Mold Spores: Yes - Filters Bacteria: Yes - Filters Smoke: Yes - Filters Viruses: No - Trimmable: Yes - Number of Items: 1 - Item Weight: 0.358 lbs - Packaging Type: 1 pk - Suggested Users: Unisex-Adult - Manufacturer: AAF Flanders - Country of Origin: United States Product Application The AAF Flanders 10055011818 EZ Flow II MERV 4 fiberglass air filter is engineered for use in standard residential HVAC systems requiring a dependable, low-cost primary filter. Its efficient design helps keep internal components clean, improves airflow, and extends equipment life. Recommended for monthly replacement, it is best suited for homes without severe air quality concerns, providing consistent performance in furnaces, air handlers, and return air grilles. With its trimmable feature and durable one-piece construction, it offers flexibility, reliability, and easy maintenance for everyday heating and cooling protection.