This is a standard grade furnace filter of the same type that has been protecting furnaces and central air conditioners around the world for over 50 years. The filtering medium is continuous filament spun glass. The frame is made with one continuous piece of chipboard to guard against corner separation. For peak equipment protection and energy efficiency, these filters should be changed monthly in periods of high use.

• Brand Name: Ace
• Width: 12 in.
• Height: 24 in.
• Depth: 1 in.
• Filter Material: Fiberglass
• MERV Rating: 4 MERV
• Pleated: No
• Product Type: Air Filter
• Number in Package: 1 pk
• Actual Size: 11-7/8 x 23-5/8 x 3/4 in.
• Electrostatic: No
• Filters Smoke: yes
• Trimmable: No
• Filters Bacteria: Yes
• Filters Viruses: No
• Filter Frame Material: Cardboard
• Filters Pollen: Yes
• High Efficiency: Yes
• Metal Mesh Support: No
• Air Filter Size: 12x24x1
• Filters Dust/Lint: Yes
• Filters Mold Spores: Yes