Ultra Aire Merv-13 Filter - 4 pack - 4037731

• Designed to trap particles down to 0.3 microns
• 90% ASHRAE Dust Spot
• 9” x 11” x 1”

MERV 13 filters come standard in all Ultra Aire whole house ventilating dehumidifiers and more effectively filter contaminants like microscopic allergens, bacteria, smoke, and PM2.5. These filters can be vacuumed cleaned on a regular basis but should be replaced every 6 months.