Filtrete MERV 11 Allergen Defense Air Filter – HVAC Furnace Filter – Fast Ship

Filtrete MERV 11 Allergen Defense Air Filter provides superior allergen filtration for residential and light commercial HVAC systems. MERV 11 captures fine particles including smoke, smog, and fine dust, ideal for households with allergy sufferers.

• MERV 11 Rating — Captures particles 1–3 microns including smoke, smog, and fine dust
• Electrostatically charged — 3x better filtration than standard MERV 8 filters
• 1-inch depth — Fits standard residential and commercial air handlers
• 3-month replacement interval — Replace every 90 days for optimal performance
• Ideal for households with allergy sufferers, pets, or smokers

Select your filter size from the dropdown. All sizes ship within 1–2 business days.