21.5x23.5x1 MERV 8 Air Filter

The Ironside 21.5x23.5x1 MERV 8 pleated air filter delivers everyday defense for your home or office — engineered to keep your HVAC system running clean and your air clear.

• Captures dust, lint, pollen, and dust mites
• True 21.5x23.5x1 fit — sized to drop straight into standard HVAC and furnace systems
• Electrostatically charged, moisture-resistant pleated media
• Made in the USA
• Replace every 30–90 days for best airflow and efficiency

Built here. Breathe better.