ProtectPlus Industries True Blue Basic pleated HVAC filter for residential furnaces and central air handlers. Captures common household particles - dust, dirt, pollen, lint, and large airborne allergens - while keeping return ducts cleaner. Rated MERV 7 and engineered to last up to 3 months between changes, roughly 23 times more effective than standard fiberglass throwaway filters of the same nominal size.

• Size: 18" x 18" x 1" nominal
• MERV 7 efficiency rating (Basic Protection class)
• Synthetic pleated media - fiberglass free
• Traps dust, lint, dirt, pollen, and larger airborne allergens
• Helps reduce dust and debris buildup inside air ducts
• Sturdy paperboard frame holds shape under airflow
• Service life up to 3 months
• Made in the USA

Tip: Mark the install date on the frame edge with a marker and inspect monthly. Replace when the pleats show visible dust loading or every 90 days, whichever comes first. For homes with pets, smokers, or allergy sufferers, step up to a higher MERV-rated filter line.