The return grille filter provides a high-efficiency, long life alternative to a 1 in filter. Our patented design, unique to the industry, captures a significant amount of the airborne particles, in the air that circulates through the filter.

Honeywell Deep Pleated Return Grille Filter, Series: FC40 Series, Disposable Filter, 23-3/4 in Width, 11-3/4 in Height, 3 in Depth, 10 MERV, 31%, 61%, 86% Filter Efficiency, 0.12 in-WC Initial Resistance, 1150 cfm Air Flow Capacity, 10-1/2 x 22-1/2 in Duct, Additional Information: For Use With Media Air Cleaner

• Mounts in most return filter grilles
• Pleated for greater media capacity
• Low pressure drop provides a comfortable airflow
• Maintains equipment efficiency longer than standard filters
• Captures particles as small as 0.3 um
• Easy installation pre-assembled filter easily inserts into and out of existing return grille
• Exclusive frame design nests properly into place
• Efficiency standard: efficiency ratings are based on American society of heating, refrigerating and air conditioning engineers standard 52.2 to 1999, efficiency ranges are defined for small particles, E1=0.3 to 1 micron, medium particles, E2=1 to 3 micron and large part
• Important - the specifications in this publication do not include normal manufacturing tolerances, therefore, this unit may not exactly match the listed specifications
• Also, this product is tested and calibrated under closely controlled conditions and some minor differences in performance can be expected if those conditions are changed

• Catalog https://assets.unilogcorp.com/267/ITEM/DOC/Honeywell_FC40R1003_Catalog.pdf