Honeywell replacement FC40R1094 12 x 12 x 3 Return Grille Filter MERV 10.

Please Note: The FC40R series filters were previously being produced with a 4.5-inch depth. When ordering this part you will receive the new 3-inch return grille filter media.

High-Performance Return Grille Filters

When installed into your home’s ceiling or wall return grilles, Honeywell's High-Performance Return Grille Filters provide superior air filtration that could potentially be up to ten times more effective than the standard one-inch filters. Easily installed in minutes by a homeowner, in place of your existing 1-inch throw-away filter. It helps trap airborne pollen, mold spores, dust, bacteria and other allergens that pass through your HVAC system. It can also last up to three times longer than standard one-inch filters, which will require less maintenance for improved indoor air quality in the long run.

  • Superior Performance: Captures up to 85% of particles passing through the HVAC system which is up to 10 times more effective than standard one-inch filters.
  • Increases Efficiency: Filtered air puts less strain on your cooling and heating equipment allowing it to run more efficiently.
  • Perfect Fit: Fits most one-inch ceiling or wall mount return grilles.


Three times the life of a standard one-inch filter. Only replace every 6-12 months, versus monthly or quarterly. This filter media is not cleanable and must be replaced a minimum of twice a year, once in the heating season and again in the cooling season. If your home only has heating, the filter must be replaced annually. Please note, if you have shedding pets, or live in a dusty environment, you will need to replace the filter media more often.


More Information
Manufacturer Honeywell
Product Type Replacement Part
Service Interval 3 to 12 Months
Quantity Included 1
Product Length 11.750
Product Width 11.750
Product Height 3.000
Product Weight 1.150
Filter Size 12 x 12
Color White
MERV Rating 10
Dimension Length 12.000000
Dimension Width 12.000000
Dimension Height 3.000000



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