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Square plastic exhaust grill filter with silicone gasket, 8.19 by 8.21 by 1.65 inches, NEMA 12

HOFFMAN

HOFFMAN HG0900404 Exhaust Grill Filter 8.19 in H 8.21 in L 1.65 in W NEMA 12

SKU CH-MHCM-RCDWW

Protects NEMA 12 electrical enclosures with an 8.19 by 8.21 inch plastic exhaust grill and silicone-gasket filter

  • Plastic construction keeps the grill lightweight yet durable
  • NEMA 12 rating protects enclosures from dust and dripping water
  • Silicone gasket seals the opening to block contaminant ingress
  • 19 in height and 8.21 in length fit standard enclosure cut-outs
  • 65 in width adds minimal depth inside the cabinet

Enclosure cooling accessory

The HOFFMAN HG0900404 is an exhaust grill and filter made from unfinished plastic with a silicone gasket. It is designed for electrical control enclosures that require filtered airflow while maintaining a sealed environment. Buyers who need a ready-to-mount vent for thermal management will find it fits standard cut-outs.

Replaces missing or damaged vents

This unit upgrades an open cut-out or a broken grill by adding filtration and a gasket seal. The jump is worth it when dust ingress threatens internal components and the enclosure must stay NEMA 12 rated. It is not for builders who need active fan assistance or higher airflow than passive convection provides.

NEMA 12 passive airflow limit

The grill relies on natural convection through the filter media so airflow is limited by static pressure and filter loading. It cannot meet cooling demands that require forced-air volume or heat loads beyond what passive exchange can dissipate. Buyers who want higher thermal capacity must add powered ventilation.

Highlights

  • Plastic construction keeps the grill lightweight yet durable
  • NEMA 12 rating protects enclosures from dust and dripping water
  • Silicone gasket seals the opening to block contaminant ingress
  • 19 in height and 8.21 in length fit standard enclosure cut-outs
  • 65 in width adds minimal depth inside the cabinet

Specifications

BrandHOFFMAN

Questions about this item

What cut-out size fits the 8.19 in height and 8.21 in length of this exhaust grill?

The grill measures 8.19 in high by 8.21 in long with a 1.65 in depth, so the enclosure cut-out should match those outer dimensions for a proper NEMA 12 seal.

How is the silicone gasket seated during installation to maintain the NEMA 12 rating?

Press the grill evenly into the cut-out so the silicone gasket compresses fully around the perimeter; skipping this step leaves gaps that break the enclosure seal.

When should the filter media behind the plastic grill be replaced?

Replace the filter when airflow drops noticeably or the media appears clogged with dust, since a blocked filter reduces cooling inside the NEMA 12 enclosure.

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