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White fiberglass exhaust fan with 20 inch blades and coated steel guard

Dayton

Dayton 1BLJ5 20 in fiberglass exhaust fan 115 V

SKU CH-H52B-E032W

Corrosion-resistant shutter-mount exhaust fan with a 20 in fiberglass blade delivering 800 cfm airflow at 7.2 sones for a 21 in cut-out

  • typeCorrosion Resistant Shutter Mount
  • 20-inch fiberglass blades resist corrosion in damp environments
  • 800 cfm exhaust airflow at zero static pressure clears air quickly
  • 2 sones maximum noise keeps operating sound moderate
  • Fiberglass frame and coated steel guard withstand harsh conditions
  • 115 V supply fits standard North American circuits

Dayton 20 in fiberglass exhaust fan

The Dayton 1BLJ5 is a corrosion-resistant shutter-mount exhaust fan with a 20 in fiberglass blade and fiberglass frame. It operates on 115 V power and delivers 800 cfm of exhaust airflow at .000 in static pressure. The steel guard features a coated finish for added durability in harsh environments. Maximum noise output is rated at 7.2 sones during operation.

Practical limits of 115 V shutter-mount exhaust

This unit requires a 21 in cut-out width for proper installation in a wall or ceiling opening. Performance is rated at zero static pressure, so actual airflow will drop when ductwork, grilles or filters add resistance. The 115 V supply limits use to standard North American residential or light-commercial circuits. Fiberglass construction resists corrosion but may not suit high-impact industrial settings where metal blades are preferred.

Installation notes and common issues

Shutter-mount design allows direct fitting into the prepared opening without a separate sleeve, reducing parts needed. Wiring must comply with local electrical codes for 115 V fan circuits and should include a suitable disconnect. The coated steel guard ships attached; verify it is secure before energising. California Proposition 65 warnings apply because the product contains chemicals known to cause cancer and reproductive harm.

Highlights

  • 20-inch fiberglass blades resist corrosion in damp environments
  • 800 cfm exhaust airflow at zero static pressure clears air quickly
  • 2 sones maximum noise keeps operating sound moderate
  • Fiberglass frame and coated steel guard withstand harsh conditions
  • 115 V supply fits standard North American circuits

Specifications

BrandDayton
typeCorrosion Resistant Shutter Mount

Questions about this item

Which blade diameter should I choose for a 21 in cut-out?

The 20 in blade diameter is designed to fit a 21 in cut-out width, so this single size matches that opening.

What does the 800 cfm airflow rating mean once the fan is installed?

At zero static pressure the fan moves 800 cubic feet of air per minute; actual airflow will be lower once ductwork or shutters add resistance.

How loud is 7.2 sones in a typical room?

7.2 sones is roughly the sound of a busy office or a quiet street, noticeably louder than a refrigerator but well below a normal conversation.

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