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Plastic Diffusers

Non-corrosive plastic ceiling registers, vents and air returns are ideal for wet and humid areas such as kitchens, locker rooms, showers, indoor pools, dishwashing areas and medical MRI rooms. Larger 2'x2' are made to be installed into a ceiling grid system while our smaller 12" x 12" plastic vents are ideal for rest rooms and showers.

Ceiling Repairs

Black soot and dust on your ceiling tiles can be expensive and difficult to clean or replace. Avoid damage to the ceiling tiles surrounding your ceiling diffusers by installing our unique ceiling dust deflectors. carries many innovative repair products and even offers How-To videos for the do-it-yourselfers.

Air Diverters

Block and redirect annoying drafts from square 2'x2' ceiling diffusers and linear ceiling vents. Our diverters install quickly without the need for tools. Stay comfortable while sitting at your work station. Ideal for offices, restaurants, commercial kitchens and medical facilities.

Item 4873-Tri  Corner Air Diverter

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  • Item 4873-Tri  Corner Air Diverter
  • Air Diverter Flyer
  • Installs over ceiling grid system and under the diffuser
  • Air Diverter Postcard
  • 2.75" high
  • Don't use carboard
  • The 4873 & 4873-Tri will work nicely with a flat style perforated air diffuser.

Corner Air Diverter-White (#4873-Tri)

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Availability: In stock

Regular Price: $29.99
Special Price: $26.99
  • Buy 10 for $25.99 each and  save 4%
  • Buy 20 for $24.99 each and  save 8%


Corner Ceiling Air Vent Diverter

The triangular design of this corner ceiling air diverter lets you divert unwanted cold or hot air from your HVAC system's registers and diffusers away from any location in the room. If you or one of your employees are sensitive to hard-blowing air, this corner air diverter will keep the air away while ensuring the air continues to flow unimpeded throughout the space.

This ceiling air vent diverter is constructed from high-quality, 0.080 gauge polystyrene and at 31.25" wide x 16.75" deep x 2.75" high, it is designed to fit most standard-sized 2'x2' HVAC diffusers, vents, or registers. Ceiling air diverters are not intended to be used in pairs. Only one diverter should be installed on a diffuser, register, or vent at a time so the flow of air is not completely blocked. When installed properly, this diverter will redirect air flow without compromising the integrity of the HVAC system's flow. At, we have a wide selection of ceiling air diverters for virtually every application. Shop our expansive inventory of corner air diverters below and save more.

Additional Information

Item # 4873-Tri

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