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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.

Clear Linear Air Diverter. 45 degree angle deflection. Purchase item #4875 for a 90 degree deflection.

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  • Clear Linear Air Diverter. 45 degree angle deflection. Purchase item #4875 for a 90 degree deflection.
  • Clear Linear Diverters for 2' and 4' Long Linear Diffusers.
  • "U" channel included with every linear diverter.
  • "H" Channel for special hanging needs. Call 631-842-0099 to request.
  • Just under 5.5" wide

48" Clear Linear Air Diverters. BUY MULTI PACKS & SAVE $$$ (4874-48-?pack)

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Product Name Price Qty
Clear Linear Air Diverter-48" (#4874-48) $33.99
Package of 2 Clear Linear Air Diverters-48" (item # 4874-48-2pack) $33.49 each Save $2.00 $66.98
Package of 3 Clear Linear Air Diverters-48" (item # 4874-48-3pack) $33.39 each Save $3.60 $100.17
Package of 4 Clear Linear Air Diverters-48" (item # 4874-48-4pack) $33.29 each save $5.60 $133.16
Package of 5 Clear Linear Air Diverters-48" (item # 4874-48-5pack) $33.19 each Save $7.50 $165.95
Package of 6 Clear Linear Air Diverters-48" (item # 4874-48-6pack) $33.09 each Save $9.60 $198.54
Package of 10 Clear Linear Air Diverters-48" (item # 4874-48-10pack) $32.99 each Save $17.00 $329.90

Availability: In stock.


Quick Overview

4874-Clear Linear Air Diverter

This 4' long clear diverter works by pushing the air away in a 45 degree angle. If you are sitting right under the vent, this might not be the best choice. Use item # 4875 to divert air in a 90 degree direction, across the ceiling.

Item #4874 is best used to shield drafts from linear vents along the perimeter of the room or very close to the windows.

Item # 4874-48 actual size: 46.25" long x 5.50" in width. Item # 4874-24 actual size: 22.25" long x 5.50" in width.


45-Degree Linear Diffuser

A 45-degree linear air diverter redirects unwanted, constant blowing air from a ceiling strip-line vent at a 45-degree angle so it is more evenly dispersed throughout the room. This linear air diverter is easy to install. It simply snaps in place with no tools needed. Most importantly, it diverts air flow without compromising or impeding the air flow quality the building's HVAC system is designed to deliver.

Since this linear diffuser is made from 100% high-impact clear acrylic, it blends easily into your office's design and it will last for years. It is designed to fit standard-sized 2' and 4' sections of strip vents, but it can be easily shortened to fit any custom-sized vent using a hack saw with a fine tip blade. This item effectively diverts air at a 45 degree angle. If you are looking for a linear diffuser that diverts air at a full 90-degrees, then you will want Item 4875.

Additional Information

Item # 4874-48-?pack

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