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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. 1800ceiling.com 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.

Best Sellers

Below you will find some of our best selling items, including our most popular and reliable air diffuser, air deflector, leak diverter, and HVAC diffusers. To view our complete inventory of products, please click on the different categories located on the left side of the page. We carry many solutions for ceiling cleaning and ceiling repair in addition to our inventory of air diffusers, air deflectors, leak diverters, and HVAC diffusers.

24 Item(s)

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24 Item(s)

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Clear Acrylic Prismatic Lens @.125 gauge. Also available in .100 gauge (residential thickness)
2'x4' Clear Acrylic Prismatic Light Lens. STOCK SIZES Pack of 2,3,4 or 5 lenses.
As low as $41.98

We have the best prismatic light lens replacement lenses in clear acrylic. You won't find these in your local home center store. The .125 gauge is a commercial thickness lens and is strong enough to sit in a standard ceiling grid system without additional support.  The  23-3/4" x 47-3/4" x .125 gauge are cut to fit in a 2'x4' ceiling grid system. The 22-1/2" x 46-1/2" lens is cut to fit in a light lens frame. Available in .125 gauge and the thinner, residential grade of .100 gauge. Measure your existing lens before ordering! If your size is not listed, we can custom cut the lens for you, use our custom size page. Lenses are sold in packages of 2,3,4 or 5 pieces.  Note: we do not sell the 23-3/4" x47-3/4" light lens is the thinner .100 gauge.


Please do not call to order custom lenses. Put all information in an email:size, thickness, shipping address etc. We will reply via email with a proposal and shipping costs. Send to sales@1800ceiling.com

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Actual length is 59-3/4" from outside edge to outside edge.
5' Long White Linear Air Diverter (4875-60-xx) 1 slot, 2 slot, 3 slot or 4 slot linear diffusers/vents
As low as $39.99

Item # 4875-60 5' Long Linear Air Diverter


 5' Long White Linear Air Diverters are available to fit 5' sections of linear air diffusers with air vents of 1 slot, 2 slot, 3 slot and 4 slot. Stop unwanted hard blowing air from making you uncomfortable with these linear air diverters. Made from .080 gauge polystyrene high impact construction. Made from two sections of our popular 4' Linear Air Diverters.  Actual length of the 4875-60 from outside edge to outside edge is 59-3/4" long. We also carry Linear Air Diverters for 2' and 4' Linear Diffusers.

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Clear Linear Air Diverter. 45 degree angle, Purchase item #4875 for a 90 degree deflection.
Clear Linear Air Diverter for a 45 Degree Deflection (4874-xx)
As low as $26.99

4874-Clear Linear Air Diverter


This 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.

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Plastic Air Diffuser in 2'x2' ceiling grid.
White Plastic Air Diffuser (#4945W-xx)
As low as $59.95

4945 Plastic Air Diffuser


Item 4945-Plastic Air Diffuser and Plastic Ceiling Diffuser for ceiling grid systems. 3-Tier Air Diffuser Assembly. 4-Way air distribution. Available in White, Beige & Black ABS Plastic.


Click on the YouTube icon to watch the how to video.

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Actual size 23.75" x 23.75". Designed to fit in a 2'x2' ceiling grid system
White or Black Plastic Perforated Ceiling Tiles/Vents
As low as $32.95
Replace old rusted metal returns or egg crate style returns with our non-corrosive Plastic Perforated Ceiling Tile & Return.
Fits nicely in a 2’x2’ ceiling grid system. Lets return air and heat escape to the plenum.
Made of durable ABS plastic. Available in white with .25" hole or .375"
Available in black with .25" hole size. Learn More

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Item 4986MRI-Plastic Diffuser
Plastic Air Diffuser MRI Non Metal (#4986MRI-xx)
As low as $69.95

ITEM # 4986MRI. MRI ROOM Plastic air diffuser with collars from 6-18 inches. Contains no metal. Ideal for hospitals, MRI rooms and clean rooms. Available in White or Black ABS plastic. Fits in a 2'x2' ceiling grid system.


 Click to watch our how-to video on Youtube.com

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Item 4988W  White Plastic Air Return
White Plastic Return Air with Back Plate (#4988W-xx)
As low as $71.00
Two foot by two foot Plastic Air Return with collar sizes from 6"-18" or a unit with a 20" x 20" lay in. Keep your business looking clean. Ideal for restaurants, hospitals, office buildings and clean rooms. Learn More

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13oz Black Drainage Tarp-Heavy Duty
13oz. Heavy Duty Drainage Tarp, Vinyl Polyester-Translucent or Black
As low as $37.99
ITEM # 4935 Heavy Duty 13 oz flame retardant vinyl laminated polyester. These heavy drain tarps protect personnel and equipment from overhead leaks. Great for warehouse, gymnasium and convention halls.These are tarps ARE NOT Anti-Static.
Custom sizes available. Please email your requests to sales@1800ceiling.com. Please include custom sizing, color and your ship to address. We will respond with a formal proposal with shipping charges. Learn More

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Poly Pro Tape for Dual Tac Dispenser (6 roll minimum for free shipping)
Poly Pro Tape for Dual Tac Disp.(#4806) FREE SHIPPING!
$4.09
As low as: $3.19

4806 Dual Tac Tape


FREE SHIPPING in U.S. via USPS Priority Mail. (6 roll minimum order)


Item # 4806 Poly Pro Tape for 3M Dual Tac Dispenser.

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3'x25' Pipe Leak Tarp with 3/4" hose bib in the center. Custom sizes available.
3'x25' Pipe Leak Tarp. (4936-3x25)
$114.99
As low as: $104.99
ITEM # 4936-3x25 Pipe Leak Tarps are made from 12-mil reinforced polyethylene fabric in silver/black color. 3' x 25' long Pipe Leak Tarps are perfect to catch drips from plumbing pipes and HVAC duct. Custom sizes available. Learn More

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SAV-A-CEILING 5 gallon bucket
SAV-A-CEILING Architectural Ceiling Coating (#4801)
$145.00

4801-SAV-A-CEILING


4801-Spray Application


Watch the YouTube video's. Item 4801 SAV-A-CEILING Architectural Ceiling Coating-5 Gallon Pail. View product specification sheets and U.L. Lab Test data by clicking this link.

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4G case
4' Grid Cover-126/case (#4815-126)
$191.52
ITEM # 4815-126.
Ceiling Armor 4' Grid Cover case of 126 pieces Learn More

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Install RetroFit Frame in ceiling grid system
Lighting Frame Replacement (#4710)
As low as $34.00

Item #4710 Retro Fit Replacement Kit. Click the YouTube icon below to watch the installation video.


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Clear Acrylic Prismatic Lens @.125 gauge. Also available in .100 gauge (residential thickness)
2'x2' Clear Acrylic Prismatic Light Lens. STOCK SIZES Pack of 2,3,4 or 5 lenses.
As low as $29.98

We have the best prismatic light lens replacement lenses in clear acrylic. You won't find these in your local home center store. The .125 gauge is a commercial thickness lens and is strong enough to sit in a standard ceiling grid system without additional support.  The 23-3/4" x 23-3/4" x .125 gauge lenses are cut to fit in a 2'x2' ceiling grid system. The .100 gauge is slightly thinner than the .125 gauge and can be used for residential or light commercial/office applications. 


Measure your existing lens before ordering! If your size is not listed, we can custom cut the lens for you, use our custom size order page. Lenses are sold in packages of 2,3,4 or 5 pieces.


Please do not call to order custom lenses. Put all information in an email:size, thickness, shipping address etc. We will reply via email with a proposal and shipping costs. Send to sales@1800ceiling.com

Learn More

Add to Wishlist | Add to Compare

Clear Acrylic Prismatic Lens @.125 gauge. Also available in .100 gauge (residential thickness)
1'x4' Clear Acrylic Prismatic Light Lens. STOCK SIZES Pack of 2,3,4 or 5 lenses.
As low as $29.98

We have the best prismatic light lens replacement lenses in clear acrylic. You won't find these in your local home center store. The .125 gauge is a commercial thickness lens and is strong enough to sit in a standard ceiling grid system without additional support.  The 11-3/4" x 47-3/4" are cut to fit in a 1''x4' ceiling grid system. The 10-1/2" x 46-1/2" are precut to fit in a fluorescent light lens fixture. The .100 gauge/thickness are ideal for residential fixtures or light commercial/office buildings. Measure your existing lens before ordering! If your size is not listed, we can custom cut the lens for you, use our custom size order page. Lenses are sold in packages of 2, 3, 4 or 5 units.


Please do not call to order custom lenses. Put all information in an email:size, thickness, shipping address etc. We will reply via email with a proposal and shipping costs. Send to sales@1800ceiling.com

Learn More

Add to Wishlist | Add to Compare

24 Item(s)

per page
24 Item(s)

Grid  List 

Set Descending Direction