3 Slot - Triple Slot - Linear Slot Diffusers - White

At Texas Buildmart, our 3-slot linear slot diffusers represent modern HVAC design excellence.
These aluminum diffusers feature adjustable pattern controllers rotating 180° for precise air
pattern control and superior air distribution. Each slot provides exceptional air flow with air
curtain capabilities for supply or return applications. Engineered for easy installation on ceilings, walls, or floors, they're available in multiple lengths from 12" to 72" and pair with matching plenum boxes. Trusted by architects and builders, these slot diffusers deliver modern aesthetics while meeting industry standards for residential and commercial projects.

Need Submittals on our products?  Email us at: sales@texasbuildmart.com

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Sleek aluminum diffusers that match your aesthetic.

Built for Modern Spaces

Our 3-slot linear diffusers are made from 100% commercial-grade aluminum, so they’re built to resist corrosion, stay clean, and last for years. Finished with a smooth electrostatic powder coating, each diffuser delivers a clean, modern appearance that works in both residential and commercial spaces.

Adjust direction and flow with precision

Total Airflow Control

Our 3-slot diffusers come equipped with fully adjustable directional dampers, giving you complete control over airflow direction. Each slot is 3/4" wide and can be rotated for up to 180° of pattern adjustment. Use them as return or supply applications for total flexibility

Designed for walls, ceilings, or floors

Easy to Install, Easy to Maintain

Our 3-slot diffusers are designed for inner mount installation, making them ideal for ceilings, walls, or floor applications. Each unit features pre-drilled screw holes hidden behind the adjustable dampers, allowing for a clean finish without visible fasteners. Whether you’re a contractor or DIY installer, setup is straightforward.

From compact rooms to wide-open layouts.

Multiple Sizes to Match Your Build

From tight hallway ducts to large open rooms, we offer linear slot diffusers in all standard lengths: 12", 18", 24", 36", 48", 60", and 72". Each diffuser is designed to fit standard duct openings, and you can pair them with matching insulated plenum boxes for enhanced air distribution.

Engineered to meet top airflow and HVAC standards.

Industry-Backed Performance

Our diffusers are built to meet ASHRAE 70 and ANSI S12.51 standards, ensuring reliable performance and acoustic quality. When airflow and aesthetics matter, Texas Buildmart delivers with trusted engineering and construction-grade quality you can count on.

Trusted by builders across the U.S.

Fast Shipping. Proven Support.

Most orders ship in just 2–5 business days, so your project stays on track. Questions? Need a submittal or help choosing the right plenum box? Contact our knowledgeable team at sales@texasbuildmart.com or (956) 900-1103 — we’re ready to help.

Ready to Install

No custom cutting or special tools needed. Our vent covers and diffusers are designed for quick, seamless installation.

Built to Perform

Made from 100% aluminum, every product resists corrosion, cleans easily, and delivers long-lasting durability.

Fits Just Right

Designed to meet commercial standards and residential needs, our products offer a precise fit straight out of the box.

Modern by Design

Forget dated, clunky vents—our sleek diffusers are made to match today’s contemporary interiors, not clash with them.

Frequently Asked Questions

What Our Customers Say

"This company is fantastic to work with. I bought two of this product and they both arrived dented. The company sent me two new ones which arrived in perfect condition."

Scott F.

What Our Customers Say

"Great selection at a reasonable price. Quick to ship the order too!"

Karen K.

Why Choose Texas Buildmart?

At Texas Buildmart, we don’t just sell vent covers, we solve real-world design and functionality problems. It all began over 20 years ago, when a small construction company, Skuadra Developers, couldn’t find modern vent covers worthy of the homes they were building. So, they teamed up with Texas Buildmart to create air vent covers they’d be proud to install. The response from builders and designers was immediate. Since then, we’ve evolved through four generations of product innovation, always pushing for quality, clean design, and easy installation. What started as a solution for contractors became a go-to brand for designers, builders, and now homeowners across the U.S.