---
product_id: 424124963
title: "BUILDMART - 12\" Plenum Box for [12\" Linear Slot Diffuser - (1 Slot) Single Slot] Premium Insulated Galvanized Sheet Metal Plenum Box for Heating and Cooling - Texas Buildmart"
brand: "buildmart"
price: "C$14370"
currency: NIO
in_stock: true
reviews_count: 2
category: "Buildmart"
url: https://www.desertcart.ni/products/424124963-buildmart-12-plenum-box-for-12-linear-slot-diffuser-1
store_origin: NI
region: Nicaragua
---

# Precise 13.2" x 2.9" x 11.9" dimensions Foam insulated galvanized sheet metal Patent-pending design with hidden screw installation BUILDMART - 12" Plenum Box for [12" Linear Slot Diffuser - (1 Slot) Single Slot] Premium Insulated Galvanized Sheet Metal Plenum Box for Heating and Cooling - Texas Buildmart

**Brand:** buildmart
**Price:** C$14370
**Availability:** ✅ In Stock

## Summary

> 🛠️ Upgrade your airflow game with sleek, silent efficiency!

## Quick Answers

- **What is this?** BUILDMART - 12" Plenum Box for [12" Linear Slot Diffuser - (1 Slot) Single Slot] Premium Insulated Galvanized Sheet Metal Plenum Box for Heating and Cooling - Texas Buildmart by buildmart
- **How much does it cost?** C$14370 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ni](https://www.desertcart.ni/products/424124963-buildmart-12-plenum-box-for-12-linear-slot-diffuser-1)

## Best For

- buildmart enthusiasts

## Why This Product

- Trusted buildmart brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Last:** Premium galvanized aluminum with foam insulation ensures durability and optimal thermal performance.
- • **Versatile Fit:** Designed for 12" linear slot diffusers with a 6" flex duct entry, perfect for both supply and return airflows.
- • **Customizable & Ready:** Available in multiple sizes and colors (paintable!), shipped fast to upgrade your HVAC style instantly.
- • **Sleek Modern Retrofit:** Transforms traditional vents into minimalist linear slot diffusers for a hotel-chic vibe.
- • **Effortless Installation:** Hidden pre-drilled holes let you mount with a drill and extension—no visible screws, no aesthetic compromise.

## Overview

The BUILDMART 12" Plenum Box is a premium insulated galvanized sheet metal component designed specifically for 12" linear slot diffusers. Featuring a patent-pending design with hidden screw installation, it offers a sleek retrofit solution that replaces traditional vent covers with a modern, minimalist aesthetic. Its foam insulation enhances thermal efficiency, while the durable aluminum construction ensures long-lasting performance. Compatible with 6" flex duct entries, this plenum box is ideal for both supply and return air applications in residential or commercial HVAC systems.

## Description

BUILDMART - 12" Plenum Box for [12" Linear Slot Diffuser - (1 Slot) Single Slot] Premium Insulated Galvanized Sheet Metal Plenum Box for Heating and Cooling - Texas Buildmart - desertcart.com

Review: Solid product that a duct won't fit on. - 6" round duct more like 5x7. Hole was hacked out that way. Quality control isn't much of a concern. Bad day in Guangdong.
Review: Fits Well, but Entry Size Misleading - Fits in the small space available, but connecting the supply duct was a problem. This listing says 6" entry, but 6" supply duct (flex) will not fit (too small). Going to spend more money to purchase an adaptor (6" to 8") to see if that works. This whole thing has cost >$170. so far (incl. diffuser).

## Features

- Ideal for Texas Buildmart 12" 1 Slot Lineal Slot Diffuser
- Galvanized sheet metal Plenum Box with foam insulation.
- Total Box Dimensions: L: 13 3/16" W: 2 7/8" H: 11 7/8"
- Entry size: 1 entry of 6" flex in oval shape
- *This is a design and utility patent pending product* We make sizes from 12" to 72" linear slot diffuser ac vent covers for the modern day home
- We have over 70 standard vent cover sizes to replace your traditional looking grills. We also have over 40 linear slot diffuser sizes with their matching plenum box. All models are in stock ready to ship in both white and black colors – Our models are also paintable.
- All vent cover sizes can be used as both supply and return grilles. Currently our decorative air vent covers are non-filtered models. This will work perfectly if you have your filter in the machine.
- A standard linear slot diffuser is a modern looking decorative air vent cover that fits on a traditional air exit and replaces the traditional looking grills. They have a beautiful linear slot diffuser; they are easy to replace since it is retrofit to the traditional vent cover sizes. Enjoy the incredible looks, the durability since it is 100% aluminum, and they are also very easy to clean. A linear slot diffuser is a linear air exit or vent cover with a long linear look that you usually find in hotels and modern houses. The standard linear slot diffusers and the linear slot diffusers can both be used for remodels and new construction.
- The size that you need to know to buy this vent cover, or any other vent cover is by measuring the air duct opening (the plenum box opening) and not the face size or the vent cover. We recommend you remove the old air vent cover and measure the size of the air duct opening. You do not need to take into consideration the face size of the vent cover. The important measurement is the interior duct opening size. Example: A traditional vent cover size can have a face size of 14x8, and neck of a little less than a 12x6. Your air duct opening should measure 12x6, so you purchase a 12x6. Vent cover dimensions are categorized by the neck and not by the face of the air vent cover.
- The method of installation of our modern air ac vent cover is hidden through the pre-drilled holes inside of the diffuser, which can be accessed by opening the dampers and using a drill with a six-inch extension to screw it into place. Please find attached our instructional videos. This way we avoid having a front drill screw and ruin the esthetics of the product.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09K5XH4Q1 |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #322,282 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1,708 in Registers, Grilles & Vents |
| Color | Silver |
| Customer Reviews | 4.3 4.3 out of 5 stars (7) |
| Date First Available | October 23, 2021 |
| Finish | Finished |
| Head Style | Philips |
| Installation Method | Screw-In |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 4.13 pounds |
| Item model number | 12x1SxPL |
| Manufacturer | Texas Buildmart |
| Material | Aluminum |
| Measurement System | English/Standard |
| Mounting Type | Screw-In |
| Number Of Pieces | 1 |
| Part Number | 12x1SxPL |
| Product Dimensions | 14 x 3 x 12 inches |
| Special Features | Easy to Install |

## Images

![BUILDMART - 12" Plenum Box for [12" Linear Slot Diffuser - (1 Slot) Single Slot] Premium Insulated Galvanized Sheet Metal Plenum Box for Heating and Cooling - Texas Buildmart - Image 1](https://m.media-amazon.com/images/I/61kQEnse8rL.jpg)

## Questions & Answers

**Q: What does a Linear Slot Diffuser do? What are Linear Slot Diffusers used for? What is a Slot Diffuser?**
A: Linear Slot Diffusers are Vent Covers that are Linear and the “face” of a vent. The Air Conditioning unit distributes air throughout the home/building via the air duct tubing and delivers hot/cold air to each room that the vent is in.

**Q: Are Linear Slot Diffusers good?**
A: Linear Slot Diffusers are the “face” of the vent, often referred to as a Vent Cover. Linear Slot Diffusers are good in the sense that they are aesthetically pleasing to look at and give a modern feel to any room they are in.

**Q: How do I choose a Linear Slot Diffuser?**
A: For New Builds, we always recommend checking with your HVAC Contractor to confirm the CFM’s each room will need and then selecting your Linear Slot Diffusers based on the CFM’s

**Q: What sizes do vent covers come in? What is the standard vent cover size?**
A: Vent Covers, Grilles, Registers, Diffusers come in different sizes. The most Standard Sizes being 10” x 6” and 12” x 6” and 8” x 4” - You will find at least one of these in most homes.

## Customer Reviews

### ⭐⭐ Solid product that a duct won't fit on.
*by A***X on August 10, 2023*

6" round duct more like 5x7. Hole was hacked out that way. Quality control isn't much of a concern. Bad day in Guangdong.

### ⭐⭐⭐ Fits Well, but Entry Size Misleading
*by F***R on December 7, 2021*

Fits in the small space available, but connecting the supply duct was a problem. This listing says 6" entry, but 6" supply duct (flex) will not fit (too small). Going to spend more money to purchase an adaptor (6" to 8") to see if that works. This whole thing has cost >$170. so far (incl. diffuser).

## Frequently Bought Together

- BUILDMART - 12" Plenum Box for [12" Linear Slot Diffuser - (1 Slot) Single Slot] Premium Insulated Galvanized Sheet Metal Plenum Box for Heating and Cooling - Texas Buildmart
- BUILDMART - 12" Linear Slot Diffuser - (1 Slot) Single Slot - White Decorative Air Vent - Modern AC Vent Cover for Ceiling, Walls & Floors - Texas Buildmart
- BUILDMART - 12" Linear Slot Diffuser - (1 Slot) Single Slot - Black Decorative Aluminum Air Vent - Heating and Cooling Modern AC Vent Cover for Ceiling, Walls & Floors - Texas Buildmart

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*Product available on Desertcart Nicaragua*
*Store origin: NI*
*Last updated: 2026-02-21*