---
product_id: 419306596
title: "BUILDMART - 36\" Plenum Box for [36\" Linear Slot Diffuser - (1 Slot) Single Slot] Premium Insulated Galvanized Sheet Metal Plenum Box for Heating and Cooling - Texas Buildmart"
brand: "buildmart"
price: "€ 463.58"
currency: EUR
in_stock: true
reviews_count: 1
category: "Buildmart"
url: https://www.desertcart.be/products/419306596-buildmart-36-plenum-box-for-36-linear-slot-diffuser-1
store_origin: BE
region: Belgium
---

# 36.7" length precision fit Foam insulated galvanized metal Screw-in hidden installation BUILDMART - 36" Plenum Box for [36" Linear Slot Diffuser - (1 Slot) Single Slot] Premium Insulated Galvanized Sheet Metal Plenum Box for Heating and Cooling - Texas Buildmart

**Brand:** buildmart
**Price:** € 463.58
**Availability:** ✅ In Stock

## Summary

> 🏢 Elevate your airflow game with BUILDMART’s sleek, insulated plenum box!

## Quick Answers

- **What is this?** BUILDMART - 36" Plenum Box for [36" 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?** € 463.58 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/419306596-buildmart-36-plenum-box-for-36-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

- • **Custom Fit Confidence:** Designed for exact 10" oval flex duct entry and retrofit-ready for traditional duct openings.
- • **Seamless Modern Upgrade:** Replace outdated grills with sleek 36" linear slot diffuser plenum box for a hotel-chic vibe.
- • **Built to Last & Insulate:** Premium galvanized sheet metal with foam insulation ensures durability and optimal HVAC efficiency.
- • **Ready to Ship & Paintable:** In-stock, available in white or black, and fully paintable to match your modern interior style.
- • **Effortless, Invisible Installation:** Hidden pre-drilled holes allow a clean, screw-in setup—no visible screws ruining your aesthetic.

## Overview

The BUILDMART 36" Plenum Box is a premium insulated galvanized sheet metal component designed specifically for 36" single slot linear slot diffusers. Engineered for easy retrofit installation with hidden screw holes, it fits a 10" oval flex duct entry and offers superior durability and insulation. Available in multiple sizes and colors, this product modernizes HVAC vent aesthetics while enhancing system efficiency.

## Description

BUILDMART - 36" Plenum Box for [36" Linear Slot Diffuser - (1 Slot) Single Slot] Premium Insulated Galvanized Sheet Metal Plenum Box for Heating and Cooling - Texas Buildmart - desertcart.com

Review: Corners bent - Great quality in materials but might be in shipping that the corners all bent in.

## Features

- Ideal for Texas Buildmart 36" 1 Slot Lineal Slot Diffuser
- Galvanized sheet metal Plenum Box with foam insulation.
- Total Box Dimensions: L: 36 7/8" W: 3" H: 12"
- Entry size: 1 entry of 10" 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 | B09K5XQPHL |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #286,949 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1,499 in Registers, Grilles & Vents |
| Color | Silver |
| Customer Reviews | 4.3 4.3 out of 5 stars (4) |
| 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 | 9.83 pounds |
| Item model number | PLB--36- |
| Manufacturer | Texas Buildmart |
| Material | Metal |
| Measurement System | English/Standard |
| Mounting Type | Screw-In |
| Number Of Pieces | 1 |
| Product Dimensions | 37 x 3 x 12 inches |
| Special Features | Easy to Install |

## Images

![BUILDMART - 36" Plenum Box for [36" 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/515ir33qujL.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

### ⭐⭐⭐ Corners bent
*by V***E on August 21, 2024*

Great quality in materials but might be in shipping that the corners all bent in.

## Frequently Bought Together

- BUILDMART - 36" Plenum Box for [36" Linear Slot Diffuser - (1 Slot) Single Slot] Premium Insulated Galvanized Sheet Metal Plenum Box for Heating and Cooling - Texas Buildmart
- BUILDMART - 36" Linear Slot Diffuser - (1 Slot) Single Slot - White Decorative Air Vent - Modern AC Vent Cover for Ceiling, Walls & Floors - Texas Buildmart
- BUILDMART - 36" Linear Slot Diffuser - (1 Slot) Single Slot - Black Decorative Air Vent - Modern AC Vent Cover for Ceiling, Walls & Floors - Texas Buildmart

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*Product available on Desertcart Belgium*
*Store origin: BE*
*Last updated: 2026-05-04*