---
product_id: 40182712
title: "306MGR Foundation"
brand: "witten automatic vent"
price: "₩98908"
currency: KRW
in_stock: true
reviews_count: 8
category: "Witten Automatic Vent"
url: https://www.desertcart.kr/products/40182712-306mgr-foundation
store_origin: KR
region: South Korea
---

# Adjustable stainless spring Auto temp control 40°-70°F Corrosion-resistant build 306MGR Foundation

**Brand:** witten automatic vent
**Price:** ₩98908
**Availability:** ✅ In Stock

## Summary

> 🌬️ Upgrade your foundation vent game—smart, sleek, and stress-free!

## Quick Answers

- **What is this?** 306MGR Foundation by witten automatic vent
- **How much does it cost?** ₩98908 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/40182712-306mgr-foundation)

## Best For

- witten automatic vent enthusiasts

## Why This Product

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

## Key Features

- • **Built to Last:** Heavy-duty aluminum mesh and high-density thermoplastic resist wear and weather.
- • **Universal Fit:** Designed to replace old vents, fits standard 8x16 inch openings seamlessly.
- • **Durable & Low Maintenance:** Stainless steel spring and corrosion-resistant parts ensure long-lasting performance.
- • **Quick & Easy Installation:** Single adjustable screw setup saves time, even for multiple units.
- • **Effortless Climate Control:** Automatically opens at 70°F and closes at 40°F—no manual hassle.

## Overview

The Witten Automatic Vent 306MGR Foundation replaces outdated manual vents with a smart, self-regulating system that opens at 70°F and closes at 40°F. Built with corrosion-resistant metals, a stainless steel spring, and heavy-duty aluminum mesh, it fits standard 8x16 inch openings and installs quickly with one adjustable screw. Ideal for professionals seeking durable, low-maintenance ventilation solutions that blend efficiency with ease.

## Description

Product Description Replaces old-style manual vents. Fits standard 8 in x 16 in vent openings. Automatically opens at 70 deg F and closes at 40 (approximately). The key mechanism, bi-metal coil, fully enclosed in protective cover. Stainless steel compression spring with 1 adjustable screw for easy installation. 65 sq-in net-free area. High-density thermo-plastic construction. Stainless steel and corrosion-resistant metal parts. Heavy-duty aluminum mesh screen, front and back. No electrical hook-up required. 8 in x 16 in. From the Manufacturer Witten Automatic Vent Grey Found Auto Vent B-E 306MGR

Review: Bang for your buck! - I bought two different products due to quantities needed and the availability. Of the two, this one was a bit more money, but totally worth it. The quality was just so much more superior than the other. Installation is a little time consuming when installing 12 of these, but each one was about 5-7 minutes to install. Automatic part works well. I have 5 of these under my deck, so to get to them to change them would be a pain. Automatic are the way to go.
Review: Great replacements for an older foundation! - These are amazing! I replaced what looked like the original vents that were put in 60 years ago. None of them had the same size opening in the foundation but we were able to replace them all with a little creativity. Installation would have been easy peasy if not for the foundation inconsistencies. It turned off cold this week and they all closed automatically, so now I won't have to go out with the hammer next spring and beat them open. I definitely recommend these.

## Features

- Replaces old-style manual vents
- Fits standard 8 X 16 in vent opening
- Automatically opens at 70 deg F and closes at 40 deg F (approximately)
- The key mechanism, bi-metal coil, fully enclosed in protective cover
- Stainless steel compression spring with 1 adjustable screw for easy installation

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN  | B000DZF2X2 |
| Customer Reviews | 4.1 4.1 out of 5 stars (181) |
| Is Discontinued By Manufacturer  | No |
| Item model number  | 306MGR |
| Manufacturer  | WITTEN AUTOMATIC VENT |
| Product Dimensions  | 14.25 x 19 x 31.13 inches; 1 Pounds |
| UPC  | 008661306035 |

## Product Details

- **Brand:** WITTEN AUTOMATIC VENT
- **Color:** Grey
- **Controller Type:** Button Control
- **Electric fan design:** Exhaust Fan
- **Mounting Type:** Wall Mount
- **Power Source:** manual
- **Product Dimensions:** 14.25"D x 19"W x 31.13"H
- **Recommended Uses For Product:** Exhausting
- **Special Feature:** special_feature
- **Style:** Modern

## Images

![306MGR Foundation - Image 1](https://m.media-amazon.com/images/I/818vbU8iswL.jpg)

## Questions & Answers

**Q: Is this product manufactured in USA**
A: Mine are grey

**Q: Anyone used them in a coastal enviroment?  Salt air conditions?**
A: I am using them near the shore in New Jersey. However, we only installed them last fall. Not long enough to know if they will holdup. At this price I would give it a try.

**Q: Does this vent take power?**
A: No, not powered vents.  There is a thermostatic spring that opens vents above a certain temp and closes them below a certain temp.  We have had these for several years and i think 1 out of the 12 is a little slow to open/close.  Fairly nice quality, heavy plastic... however, we have a problem with 1 vent staying in when it is windy.  It is difficult to get them set well with the un-eveness of a brick foundation.

**Q: Will this open/close correctly if installed in a ceiling? (i.e. Media Closet vent to attic)**
A: I would think so. Issues could be impingement with what is on the other side in the ceiling and how it is mounted.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Bang for your buck!
*by D***Y on January 25, 2024*

I bought two different products due to quantities needed and the availability. Of the two, this one was a bit more money, but totally worth it. The quality was just so much more superior than the other. Installation is a little time consuming when installing 12 of these, but each one was about 5-7 minutes to install. Automatic part works well. I have 5 of these under my deck, so to get to them to change them would be a pain. Automatic are the way to go.

### ⭐⭐⭐⭐⭐ Great replacements for an older foundation!
*by A***R on November 11, 2018*

These are amazing! I replaced what looked like the original vents that were put in 60 years ago. None of them had the same size opening in the foundation but we were able to replace them all with a little creativity. Installation would have been easy peasy if not for the foundation inconsistencies. It turned off cold this week and they all closed automatically, so now I won't have to go out with the hammer next spring and beat them open. I definitely recommend these.

### ⭐⭐⭐⭐⭐ Great vents
*by W***N on October 2, 2022*

Great vents with thermostatic louvers to close them when winter comes. Once the block is removed, not always easy, they are easy to install.

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**Shop now:** [https://www.desertcart.kr/products/40182712-306mgr-foundation](https://www.desertcart.kr/products/40182712-306mgr-foundation)

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-03-10*