---
product_id: 78859565
title: "RKKI Backdraft Shutter 4 inch Inline Extractor Fan Backdraft Shutter Self Closing, Weather/UV Resistant Plastic, 100mm"
brand: "calimaero"
price: "€ 24.62"
currency: EUR
in_stock: true
reviews_count: 13
category: "Calimaero"
url: https://www.desertcart.it/products/78859565-rkki-backdraft-shutter-4-inch-inline-extractor-fan-backdraft-shutter
store_origin: IT
region: Italy
---

# 100mm blade size for optimal airflow Self-closing flaps prevent backdrafts UV & weather resistant plastic RKKI Backdraft Shutter 4 inch Inline Extractor Fan Backdraft Shutter Self Closing, Weather/UV Resistant Plastic, 100mm

**Brand:** calimaero
**Price:** € 24.62
**Availability:** ✅ In Stock

## Summary

> 🛠️ Upgrade your airflow game — keep the breeze out and the comfort in!

## Quick Answers

- **What is this?** RKKI Backdraft Shutter 4 inch Inline Extractor Fan Backdraft Shutter Self Closing, Weather/UV Resistant Plastic, 100mm by calimaero
- **How much does it cost?** € 24.62 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/78859565-rkki-backdraft-shutter-4-inch-inline-extractor-fan-backdraft-shutter)

## Best For

- calimaero enthusiasts

## Why This Product

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

## Key Features

- • **Trusted Expertise:** Backed by 40+ years of ventilation know-how and responsive customer support.
- • **Seamless Inline Fit:** Pushes directly into exhaust pipes for quick, hassle-free installation and retrofitting.
- • **Smart Airflow Control:** Automatically opens with exhaust flow and closes tightly to block cold air and backdrafts.
- • **Weatherproof Durability:** Crafted from UV-resistant plastic to withstand outdoor elements and maintain performance year-round.
- • **Universal HVAC Compatibility:** Perfect for bathroom fans, cooker hoods, tumble dryers, and all ventilation systems.

## Overview

The RKKI Backdraft Shutter is a 100mm inline extractor fan accessory designed to prevent backdrafts by automatically closing its flaps when airflow stops. Made from weatherproof and UV-resistant plastic, it fits snugly inside exhaust pipes and is compatible with a wide range of HVAC systems including bathroom fans and cooker hoods. Easy to install and backed by over four decades of ventilation expertise, it ensures efficient airflow control and energy savings.

## Description

Great prices on your favourite Home brands, and free delivery on eligible orders.

Review: Inline backdraft vent shutter - Reading other reviews, this is an INLINE vent, not an outside vent, needs to go inside the vent tube. I added some green tape to fill the gap between the blades and the edge of the vent frame. I took off the vent tube from the extractor, installed the backdraft shutter, placed vent tube back.
Review: Works well to prevent backdraughts, but clatters in windy conditions - I fitted this backdraft shutter to my kitchen extractor to prevent cold air from blowing back into the kitchen from outside. Unlike some other reviewers, I found mine fitted snugly into the fan exhaust adaptor (it must be a different size of fitting?) & I also applied some PVC tape around the join. This arrangement works very well, and you can hear the faint but reassuring sound of the shutter closing after turning off the extractor. However, it does clatter on windy days, and I've taken a star off for this! I'm not sure what the solution is- I've tried different types of shutter, both at the fan exhaust end and at the outlet end, but all of these options still clatter when it's windy! I also tried putting some thin strips of self-adhesive rubber foam along the mating surfaces of the valve, and this does deaden the sound to some extent, but it's still there...

## Features

- PRODUCT FEATURES calimaero RKKI works well in square meter 95mm. Use sealing tape or sealing band for a tight fit on hoses and vents. This well-made backdraught plastic is weatherproof and UV resistant. It prevents the exhaust air from flowing back and cold air from flowing in. The flaps automatically open when the fan blows out the exhaust air and closes when the air flow stops.
- INSTALLATION The backdraft shutter is pushed completely into the exhaust pipe. Easy to install and perfect for retrofitting bathroom fans and ventilation systems without a back draft shutter. The flaps must be aligned horizontally in order to close optimally.
- VERSATILE USE No need to buy multiple products to find the one that works. Applicable in all supply and exhaust air systems, such as air conditioning systems, tumble dryers, extractor fan, cooker hood and other HVAC applications.
- PERFORMANCE Ideal choice for improving any ducting system without a backdraft shutter. The smooth-running flaps can also be opened by small fans. It does the job and works great for your home improvement.
- CUSTOMER SERVICE We are experts in ventilation for more than 40 years. If you have any questions or complaints, please contact our customer service directly. Your request will be processed immediately.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07F6F8H7M |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 31,613 in DIY & Tools ( See Top 100 in DIY & Tools ) 117 in Registers, Grilles & Vents |
| Blade length | 100 Millimetres |
| Certification | DIN EN 1506 |
| Colour | White |
| Customer Reviews | 3.8 3.8 out of 5 stars (565) |
| Date First Available | 1 July 2018 |
| Finish | Powder Coated |
| Installation method | inline |
| Item Package Quantity | 1 |
| Item Weight | 20 g |
| Item model number | RKKI 100 |
| Manufacturer | calimaero |
| Number of Pieces | 1 |
| Part Number | RKKI-4 |
| Power Source | Electric |
| Product Dimensions | 9.5 x 9.5 x 0.71 cm; 20 g |
| Size | 100 mm |
| Special Features | No |
| Speed | 1 RPM |
| Style | Industrial |
| Switch style | On/Off |
| Wattage | 20 watts |

## Product Details

- **Brand:** calimaero
- **Colour:** White
- **Electric fan design:** Exhaust Fan
- **Mounting type:** Slide-on/Screw-on
- **Power source:** Electric
- **Product dimensions:** 9.5D x 9.5W x 0.7H centimetres
- **Recommended uses for product:** Ventilating
- **Room type:** Bathroom
- **Special feature:** No
- **Style:** Industrial

## Images

![RKKI Backdraft Shutter 4 inch Inline Extractor Fan Backdraft Shutter Self Closing, Weather/UV Resistant Plastic, 100mm - Image 1](https://m.media-amazon.com/images/I/31Cw+ZmvuXL.jpg)
![RKKI Backdraft Shutter 4 inch Inline Extractor Fan Backdraft Shutter Self Closing, Weather/UV Resistant Plastic, 100mm - Image 2](https://m.media-amazon.com/images/I/31eqaF9rreL.jpg)
![RKKI Backdraft Shutter 4 inch Inline Extractor Fan Backdraft Shutter Self Closing, Weather/UV Resistant Plastic, 100mm - Image 3](https://m.media-amazon.com/images/I/41-Tj7z7FcL.jpg)
![RKKI Backdraft Shutter 4 inch Inline Extractor Fan Backdraft Shutter Self Closing, Weather/UV Resistant Plastic, 100mm - Image 4](https://m.media-amazon.com/images/I/413c-QkcnfL.jpg)
![RKKI Backdraft Shutter 4 inch Inline Extractor Fan Backdraft Shutter Self Closing, Weather/UV Resistant Plastic, 100mm - Image 5](https://m.media-amazon.com/images/I/41GNamfGzRL.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Inline backdraft vent shutter
*by D***D on 6 January 2026*

Reading other reviews, this is an INLINE vent, not an outside vent, needs to go inside the vent tube. I added some green tape to fill the gap between the blades and the edge of the vent frame. I took off the vent tube from the extractor, installed the backdraft shutter, placed vent tube back.

### ⭐⭐⭐⭐ Works well to prevent backdraughts, but clatters in windy conditions
*by J***6 on 7 April 2022*

I fitted this backdraft shutter to my kitchen extractor to prevent cold air from blowing back into the kitchen from outside. Unlike some other reviewers, I found mine fitted snugly into the fan exhaust adaptor (it must be a different size of fitting?) & I also applied some PVC tape around the join. This arrangement works very well, and you can hear the faint but reassuring sound of the shutter closing after turning off the extractor. However, it does clatter on windy days, and I've taken a star off for this! I'm not sure what the solution is- I've tried different types of shutter, both at the fan exhaust end and at the outlet end, but all of these options still clatter when it's windy! I also tried putting some thin strips of self-adhesive rubber foam along the mating surfaces of the valve, and this does deaden the sound to some extent, but it's still there...

### ⭐⭐⭐⭐⭐ advice on installation!
*by G***S on 22 September 2024*

This thing works well, I think a few people have missed the main feature - it fits INSIDE a round 100mm vent duct/pipe. Its deliberately designed to be a loose fit so get some foam draft excluder tape (5mm max thickness) and put it around the outside. That will create a nice snug fit, just push the shutter gently into the pipe. Switch on the extractor and check its in the right way round - job sorted.

## Frequently Bought Together

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*Product available on Desertcart Italy*
*Store origin: IT*
*Last updated: 2026-02-20*