---
product_id: 743331801
title: "BIOWIND Quiet Register Booster Fan Fits 4\" x 12\" Register Holes, 10-Speed Smart Heating Cooling AC Vent Fan with Remote Control and Thermostat Control - Black"
brand: "biowind"
price: "€ 202.89"
currency: EUR
in_stock: true
reviews_count: 5
category: "Biowind"
url: https://www.desertcart.hr/products/743331801-biowind-quiet-register-booster-fan-fits-4-x-12-register
store_origin: HR
region: Croatia
---

# Ultra-quiet 18 dBA noise 120 CFM airflow 10-speed remote control BIOWIND Quiet Register Booster Fan Fits 4" x 12" Register Holes, 10-Speed Smart Heating Cooling AC Vent Fan with Remote Control and Thermostat Control - Black

**Brand:** biowind
**Price:** € 202.89
**Availability:** ✅ In Stock

## Summary

> 🌬️ Elevate your comfort game with silent, smart airflow innovation!

## Quick Answers

- **What is this?** BIOWIND Quiet Register Booster Fan Fits 4" x 12" Register Holes, 10-Speed Smart Heating Cooling AC Vent Fan with Remote Control and Thermostat Control - Black by biowind
- **How much does it cost?** € 202.89 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/743331801-biowind-quiet-register-booster-fan-fits-4-x-12-register)

## Best For

- biowind enthusiasts

## Why This Product

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

## Key Features

- • **Customizable Airflow:** 10-speed fan settings via remote for perfect comfort and energy savings.
- • **Smart Climate Control:** Automatically balances room temperature with precision thermostat sensor.
- • **Whisper-Quiet Comfort:** Operates at just 18 dBA, so you barely notice it’s working.
- • **Energy-Smart Efficiency:** Maximizes HVAC output while reducing energy costs—comfort meets savings.
- • **Plug & Play Installation:** Compact design fits standard 4"x12" vents, easy to install without hassle.

## Overview

The BIOWIND Quiet Register Booster Fan is a sleek, energy-efficient solution designed to enhance HVAC airflow through standard 4"x12" vents. Featuring a powerful 120 CFM airflow, ultra-quiet 18 dBA operation, and a 10-speed remote-controlled fan with thermostat integration, it smartly balances room temperatures while saving energy. Easy to install and perfect for millennial professionals seeking modern comfort and cost-effective climate control.

## Description

BIOWIND Quiet Register Booster Fan, Smart Register Vent Fits 4" x 12" Register Holes with Remote Control and Thermostat Control, Heating Cooling AC Vent Fan - Black

Review: Ok product - It's ok, doesnt have as much power as we were hoping. We will see in the summer of it does what we want it to do.
Review: This works, and I need to order some more for other rooms - I have an upstairs that runs too warm all summer. It's big room with one vent fed by at least a 15 foot run of 12" duct. I had been planning to sever the duct and install an inline duct fan up in the attic and either use an expensive pressure switch or tap into the thermostat wire with a relay, but this vent register booster is a much easier to install and less expensive solution - and it's working pretty well! Plugging it in is the only tricky part, but I was able to plug it in up in the attic so no cord is visible. I took my old vent register off and I probed around the edges with one of those wiring fishing rods until I found a gap where the rod could push up into the attic. Then I climbed up in the attic, plugged it into an outlet up there and then taped the end of the cord to the rod so I could pull it back down into the room. The AC register booster has a short 6 inch lead attached to it, and the rest of the wire connects to that. It's obviously heavier than a plain vent register, so it was bit difficult to install because I had to use both hands to hold the register up there and connect the wire and then reach for the screw and screwdriver to fasten it in place without letting go of anything. The thermostat measures the air in the duct so that you can set it a temperature below the normal room temperature, but above the temperature you're reading in the vent when the AC is on and it will turn the fans on only once the cold air starts coming through. Mine started off reading 68ºF in the duct, but after a while I checked it again and the reading was 66º, so I figure it's pulling the cool air through the duct faster and not allowing it to heat up in that long duct in the attic. I still need to replace my AC system, but I can tell that this room is noticeably more comfortable after installing this inexpensive solution first.

## Features

- Quiet Register Booster Fan: A quiet fan system designed for improving wall and floor vents airflow from HVAC systems to increase home comfort.
- Eliminate Uneven Room Temperatures: Biowind smart register vent equipped with programmable LED controller and high-precision temp sensor to work with HVAC. It can automatically turn on/off vent fan to heat or cool the rooms at the right time.
- New Upgraded Remote Control: Remotely adjust the fan speed(0-10 level）to meet user different needs and make a perfect balance between noise and comfort. No need to get up, More convenient.
- Energy-Saving & Cost-Effective: This vent booster fans are more energy-efficient to traditional AC and cooling devices. They rely on airflow to improve indoor temperature and circulation, maximize the heating or cooling from your HVAC system with minimum energy. Besides, This smart register vent continues running after HVAC system off, pulling every bit of heat or cold air into your home. Help you save more energy & electricity costs.
- Compact & Easy to Install: Biowind smart register booster fan is small in size and easy to move or install,making them convenient to use. Fits ONLY 4" x 12" Register Vent| Rated power: 6W | AC Input: 100 to 240 VAC| Airflow: 120 CFM | Noise: 18 Dba | Includes Wall Adapter, plug and play.
- Affordable: Compared to large-scale air conditioning and cooling devices, booster fans are relatively inexpensive and affordable, making them accessible to ordinary households.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0D1G1GD5P |
| Air Flow Capacity | 120 Cubic Feet Per Minute |
| Blade Material | Plastic |
| Brand | BIOWIND |
| Brand Name | BIOWIND |
| Color | Black 4" x 12" |
| Colour | Black 4" x 12" |
| Control Method | Remote |
| Controller Type | Remote Control |
| Customer Reviews | 4.2 out of 5 stars 1,155 Reviews |
| Electric Fan Design | Exhaust Fan |
| Electric fan design | Exhaust Fan |
| Finish Type | Black |
| Included Components | Cord |
| Indoor Outdoor Usage | Indoor |
| Installation Type | Insertion |
| Is Electric | Yes |
| Is Product Cordless | No |
| Item Dimensions D x W x H | 5D x 14W x 35H centimeters |
| Item Type Name | register booster fan |
| Material | Aluminum |
| Model Name | AirBoost T4 |
| Model Number | AirBoost T4 |
| Mounting Type | Floor Mount |
| Noise Level | 16 Decibels |
| Number of Blades | 7 |
| Number of Power Levels | 3 |
| Number of Speeds | 10 |
| Power Source | Corded Electric |
| Power source | Corded Electric |
| Product dimensions | 5D x 14W x 35H centimeters |
| Recommended Uses For Product | Indoor |
| Room Type | Kids Room |
| Size | 4" x 12" |
| Special Features | Remote Controlled |
| Speed | 120 Cubic Feet Per Minute |
| Standby Power Shutoff | High Efficiency |
| Style | Modern |
| Theme | Modern |
| Unit Count | 1.0 Count |
| Wattage | 6 watts |

## Product Details

- **Brand:** BIOWIND
- **Colour:** Black 4" x 12"
- **Electric fan design:** Exhaust Fan
- **Power source:** Corded Electric
- **Style:** Modern
- **Product dimensions:** 5D x 14W x 35H centimeters
- **Room type:** Kids Room
- **Special features:** Remote Controlled
- **Recommended uses for product:** Indoor
- **Mounting type:** Floor Mount

## Images

![BIOWIND Quiet Register Booster Fan Fits 4" x 12" Register Holes, 10-Speed Smart Heating Cooling AC Vent Fan with Remote Control and Thermostat Control - Black - Image 1](https://m.media-amazon.com/images/I/71jKCLYGoCL.jpg)
![BIOWIND Quiet Register Booster Fan Fits 4" x 12" Register Holes, 10-Speed Smart Heating Cooling AC Vent Fan with Remote Control and Thermostat Control - Black - Image 2](https://m.media-amazon.com/images/I/713HHLABg-L.jpg)
![BIOWIND Quiet Register Booster Fan Fits 4" x 12" Register Holes, 10-Speed Smart Heating Cooling AC Vent Fan with Remote Control and Thermostat Control - Black - Image 3](https://m.media-amazon.com/images/I/61vLzuDHfxL.jpg)
![BIOWIND Quiet Register Booster Fan Fits 4" x 12" Register Holes, 10-Speed Smart Heating Cooling AC Vent Fan with Remote Control and Thermostat Control - Black - Image 4](https://m.media-amazon.com/images/I/61l69XfvEZL.jpg)
![BIOWIND Quiet Register Booster Fan Fits 4" x 12" Register Holes, 10-Speed Smart Heating Cooling AC Vent Fan with Remote Control and Thermostat Control - Black - Image 5](https://m.media-amazon.com/images/I/61DNMtTcn8L.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐ Ok product
*by S***E on 4 January 2026*

It's ok, doesnt have as much power as we were hoping. We will see in the summer of it does what we want it to do.

### ⭐⭐⭐⭐⭐ This works, and I need to order some more for other rooms
*by J***W on 15 May 2025*

I have an upstairs that runs too warm all summer. It's big room with one vent fed by at least a 15 foot run of 12" duct. I had been planning to sever the duct and install an inline duct fan up in the attic and either use an expensive pressure switch or tap into the thermostat wire with a relay, but this vent register booster is a much easier to install and less expensive solution - and it's working pretty well! Plugging it in is the only tricky part, but I was able to plug it in up in the attic so no cord is visible. I took my old vent register off and I probed around the edges with one of those wiring fishing rods until I found a gap where the rod could push up into the attic. Then I climbed up in the attic, plugged it into an outlet up there and then taped the end of the cord to the rod so I could pull it back down into the room. The AC register booster has a short 6 inch lead attached to it, and the rest of the wire connects to that. It's obviously heavier than a plain vent register, so it was bit difficult to install because I had to use both hands to hold the register up there and connect the wire and then reach for the screw and screwdriver to fasten it in place without letting go of anything. The thermostat measures the air in the duct so that you can set it a temperature below the normal room temperature, but above the temperature you're reading in the vent when the AC is on and it will turn the fans on only once the cold air starts coming through. Mine started off reading 68ºF in the duct, but after a while I checked it again and the reading was 66º, so I figure it's pulling the cool air through the duct faster and not allowing it to heat up in that long duct in the attic. I still need to replace my AC system, but I can tell that this room is noticeably more comfortable after installing this inexpensive solution first.

### ⭐⭐⭐⭐⭐ Great Device
*by D***N on 22 June 2025*

No more expensive portable room air conditioners that last less than 5 years!! These work to cool living areas: kitchen in the mornings, bedroom at night. Can't say they are 'quiet' when fan is set to high (8-10), but it's not invasive, more like airplane engine noise at cruise altitude (white noise actually puts most people to sleep, the reason so many people take a flying nap). Settings are simple to make and so far, no problem with digital panel working as expected. Important Note: these plug into electrical outlet, so carefully consider whether they can plug in near your target register vents. Elec cord is reasonably long. I've only used these for one month (summer) with central ac cooling, so can't speak to longevity, but with my bdrm door closed for an hour before bedtime, they bring temperature down abt 10 degrees (with ac running, then I turn central hvac off at bedtime, bdrm stays cool all night). Colder rooms help with getting to sleep. One more thing. These vent units measure the air temp blowing from the vent, not the room temperature. You select the vent temp -- for summer mine is set to come on when vented air is below 70; next winter over 80. Note: an issue arises when trying to set both at same time (not a flaw, issue is covered in instructions), simple to set it once per season.

## Frequently Bought Together

- BIOWIND Quiet Register Booster Fan, Smart Register Vent Fits 4" x 12" Register Holes with Remote Control and Thermostat Control, Heating Cooling AC Vent Fan - Black
- Decor Grates AJH412-BLK Oriental Floor Register, 4x12 Inches, Textured Black

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**Shop now:** [https://www.desertcart.hr/products/743331801-biowind-quiet-register-booster-fan-fits-4-x-12-register](https://www.desertcart.hr/products/743331801-biowind-quiet-register-booster-fan-fits-4-x-12-register)

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-07-08*