---
product_id: 73757805
title: "QT100HT Humidity Extractor Fan, 25 l/s, 100mm Duct | German Made, QuietMark Certified 25 dB, Adjustable Humidity, Timer Overrun and Delay Start, 2-Speed 5W/9W, 3-Year Warranty"
brand: "airflow"
price: "$433.41"
currency: USD
in_stock: true
reviews_count: 12
category: "Airflow"
url: https://www.desertcart.us/products/73757805-qt100ht-humidity-extractor-fan-25-l-s-100mm-duct-german
store_origin: US
region: United States of America
---

# 25 L/s airflow Ultra-quiet 25 dB noise level Adjustable timer & humidity sensor QT100HT Humidity Extractor Fan, 25 l/s, 100mm Duct | German Made, QuietMark Certified 25 dB, Adjustable Humidity, Timer Overrun and Delay Start, 2-Speed 5W/9W, 3-Year Warranty

**Brand:** airflow
**Price:** $433.41
**Availability:** ✅ In Stock

## Summary

> 💨 Quiet power, smart control — breathe better, live smarter.

## Quick Answers

- **What is this?** QT100HT Humidity Extractor Fan, 25 l/s, 100mm Duct | German Made, QuietMark Certified 25 dB, Adjustable Humidity, Timer Overrun and Delay Start, 2-Speed 5W/9W, 3-Year Warranty by airflow
- **How much does it cost?** $433.41 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/73757805-qt100ht-humidity-extractor-fan-25-l-s-100mm-duct-german)

## Best For

- airflow enthusiasts

## Why This Product

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

## Key Features

- • **Energy-Smart Efficiency:** Consumes only 5W/9W with a low specific fan power of 0.24 w/l/s, cutting energy bills and carbon footprint.
- • **Whisper-Quiet Operation:** Certified QuietMark at just 25 dB ensures your bathroom stays peaceful without sacrificing performance.
- • **Durable German Engineering:** Built to last with IP45 water/dust protection and 40,000+ hour ball bearing lifespan, backed by a 3-year warranty.
- • **Tailored Ventilation Control:** Two-speed fan with adjustable humidity sensor (65%-90% RH) and timer settings (6-21 mins) for perfect air quality on demand.
- • **Seamless Installation & Compliance:** Compact 100mm duct size fits standard setups, fully compliant with Building Regulations and safe for wet zones.

## Overview

The Airflow QT100HT Extractor Fan delivers efficient, whisper-quiet ventilation with a powerful 25 L/s airflow. Featuring adjustable humidity sensing and timer controls, it optimizes air quality while minimizing energy use at just 5-9 watts. German-engineered for durability and safety, it operates at a near-silent 25 dB and meets all relevant building regulations, making it the ideal upgrade for modern bathrooms seeking smart, sustainable ventilation.

## Description

From the manufacturer QuietAir Range Airflow Developments Pioneers in Ventilation since 1955. For over 60 years, Airflow has been forging a path of leading innovation in the design and manufacture of ventilation systems and air measuring instruments. The Whisper Quiet Fan QuietAir is a range of extremely quiet, elegant and discreet axial fans with various integral options that only activate when needed. These two speed fans can be controlled by remote switching, timer, humidity timer and motion sensor with timer. The second speed can be activated via an optional remote switch. By using exceptionally low energy, your carbon emissions and energy bills are reduced. The sleek and discrete design means there is no intrusion to your aesthetics. Up to 72 l/sec Integral flow straightener and back draught flap Low power consumption from only 5w. Delay start feature allows you to prevent fan from being activated when using the room for a quick visit. The delay start feature can be adjusted from 45 seconds to 2 minutes (excludes Basic models) The QuietAir fan enables the user to choose between one of two speed options, a low or a high. By using an independent switch, you can alternate between the two speeds. It has a high efficiency impeller for extraction through up to 10 meters of rigid ducting and still able to comply with the Building Regulations The QuietAir Range QuietAir 100 Toilet, Bathroom and En-suite The QuietAir 100mm is the quietest fan available complying with the latest Building Regulations Installed Performance requirements on both speeds, when ducted. The QuietAir 100 carries the Quiet Mark accreditation. 2021 - Quiet Mark Approval QuietAir 120 Toilet, Bathroom, Utility Room and kitchen (adjacent to the hob) The more powerful performing QuietAir 120mm is designed for larger wet rooms to provide extraction levels that exceed the requirements of the latest Building Regulations. The QuietAir 120 has been awarded the Quiet Mark accreditation for the kitchen category. QuietAir 150 Kitchen (Adjacent to the hob) The powerhouse of the range – the QuietAir 150 is ideal for kitchens and larger rooms whilst still achieving a low noise level for its size of only 35dB(A). Variable speed control is available for quick and easy adjustment of the flow rate.

Review: Excellent product - Excellent fan ticks all the boxes easy to fit fixing holes much job today existing duct
Review: Straight swap. - Easy to swap for my old one that die after 16 years. Initially tried smaller one that was quieter but didn't get same air flow suction so I came back to that one, as no window in that bathroom it gets job done perfectly, no steam on mirrors.

## Features

- Two-Speed Extraction: Airflow Bathroom Extractor Fan is equipped with a high-efficiency 100mm axial impeller, offering airflow rates of 75/90 m³/h (21/25 l/s) across two speed settings for tailored ventilation in bathrooms, en-suites, and toilets. 100mm/4” Duct Size.
- Advanced Humidity & Timer Functions: Airflow Bathroom Extractor Fan Features an adjustable humidity sensor (65% - 90% RH) and an adjustable timer with settings for 6, 10, 15, and 21 minutes to ensure optimal ventilation when needed and save energy. 100mm/4” Duct Size.
- Energy Efficient: Consumes just 5/9 watts of power, with a low specific fan power (SFP) of 0.24 w/l/s, making it highly energy-efficient while maintaining top performance. Compact dimensions of 147 x 147 x 131 mm ensure easy installation.
- Durability & Safety: Long-life ball bearings with a lifespan of approximately 40,000 hours, and IP45-rated for protection against water and dust. Safe for use in wet zones with an RCD and complies with IEE wiring and Building Regulations Approved Document F.
- QuietMark Award & Quiet Operation: Awarded QuietMark by the Noise Abatement Society in 2014, the fan operates at an exceptionally low noise level of 25 dB(A), ensuring a tranquil environment while maintaining effective ventilation.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00BATAJYM |
| Air Flow Capacity | 25 Litres Per Second |
| Best Sellers Rank | 18,783 in DIY & Tools ( See Top 100 in DIY & Tools ) 35 in Bathroom Fans |
| Blade Length | 100 Millimetres |
| Brand | Airflow |
| Brand Name | Airflow |
| Colour | Humidity |
| Control Method | Remote |
| Controller Type | Humidity Sensor & Timer Controlled |
| Country of Origin | Germany |
| Customer Reviews | 4.0 out of 5 stars 159 Reviews |
| Electric Fan Design | Exhaust Fan |
| Electric fan design | Exhaust Fan |
| Finish Type | Painted |
| Form Factor | Wall/Ceiling Mount |
| Global Trade Identification Number | 05019009306469 |
| Included Components | 3 Years Warranty, Extractor Fan, Mounting Kit |
| Indoor Outdoor Usage | Indoor |
| Installation Type | wall and ceiling |
| Is Product Cordless | No |
| Item Dimensions D x W x H | 13D x 14.7W x 14.7H centimetres |
| Item Type Name | Extractor Fan |
| Manufacturer | Airflow |
| Material | Plastic |
| Model Name | QT100HT |
| Model Number | 9041261 |
| Motor Type | Axial |
| Mounting Type | Wall/Ceiling Mount |
| Noise Level | 25 Decibels |
| Number of Blades | 4 |
| Number of Power Levels | 2 |
| Number of Speeds | 2 |
| Part Number | QT100HT (9041261) |
| Power Source | Corded Electric |
| Power source | Corded Electric |
| Product Warranty | 3 years warranty | technical support | call: +44 1494 525252. |
| Product dimensions | 13D x 14.7W x 14.7H centimetres |
| Recommended Uses For Product | Air Circulation, Exhausting, Ventilating |
| Room Type | Bathroom |
| Size | 100mm White |
| Smart Home Compatibility | Not Smart Home Compatible |
| Special Features | 2 Mins Delay Start, 3 Years Warranty,, German Made, ● 3 Years Warranty ● Made in Germany ● Humidity Sensor Activation ● Adjustable Timer ● QuietMark Certified ● Low Power (5Watts) ● Low Noise 25dB ● IP45 Rated ● Two Speed Options ● Building Regulations Certified ● Long Life 40,000+ Hours ● Back Draught Shutter, ● IP45 Rated ● Two Speed Options ● Building Regulations Certified ● Long Life 40,000+ H… |
| Specification Met | Building Regulation Compliant, CE, QuietMark Certified, RoHS, TUV |
| Speed | 2 RPM |
| Standby Power Shutoff | Energieffektivitet 5/9W |
| Style | Humidity |
| Unit Count | 1.0 count |
| Voltage | 230 Volts |
| Wattage | 5 watts |

## Product Details

- **Brand:** Airflow
- **Colour:** White
- **Electric fan design:** Exhaust Fan
- **Mounting type:** Wall/Ceiling Mount
- **Power source:** Corded Electric
- **Product dimensions:** 13D x 14.7W x 14.7H centimetres
- **Recommended uses for product:** Air Circulation, Bathroom, Ensuites, Toilets, Exhausting, Ventilating
- **Room type:** Bathroom
- **Style:** Humidity

## Images

![QT100HT Humidity Extractor Fan, 25 l/s, 100mm Duct | German Made, QuietMark Certified 25 dB, Adjustable Humidity, Timer Overrun and Delay Start, 2-Speed 5W/9W, 3-Year Warranty - Image 1](https://m.media-amazon.com/images/I/41cdk1RGqbL.jpg)
![QT100HT Humidity Extractor Fan, 25 l/s, 100mm Duct | German Made, QuietMark Certified 25 dB, Adjustable Humidity, Timer Overrun and Delay Start, 2-Speed 5W/9W, 3-Year Warranty - Image 2](https://m.media-amazon.com/images/I/31tatCt0CmL.jpg)
![QT100HT Humidity Extractor Fan, 25 l/s, 100mm Duct | German Made, QuietMark Certified 25 dB, Adjustable Humidity, Timer Overrun and Delay Start, 2-Speed 5W/9W, 3-Year Warranty - Image 3](https://m.media-amazon.com/images/I/51Kcai3CpXL.jpg)
![QT100HT Humidity Extractor Fan, 25 l/s, 100mm Duct | German Made, QuietMark Certified 25 dB, Adjustable Humidity, Timer Overrun and Delay Start, 2-Speed 5W/9W, 3-Year Warranty - Image 4](https://m.media-amazon.com/images/I/31kkoViCg1L.jpg)
![QT100HT Humidity Extractor Fan, 25 l/s, 100mm Duct | German Made, QuietMark Certified 25 dB, Adjustable Humidity, Timer Overrun and Delay Start, 2-Speed 5W/9W, 3-Year Warranty - Image 5](https://m.media-amazon.com/images/I/71ffUsFZdML.jpg)

## Available Options

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

## Questions & Answers

**Q: what are the measurements to fit in the wall/ceiling?**
A: A 100mm Diameter CIrcle is required to fit the fan to the wall/ceiling. The actual dimensions of the fan are 147mm x 147mm x 131mm. They are also available in 120mm and 150mm diameter circle mount.

**Q: does this have Installed duct, so no condensation build up ruins the fan.  Since I want to put into bathroom/toilet ceiling that goes up to loft**
A: The Quietair fans do not come with any ducting within the box, however the fans must be installed with ducting. The ducting will run between the fan to suitable external grill or roof terminal.A condensation trap should be fitted above the fan, this is to stop any condensate formed within the ducting from running back into the fan and potentially causing damage. Ducting Kits Airflow offer: Part number: 72643201 - Cavity wall kit 100mm Ø rigid duct, round grille and screwsPart number: 72643601 - Flexible duct kit 100mm Ø 3m ducting, square grille & screwsCondensation Trap Airflow Offer:Part number: 51978301 - 100mm condensation trap

**Q: Our qt100ht has only had just 2yrs use and stopped working. airflow what are our options?**
A: They do stop working like most fans after a few year but the life can be extended if you 
Keep the fan clean by removing dust. Leaving dust on reduces efficiency and upsets balance. May even work again after this.
Don't leave light on for days as the fan keeps working and the bearings get hot

**Q: What is the sound level in dB at the highest speed?**
A: From the manufacturer’s website ‘ Sound pressure 25/30 dB(A) @ 3m’. I assume the 2 figures refer to the 75/90m3/hr modes. I have a number of these units fitted in my house ...the lower noise/volume/speed is indeed quiet but the higher noise/volume/speed mode is of course noisier and I would hazard annoying at night if you install in an en-suite. I have a unit in my en-suite which is set to trigger at low noise/volume/speed on humidity and higher when linked to turning on via ceiling lights. As I have low-level led lights turning on via a motion sensor at night, I can ensure that I don’t trigger the high-speed fan mode and disturb my light-sleeping wife.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Excellent product
*by F***K on 3 August 2025*

Excellent fan ticks all the boxes easy to fit fixing holes much job today existing duct

### ⭐⭐⭐⭐⭐ Straight swap.
*by P***R on 12 September 2023*

Easy to swap for my old one that die after 16 years. Initially tried smaller one that was quieter but didn't get same air flow suction so I came back to that one, as no window in that bathroom it gets job done perfectly, no steam on mirrors.

### ⭐ Stopped working in 6 months
*by M***E on 6 July 2026*

Stopped working in 6 months

## Frequently Bought Together

- Airflow QT100HT Extractor Fan with Adjustable Humidity & Timer - 100mm/4 Duct - German Made, QuietMark Certified 25 dB, Energy Efficient 5/9W, 2-Speed Operation Upto 25 l/s (90 m³/h), 3-Year Warranty
- Airflow QT100T Extractor Fan with Auto Start & Adjustable Timer – 100mm/4 Duct - German Made, QuietMark Certified 25 dB, 2-Speed Operation Upto 25 L/s, Energy Efficient 5/9W, 3-Year Warranty

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-07-27*