The Best Continuous Running Extractor Fan in 2023

The Best Continuous Running Extractor Fan based on SFP, extraction rate and more.

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These days, bathrooms, utility rooms, kitchens, etc have become hotbeds for bad air quality and pollutants lurking around. This is why it’s important to invest in a quality continuous-running extraction fan to make sure the air stays clean, healthy and most importantly, free from odours!

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Finding the correct extractor fan can be quite daunting as there are many options available, with different features to consider such as noise levels, power ratings and more. What makes an excellent constantly-running extractor fan? How does one choose the right one for their needs? To help you find the perfect product for your budget, we will review some of the best continuous running extractor fans on the market this year. Let’s get started.

Top Three Continuous Running Extractor Fans

Our Best Continuous Running Extractor Fan Picks

1) Greenwood Airvac Unity CV2GIP dMEV Extractor Fan

Greenwood Airvac CV2GIP Unity Any Room Extractor dMEV Fan
Greenwood Airvac CV2GIP Unity Any Room Extractor dMEV Fan Other Angle

Introducing the Greenwood Airvac Unity CV2GIP. This state-of-the-art ventilation solution delivers the lowest energy requirement of Building Regulation compliance while also providing ultra-quiet operation and supreme energy efficiency. It uses Unity CV2GIP to ensure the correct airflow performance with the lowest possible power requirement, leading to EST Best Practice compliance with a Specific Fan Power as low as 0.16 W/l/s.

The Unity CV2GIP Extractor Fan comes with Greenwood SMART Technology for even better home ventilation, an extra-low voltage option for bathrooms (CV2SVGIP), ultra-quiet running noise as low as 10 dB on trickle speed, and a three-year warranty. Perfect for social landlords and tenants alike, it ensures low energy costs and effective ventilation all year round!

Key Features

  • 3-Year Warranty
  • Low noise level of 10dB
  • Optional extra low voltage option for bathrooms
  • Complies with System 3 (dMEV)
  • Specific fan power as low as 0.16 W/l/s


  • Brand: Greenwood Airvac
  • Model: CV2GIP
  • Weight: 770g

2) Airflow iCONstant HT Continuous Running Humidity Timer Fan

Airflow iCONstant Continuous Running Fan
Airflow iCONstant HT Continuous Running Fan

The Airflow iCONstant is the perfect choice for a quiet, reliable, and efficient ventilation solution. It features a continuous-running axial fan with three selectable trickle speeds of 6 l/s, 8 l/s, and 13 l/s. It also has an intelligent humidity sensor that will automatically activate the boost speed when the humidity reaches your preset point between 60 and 90%.

For added convenience, the interchangeable control modules allow you to match the fan to your specific installation requirements. The unique design of this fan has earned it a Red Dot Design Award for its silent iris shutter, which prevents back staggers. Plus, it meets all building regulation requirements and boasts an IPX4 rating, making it safe and durable in any environment. And there are SELV versions available too!

Key Features

  • Silent Iris shutter won Red Dot Design Award 
  • Comes with a humidity sensor
  • Super low trickle speeds 
  • Boost mode
  • Multiple optional control modules


  • Brand: Airflow
  • Model: iCONstant HT
  • Extraction Rate: 280 m³/h
  • Power Usage: 2.9W
  • Weight: 550g

3) Vent Axia 443176 Low Carbon SELV Extractor Fan

Vent Axia 443176 Low Carbon SELV Extractor Fan
Vent Axia 443176 Low Carbon SELV Fan

The Vent Axia 443176 Low Carbon SELV Extractor Fan is an innovative and reliable fan specifically designed to provide whole-house system ventilation in rooms with a fixed bath or shower. This fan is suitable for wall, ceiling, panel, and window mounting with an IPX7 ingress protection rating, making it safe in even the most humid of bathrooms. It also comes with hybrid technology, which means you have total control over the ventilation rate with two trickle flow rates (6 l/s or 9 l/s) adjustable via a simple “jumper” on the control board. The 15 l/s boost speed is adjustable using a simple switched-live or integral humidistat and operates almost silently, allowing you to enjoy its benefits without intrusive noise. With a 5-year motor guarantee, this high-quality fan will keep your bathroom ventilated and safe for years to come.

Key Features

  • Suitable for wall, ceiling, panel, and window mounting
  • SELV (Safety Extra Low Voltage) compliant
  • IPX7 rated
  • Simple “jumper” switch for easy flow rate selection (6 l/s or 9 l/s)
  • Adjustable boost speed of 15 l/s via switched live or integral humidistat
  • It runs virtually silently and optimises ventilation without making any noise
  • A 5-year motor guarantee ensures maximum performance throughout its lifetime


  • Brand: Vent Axia
  • Model: 443176
  • Weight: 758g

4)  Airflow LVECODST Continuous Running 100mm Extractor Fan

Airflow LVECODST (72684312) Centrifugal Low Voltage Continuous Running Extractor Fan
Airflow LVECODST (72684312) Centrifugal Low Voltage, Continuous Running 100mm Fan

The Airflow LVECODST Continuous Running 100mm Extractor Fan is the perfect solution for long or arduous duct runs. This filterless extractor fan has two speeds and is intended to provide continuous low-voltage boost and extract ventilation. It includes a five-year warranty and features an IPX5 rating, meaning it can be used in Zone 1 of an ensuite or bathroom as long as current wiring regulations are followed. With 100mm outlet capability and the ability to be positioned on the ceiling or wall, portrait or landscape, surface or recessed, this fan has multiple installation possibilities.

Key Features

  • Continuously running centrifugal filterless extractor fan with two speeds
  • Intended for use on long or difficult duct runs where duct pressure may be an issue
  • IP Rating of IPX5
  • Five-year warranty
  • Exceptionally quiet operation for a centrifugal fan
  • Low-energy motors help reduce carbon emissions and save on energy bills
  • Set a timer to run between 2 and 45 minutes at boost speed, then return to low speed when finished
  • Boost speed is triggered remotely by a switch or a pull cord switch incorporated into the fan
  • Extremely adaptable, as it can be surface- or recessed-mounted


  • Brand: Airflow
  • Model: ‎LVECODST (72684312)
  • Weight: 1.4kg

5) Manrose CRCHTP Continuous Extractor Bathroom Fan

Manrose CRCHTP Continuous Extractor Bathroom Fan
Manrose CRCHTP Continuous Extractor Fan

The Manrose CRCHTP is a powerful, energy-efficient fan designed to provide silent, continuous ventilation in any bathroom, kitchen, or utility room. It’s equipped with an LED that turns on when the switched-live, pull cord, or humidity sensor is activated for added convenience. The fan features a low-energy motor for minimal power consumption and a 98-mm spigot for easy installation in any 100-mm ducting. The pull cord allows users to switch the fan from trickle speed up to two speeds in boost mode, depending on the requirement. An adjustable humidity sensor automatically boosts to the selected speed once it reaches preset levels. It also includes an overrun timer so that it will remain at the boost level before reverting back after the set time has elapsed. This fan provides functionality without compromising performance or quality and comes with an impressive 3-year warranty.

Key Features

  • Pull Cord, Timer and Humidity Sensor all in one fan
  • Just 1.5W at trickle speed
  • Easy clean and filterless reducing maintenance
  • Designed to run continuously with a boost function to comply with Part F
  • LED light
  • Low steady noise level of 15dB
  • 3-year warranty


  • Brand: Manrose
  • Model: CRCHTP
  • Weight: 1kg

6) Envirovent ECO dMEV T Continuously Running Extractor Fan

Envirovent ECO dMEV T Continuously Running Decentralised Extractor Fan dMEV Timer Model
Envirovent ECO dMEV T Continuously Running Decentralised Extractor Fan dMEV Timer Model Other Angle

The Envirovent ECO dMEV T is a continuously running extract ventilation fan that boasts up to 5 adjustable trickle speed settings, a timer overrun adjustable from 1 to 30 minutes, and a power consumption of up to 16 watts. With an extraction rate of up to 21 litres per second and 75 cubic metres per hour, this extractor fan provides plenty of airflow. It’s also extremely quiet, operating at less than 20 dB(A) @ 3 m and meeting Building Regulations Part F. The Continuous Volume Extract Level is adjustable (at installation) from 4 litres per second to 15 litres per second, making it eligible to achieve a low Specific Fan Power of 0.28 W/l/s according to SAP Appendix Q while being just 158mm wide by 158mm tall by 48mm deep (beyond the installed surface).

Key Features

  • Constant volume with 5 adjustable trickle speed settings
  • Extraction rate up to 21 litres per second
  • Incredibly quiet running below 20 dB(A) @ 3m
  • Adjustable Run On Timer & Humidity Sensor
  • DC motor mounted on Elastic Blocks for silent operation
  • Low power consumption down to 1.5 Watts


  • Brand: Envirovent
  • Model: ‎ECO dMEV T
  • Extraction Rate: 75 m³/h
  • Power Usage: 20W
  • Weight: 440g

Frequently Asked Questions (FAQs)

What is the Best Continuous Running Extractor Fan?

We found the Best Continuous Running Extractor Fan to be the Greenwood Airvac Unity CV2GIP. It is one of the most popular Continuous Running Extractor Fans on the market, runs quietly at 10dB, has a low SFP of 0.16, features a 3-year warranty, uses low energy so perfect for landlords, and more!

What is a continuous-running extractor fan?

A continuously running extractor fan is a ventilation system that continuously pulls air from indoors into the outdoors. Such fans are often mounted on walls and can be used to help control moisture, heat, and airborne odour levels in the home. They are typically rated for efficiency at extraction rates of over 20 cubic metres per hour, making them suitable for a wide range of applications. The sound is low when compared to other mechanical ventilation systems, and the motor can last for many years with minimal maintenance. Continuously running extractor fans are therefore widely used both in residential and commercial settings but typically favoured in commercial settings.

Should an extractor fan be on all the time?

Generally, it is not necessary for an extractor fan to be left on all the time. This can be a waste of electricity and may cause discomfort in the home if too much air is being circulated, which could lead to draughts. Instead, it should only be used when it is needed, such as during cooking or when using the bathroom, in order to reduce moisture levels and help circulate fresh air within the home. This can also help prevent condensation from building up within walls and ceilings, which can damage property over time.

Related: Solar Powered Extractor Fan

How long can you run an extractor fan?

An extractor fan can run for as long as it is needed, provided that it has the appropriate power supply. Most extractor fans come with a built-in thermostat that allows you to set and monitor the amount of time the fan is running. This helps reduce energy consumption and ensures that the fan doesn’t become too hot during operation. If left on continually, it is important to ensure ventilation is maintained in the form of fresh air entering rooms, as extracting air may cause problems such as pressurisation and extraction that impair the control of room temperatures.

Related: How long should a bathroom fan run for?

Does an extractor fan use a lot of electricity?

Extractor fans can use a lot of electricity, depending on the size and power of the fan. Smaller fans or those with lower power settings typically use less electricity as they are running slower and at a lower intensity compared to more powerful extractor fans. It is important to note that most extractor fans also feature timers, so you can set them to turn off after a certain amount of time in order to save energy. Ultimately, it depends on your specific fan and the settings for how much electricity an extractor fan will use.

Related: How much electricity does an extractor fan use?

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