EnviroVent ECO dMEV+ LC 100mm (4") Extractor Fan with Humidistat & Timer – ECO-DMEV+HT-LC

Quiet, Energy-Efficient Extractor Fan with Automatic Humidity Control and Adjustable Timer

The EnviroVent ECO dMEV+ LC 100mm (4") Extractor Fan with Humidistat & Timer is a high-performance, energy-efficient ventilation solution designed to improve indoor air quality and help control condensation, excess moisture and unwanted odours.

Featuring an adjustable humidity sensor, adjustable overrun timer, low-energy DC motor and constant volume technology, the ECO-DMEV+HT-LC provides intelligent ventilation for bathrooms, en-suites, toilets, kitchens and utility rooms.

Part of the innovative EnviroVent ECO dMEV+ LC range, this centrifugal extractor fan can operate continuously or intermittently, depending on the application and installation requirements.

Its built-in humidistat automatically responds to increased humidity levels, increasing extraction when additional ventilation is required. This makes it particularly useful in bathrooms, where showers and baths can produce significant amounts of moisture.

The adjustable timer allows the fan to continue extracting air after activation, helping remove lingering humidity and odours.

Unlike conventional extractor fans that operate at a fixed speed, the ECO dMEV+ LC incorporates constant volume technology, which automatically adjusts fan performance to help maintain the commissioned airflow rate despite changes in ductwork resistance.

The fan offers adjustable background ventilation settings, with airflow rates starting from approximately 4 litres per second and a maximum extraction rate of 18 litres per second (approximately 65m³/h).

Its efficient DC motor delivers low power consumption, starting from approximately 1 watt, making it particularly suitable for continuous background ventilation.

Designed for quiet operation, the ECO dMEV+ LC achieves sound levels below 20dB(A) at its quieter operating settings, helping minimise disturbance in bathrooms and other domestic spaces.

The fan features a compact 158 x 158mm front panel, a 100mm duct connection and a discreet white finish that complements modern interiors.

With IPX4 splash protection, wall or ceiling mounting options, a removable mesh filter and a 2-year manufacturer's warranty, the EnviroVent ECO-DMEV+HT-LC is an excellent choice for electricians, ventilation installers, property developers and homeowners seeking efficient, automatic moisture control.

The manufacturer's official product information confirms the humidistat and timer configuration, constant volume technology, airflow performance and installation features.

Features

• EnviroVent ECO dMEV+ LC 100mm Extractor Fan
• Manufacturer Part Number: ECO-DMEV+HT-LC
• 100mm (4-inch) centrifugal extractor fan
• Built-in adjustable humidistat
• Built-in adjustable overrun timer
• Automatic humidity-responsive ventilation
• Constant volume technology
• Suitable for continuous or intermittent operation
• Adjustable background extraction settings
• Boost function for increased ventilation
• Energy-efficient DC motor
• Low power consumption starting from approximately 1W
• Maximum airflow: 18L/s (approximately 65m³/h)
• Quiet operation below 20dB(A) at low operating settings
• IPX4 rated for splash protection
• Designed for 230V single-phase electrical installations
• 100mm duct connection
• Compact 158 x 158mm front panel
• Suitable for wall and ceiling mounting
• Removable mesh filter for easier maintenance
• Four interchangeable decorative front panel trims
• Suitable for bathrooms, WCs, kitchens and utility rooms
• SAP PCDB listed for suitable ducting configurations
• Ideal for domestic condensation control
• 2-year manufacturer's warranty

Automatic Humidity Control with Built-In Humidistat

One of the main advantages of the EnviroVent ECO-DMEV+HT-LC is its integrated adjustable humidity sensor.

The humidistat monitors moisture levels in the surrounding air and automatically increases extraction when humidity rises above the selected setting.

This is particularly beneficial in bathrooms, where showering and bathing can quickly increase humidity.

By responding automatically to changing moisture levels, the fan helps remove humid air without relying entirely on manual activation.

Benefits of Automatic Humidity Control

• Automatically responds to increased humidity
• Helps reduce excessive bathroom moisture
• Supports condensation control
• Helps reduce conditions that encourage mould growth
• Provides convenient automatic ventilation
• Suitable for bathrooms and en-suites
• Reduces reliance on manual switching
• Supports improved indoor air quality

The adjustable humidity control allows the installer to configure the fan according to the room's ventilation requirements.

Ideal for Condensation-Prone Rooms

Excess moisture can accumulate on:

• Bathroom mirrors
• Windows
• Walls
• Ceilings
• Tiles
• Grout
• Other cold surfaces

The ECO dMEV+ LC helps extract humid air before prolonged moisture accumulation becomes a problem.

Important: An extractor fan can help manage condensation, but it cannot resolve every cause of damp or mould. Adequate heating, insulation, ventilation design and building maintenance may also be necessary.

Adjustable Overrun Timer

The EnviroVent ECO dMEV+ LC Humidistat & Timer Fan incorporates an adjustable overrun timer.

The timer allows the fan to continue operating at an increased extraction rate for a selected period after the relevant boost activation ends.

This is particularly useful when moisture and odours remain in a room after use.

For example, after a shower, the fan can continue extracting humid air to help reduce lingering condensation.

The timer adjustment range is commonly specified as 1–30 minutes for this model.

Benefits of the Timer Function

• Continues extraction after activation
• Helps remove lingering humidity
• Reduces unwanted bathroom odours
• Supports more effective moisture control
• Convenient automatic operation
• Adjustable to suit room requirements
• Particularly useful for bathrooms and WCs

The combination of humidistat and timer controls makes the ECO-DMEV+HT-LC a practical choice for automatic domestic ventilation.

Constant Volume Technology

The EnviroVent ECO dMEV+ LC incorporates advanced constant volume technology.

This technology is designed to help maintain the selected airflow rate even when resistance within the ventilation system changes.

Ductwork bends, duct length and other components can affect airflow resistance.

The fan automatically adjusts its performance within its operating capabilities to help maintain the commissioned extraction rate.

Benefits of Constant Volume Ventilation

• Helps maintain consistent extraction performance
• Automatically compensates for changes in duct resistance
• Supports accurate ventilation commissioning
• Suitable for ducted extraction systems
• Helps deliver the selected airflow rate
• Practical for modern domestic ventilation installations
• Supports reliable background extraction

This feature makes the ECO-DMEV+HT-LC particularly useful where consistent airflow is important.

The manufacturer's technical information identifies constant volume operation as a core feature of the ECO dMEV+ LC range.

Continuous Running and Intermittent Ventilation

The EnviroVent ECO-DMEV+HT-LC provides flexible operating options.

The fan can be configured for continuous background ventilation or intermittent extraction, subject to the intended application.

Continuous Running Operation

In continuous mode, the fan operates at a selected low-level extraction rate to provide ongoing ventilation.

When humidity increases or a boost signal is activated, the fan increases extraction.

Once the boost condition has ended and the applicable timer period has elapsed, the fan can return to its background setting.

Benefits of Continuous Ventilation

• Provides ongoing background extraction
• Helps manage everyday humidity
• Supports improved indoor air quality
• Reduces the accumulation of stale air
• Suitable for modern domestic ventilation systems
• Low-energy operation for extended running periods

Intermittent Operation

Intermittent operation allows the fan to operate when activated rather than continuously.

This can be useful in suitable bathroom and WC installations.

Important: Intermittent operation is not suitable for kitchen and utility room applications under the manufacturer's stated restrictions. These locations require the appropriate continuous ventilation configuration and extraction rate.

Energy-Efficient Low-Wattage DC Motor

The ECO-DMEV+HT-LC incorporates a low-energy DC motor designed to deliver efficient extraction while minimising electricity consumption.

The manufacturer's technical information specifies power consumption starting from approximately 1W, with a maximum absorbed power of 9W for the ECO dMEV+ LC range.

This makes the fan particularly suitable for continuous ventilation applications where energy efficiency is important.

Benefits of DC Motor Technology

• Low electricity consumption
• Suitable for continuous background extraction
• Efficient airflow performance
• Reduced running costs compared with many higher-wattage alternatives
• Practical for energy-conscious homes
• Suitable for modern ventilation installations
• Designed for reliable everyday operation

The motor is designed for quiet operation and incorporates sealed-for-life ball bearings.

Actual electricity consumption depends on the selected airflow setting and operating conditions.

Quiet Extractor Fan Operation

The EnviroVent ECO dMEV+ LC is designed to provide effective ventilation with minimal noise.

The manufacturer's product information highlights quiet operation below 20dB(A) at lower operating settings.

This makes the fan particularly attractive for bathrooms, en-suites and other areas where a quieter indoor environment is desirable.

Benefits of Quiet Ventilation

• Suitable for bathrooms and en-suites
• Helps minimise noise during background operation
• Practical for bedrooms with adjoining bathrooms
• Comfortable for everyday domestic use
• Suitable for continuous ventilation
• Reduces disturbance during quieter periods

The fan's low-noise motor design helps provide a balance between extraction performance and acoustic comfort.

Please note: Actual noise levels depend on airflow settings, mounting arrangements, ductwork and installation conditions. The quoted low-noise figure should not be interpreted as the sound level at maximum extraction.

Powerful Centrifugal Extraction

The EnviroVent ECO-DMEV+HT-LC uses a centrifugal fan to provide effective extraction through suitable ventilation ductwork.

Centrifugal fans are commonly selected for installations where airflow must be maintained against resistance from ducts, bends and other ventilation components.

The ECO dMEV+ LC combines centrifugal extraction with constant volume control to help maintain the selected airflow rate.

Airflow Performance

• Minimum adjustable background airflow: Approximately 4L/s
• Maximum airflow: 18L/s
• Maximum extraction rate: Approximately 65m³/h
• Fan type: Centrifugal
• Airflow control: Constant volume technology

Benefits of Centrifugal Extraction

• Suitable for ducted ventilation systems
• Adjustable airflow settings
• Practical for bathroom extraction
• Suitable for continuous background ventilation
• Helps remove humid air and unwanted odours
• Supports domestic ventilation requirements

The fan's performance must be assessed against the actual ductwork arrangement and installation requirements.

Ideal for Bathroom Ventilation

The EnviroVent ECO dMEV+ LC 100mm Extractor Fan with Humidistat & Timer is particularly suitable for bathrooms.

Bathrooms frequently experience elevated humidity due to showers, baths and everyday use.

Without adequate ventilation, moisture can accumulate on surfaces and contribute to condensation problems.

The ECO-DMEV+HT-LC helps extract humid air and automatically responds when moisture levels increase.

Bathroom Ventilation Benefits

• Automatic humidity-responsive extraction
• Helps remove excess moisture
• Supports condensation control
• Extracts stale air and unwanted odours
• Suitable for continuous background ventilation
• Quiet operation
• Adjustable timer for additional extraction
• Compact and discreet appearance
• Suitable for wall or ceiling installation

The combination of humidistat, timer and constant volume technology makes this model particularly useful for bathroom ventilation systems.

Suitable for En-Suites and Toilets

The EnviroVent ECO-DMEV+HT-LC is also suitable for en-suite bathrooms and WCs.

These rooms often have limited natural ventilation, making mechanical extraction important for maintaining indoor air quality.

The fan provides automatic moisture-responsive extraction alongside adjustable timer functionality.

En-Suite and WC Benefits

• Quiet operation
• Automatic humidity sensing
• Adjustable overrun timer
• Compact design
• Low-energy background extraction
• Suitable for wall and ceiling mounting
• Helps remove unwanted odours
• Practical for rooms with limited natural ventilation

The fan's discreet design makes it suitable for modern residential interiors.

Kitchen and Utility Room Ventilation

The EnviroVent ECO dMEV+ LC can also be used for suitable domestic kitchen and utility room ventilation applications.

Kitchens and utility rooms can generate moisture through cooking, washing, drying and other household activities.

Continuous mechanical extraction helps remove humid air and supports adequate ventilation.

Suitable Applications

• Domestic kitchens
• Utility rooms
• Laundry areas
• Residential ventilation systems
• New-build properties
• Home refurbishment projects

Important: For kitchen and utility room applications, the fan must be configured for suitable continuous operation rather than intermittent extraction.

The required ventilation rate and system arrangement must comply with the applicable UK Building Regulations.

IPX4 Rated for Splash Protection

The EnviroVent ECO-DMEV+HT-LC has an IPX4 ingress protection rating.

IPX4 indicates protection against splashing water from any direction.

This makes the fan suitable for appropriately positioned installations in moisture-prone environments.

IPX4 Protection Benefits

• Protection against splashing water
• Suitable for appropriate bathroom installations
• Practical for moisture-prone domestic environments
• Supports safe installation when correctly positioned
• Suitable for wall and ceiling mounting in permitted locations

Important: IPX4 does not mean the fan is waterproof or suitable for immersion.

The installation location must comply with the manufacturer's instructions and applicable bathroom electrical zone requirements.

Compact 100mm Design

The EnviroVent ECO dMEV+ LC features a compact front panel measuring 158 x 158mm.

Its 100mm duct connection makes it suitable for appropriately sized ventilation ducting systems.

The compact design allows the fan to be installed discreetly in suitable wall or ceiling locations.

Product Dimensions

• Height: 158mm
• Width: 158mm
• Overall Depth: 127mm
• Duct Connection: 100mm
• Nominal Fan Size: 4 Inches

Benefits of the Compact Design

• Suitable for modern bathrooms
• Discreet appearance
• Practical for wall mounting
• Suitable for ceiling installation
• Compatible with suitable 100mm ducting
• Useful for refurbishment projects
• Compact footprint

The manufacturer's technical documentation confirms the 158 x 158 x 127mm overall dimensions, including the spigot.

Wall and Ceiling Mounting

The EnviroVent ECO-DMEV+HT-LC is designed for flexible installation in suitable wall and ceiling locations.

Its compact construction and 100mm duct connection make it suitable for a variety of domestic ventilation arrangements.

Installation Options

• Wall-mounted bathroom extraction
• Ceiling-mounted bathroom extraction
• En-suite ventilation
• WC extraction
• Suitable kitchen ventilation
• Utility room ventilation
• Domestic ducted ventilation systems

Benefits of Flexible Mounting

• Suitable for different room layouts
• Practical for new-build installations
• Useful for refurbishment projects
• Compact design
• Compatible with suitable 100mm ducting
• Allows ventilation to be positioned according to room requirements

The ducting route, termination, electrical connections and airflow settings must be designed and installed correctly.

Contemporary White Finish with Interchangeable Trims

The EnviroVent ECO dMEV+ LC features a modern white front cover designed to complement a wide range of interior styles.

The fan is supplied with four interchangeable decorative front panel trims, allowing the appearance to be customised.

The trim colours are:

• Green
• Red
• Blue
• Yellow

Design Benefits

• Contemporary white finish
• Compact and discreet appearance
• Suitable for modern bathrooms
• Complements neutral interiors
• Interchangeable decorative trims
• Practical for wall and ceiling installations

The simple design helps the fan blend into surrounding décor while delivering effective ventilation.

Removable Mesh Filter for Easier Maintenance

The EnviroVent ECO-DMEV+HT-LC incorporates a removable mesh filter.

The filter helps prevent debris from entering the fan mechanism and can be removed for cleaning.

Regular maintenance helps maintain airflow performance and supports reliable operation.

Maintenance Benefits

• Removable mesh filter
• Easier cleaning
• Helps protect the fan mechanism
• Supports consistent extraction performance
• Practical for domestic ventilation systems
• Designed for routine maintenance

The fan should be maintained according to the manufacturer's instructions.

Important: Always isolate the electrical supply before carrying out maintenance.

SAP PCDB Listed Ventilation Performance

The EnviroVent ECO dMEV+ LC is SAP PCDB listed for suitable rigid ducting configurations.

The manufacturer's information identifies a Specific Fan Power as low as approximately 0.22W/l/s under specified test conditions.

SAP PCDB listings provide independently recognised ventilation performance data for use in relevant building energy assessments.

Benefits of SAP PCDB Listing

• Supports ventilation performance assessment
• Provides recognised energy performance data
• Suitable for energy-conscious residential projects
• Helps designers select appropriate ventilation equipment

Actual performance and eligibility depend on the installed configuration and applicable assessment requirements.

• Brand: EnviroVent
• Product Range: ECO dMEV+ LC
• Product Code / SKU: ECO-DMEV+HT-LC
• Product Type: Extractor Fan with Humidistat & Timer
• Fan Size: 100mm
• Nominal Diameter: 4 Inches
• Duct Connection: 100mm
• Fan Technology: Centrifugal
• Motor Type: Low-Energy DC Motor
• Humidity Sensor: Yes
• Humidistat Type: Adjustable
• Timer: Yes
• Timer Type: Adjustable Overrun Timer
• Timer Adjustment Range: 1–30 Minutes
• Operating Modes: Continuous or Intermittent, Subject to Application
• Boost Function: Yes
• Constant Volume Technology: Yes
• Adjustable Background Airflow: Yes
• Minimum Background Airflow: Approximately 4L/s
• Maximum Airflow: 18L/s
• Maximum Extraction Rate: Approximately 65m³/h
• Minimum Power Consumption: Approximately 1W
• Maximum Absorbed Power: 9W
• Specific Fan Power: Down to 0.22W/l/s under specified test conditions
• Rated Voltage: 230V AC
• Number of Phases: 1
• Frequency: 50Hz
• Low-Noise Operation: Below 20dB(A) at lower operating settings
• IP Rating: IPX4
• Colour: White
• Mounting Options: Wall or Ceiling
• Height: 158mm
• Width: 158mm
• Overall Depth: 127mm
• Dimensions (H x W x D): 158 x 158 x 127mm
• Approximate Product Weight: 0.57kg
• Removable Mesh Filter: Yes
• Interchangeable Decorative Trims: Yes
• Decorative Trim Colours: Green, Red, Blue and Yellow
• Suitable for Bathrooms: Yes
• Suitable for En-Suites: Yes
• Suitable for Toilets / WCs: Yes
• Suitable for Kitchens: Yes, with appropriate continuous ventilation configuration
• Suitable for Utility Rooms: Yes, with appropriate continuous ventilation configuration
• SAP PCDB Listed: Yes, for specified ducting arrangements
• Manufacturer's Warranty: 2 Years

 

Suitable Applications

The EnviroVent ECO-DMEV+HT-LC 100mm Extractor Fan with Humidistat & Timer is suitable for a wide range of domestic ventilation applications, including:

• Bathroom Extractor Fan Installations
• En-Suite Bathroom Ventilation
• Toilet and WC Extraction
• Domestic Kitchen Ventilation
• Utility Room Ventilation
• Continuous Mechanical Extract Ventilation
• Background Ventilation Systems
• Residential Ventilation Upgrades
• New-Build Homes
• House Renovations
• Bathroom Refurbishments
• Kitchen Refurbishments
• Flats and Apartments
• Domestic Moisture Extraction
• Automatic Humidity Control
• Condensation Management
• Low-Energy Ventilation Systems
• Quiet Extractor Fan Installations
• Wall-Mounted Extractor Fans
• Ceiling-Mounted Extractor Fans
• 100mm Ducted Ventilation Systems
• Electrical Contractor Installations
• Property Maintenance Projects
• Residential Ventilation Improvements

Important: The selected operating mode and extraction rate must meet the requirements of the installation.

Why Choose the EnviroVent ECO-DMEV+HT-LC Extractor Fan?

The EnviroVent ECO dMEV+ LC 100mm Extractor Fan with Humidistat & Timer offers an excellent combination of automatic moisture control, quiet operation, energy efficiency and reliable ventilation performance.

Its adjustable humidistat automatically responds to increased humidity levels, helping remove moisture from bathrooms and other domestic wet rooms.

The adjustable overrun timer provides additional extraction after activation, helping remove lingering humidity and unwanted odours.

The fan's constant volume technology helps maintain the selected airflow rate despite changes in ductwork resistance.

Its low-energy DC motor provides efficient extraction with power consumption starting from approximately 1W, making it particularly suitable for continuous background ventilation.

With a maximum airflow of 18L/s (approximately 65m³/h), the ECO-DMEV+HT-LC offers effective extraction for suitable domestic applications.

Its quiet operating characteristics make it particularly attractive for bathrooms, en-suites and other areas where minimal noise is desirable.

The IPX4 rating provides splash protection, while the compact 158 x 158mm front panel and 100mm duct connection allow installation in suitable wall and ceiling locations.

The contemporary white finish and interchangeable decorative trims help the fan complement modern bathroom and kitchen interiors.

With a removable mesh filter for easier maintenance and a 2-year manufacturer's warranty, the EnviroVent ECO-DMEV+HT-LC is a practical choice for homeowners, electricians, ventilation specialists and property developers seeking an intelligent, energy-efficient extractor fan.