Envirovent Quro dMEV Extractor Fan with Timer QRST-LC

EnviroVent Quro QRST-LC — Low Noise Continuous Running dMEV Fan With Timer For Bathrooms, Kitchens & WCs

The EnviroVent Quro QRST-LC is a low profile, continuous running decentralised mechanical extract ventilation (dMEV) fan with integral over-run timer, designed for bathrooms, kitchens, utilities, en-suites and WCs. With adjustable trickle and boost speeds from 5 up to 30l/s, constant volume technology and a market-leading specific fan power (SFP) as low as 0.08W/l/s, it delivers compliant whole-house extract rates with very low running costs.

A high efficiency DC motor and mixed-flow impeller keep noise to a minimum – as low as 8.8dB(A) at 5l/s measured at 3m – making Quro a strong choice for noise-sensitive residential projects. The slim 175x175mm fascia and side-mounted digital display give a discreet, modern finish that suits new build and refurbishment alike.

Flexible, SAP-Listed dMEV For Any Wet Room

Quro is SAP PCDB listed for both rigid and semi-rigid ductwork, with SFPs down to 0.08W/l/s on through-wall installations, helping designers meet Part F and Part L targets. The QRST-LC variant offers five selectable trickle speeds (5, 8, 11, 13 or 16l/s) and a configurable boost between 20 and 30l/s, so the same fan can be commissioned for use in small WCs through to high-load kitchens.

Constant Volume With Nuisance-Noise Limiter

Built-in constant volume technology automatically adjusts fan speed to maintain the commissioned airflow as system resistance changes – for example due to duct length or wind effects – but incorporates a limiter to prevent excessive speeds and nuisance noise. That means more consistent extract rates without callbacks to tweak settings.

Quiet, Low Energy DC Motor

The low watt DC motor draws a maximum of just 4.5W and is optimised for quiet running, with sound levels typically below 20dB(A) in trickle mode at 3m. Combined with continuous operation, this helps control condensation and everyday pollutants while keeping sound and energy consumption barely noticeable for occupants.

Integral Timer & Side-Mounted Digital Display

On the QRST-LC, boost operation is controlled by an external switch (e.g. light switch) and the fan’s adjustable over-run timer. An intelligent timer mode can vary the over-run depending on how long boost has been active, helping to clear moisture and odours without wasting energy. The side display allows installers to set trickle and boost speeds and timer parameters, and provides status indications and error codes for easy commissioning and diagnostics.

Low Maintenance, IP45 Rated

With no filter to replace and a simple clip-off front cover, routine maintenance is limited to occasional wiping with a damp cloth. The unit is IP45 rated, suitable for typical wet-room locations when installed in accordance with wiring regulations, and backed by a 3-year parts warranty from EnviroVent.

Typical applications include continuous extract from bathrooms, en-suites, kitchens, utilities and WCs in new build or retrofit dwellings, especially where low noise and low running costs are key.

Key Features Of EnviroVent Quro QRST-LC dMEV Fan With Timer Include:

• Continuous Running dMEV Fan
• Low Profile Fascia With Discreet Styling
• Low Watt DC Motor
• Market Leading Specific Fan Power
• Extremely Quiet Operation
• Five Selectable Trickle Speeds 5, 8, 11, 13, and 16L Per Second
• Selectable Boost Speed Between 20L/s And 30L/s With Factory Setting At 25L/s
• Integral Over Run Timer With Optional Intelligent Mode That Varies Run On Time Depending On Boost Duration
• Constant Volume Technology Automatically Adjusts Fan Speed To Maintain Commissioned Airflow With Built In Limiter To Prevent Nuisance Noise
• Side Mounted Digital Display For Setting Trickle And Boost Speeds Timer Parameters And Viewing Status Or Error Codes
• Mixed Flow Impeller For High Performance And Improved Pressure Capability Without Compromising Airflow
• SAP PCDB Listed For Rigid And Semi Rigid Ductwork To Support Approved Document F And L Compliance
• No Filter Required With Simple Clip Off Front Cover For Easy Low Maintenance Cleaning
• Energy Consumption: 4.5W
• Maximum Flow Rate: 30l/s (108m³/h)
• Specific Fan Power: As low as 0.08w/l/s
• dB(A): 8.8dB(A) at 5l/s
• IP Rating: IP45
• Height: 175mm
• Width: 175mm
• Depth (including spigot): 128.5mm
• Spigot Diameter: 99mm
• Three Year Parts Warranty From EnviroVent For Added Peace Of Mind

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