Quiet-Vent Catalog 2025

VENTILATION SOLUTIONS 2025 Catalogue

Quiet-Vent provides premium radial ducting systems engineered for easy installation, superior airflow, and whisper-quiet operation—trusted by builders and installers for new builds and retrofits

ALL IN ONE KITS

Complete Kits for Every Home Our all-in-one MVHR and MEV kits offer a streamlined solution for delivering clean, quiet, and energy-efficient ventilation across a wide range of residential projects. By combining high performance units with our premium Quiet-Vent radial ducting system, each kit is designed to simplify installation while maximising comfort and air quality. Whether you’re working on a compact retrofit or a spacious new build, our solutions ensure effective airflow, noise reduction, and smart control integration.

Choose from a trusted selection of ventilation units including the Mitsubishi Electric VL Series (VL-250, VL-350, VL-500), the adaptable BSK Notus, and DUCO’s intelligent Silent UK and Reno systems. All kits are tailored for performance, flexibility, and ease of use—making them ideal for installers, designers, and homeowners alike. From 4-room MEV setups to 14-point whole-house MVHR systems, we provide complete, ready-to-go solutions that support healthy living environments and long term efficiency.

RENOVATION MVHR KIT

BSK NOTUS MVHR KIT Overview

The Notus 12 room Kit is a complete whole-house heat recovery system ideal for 3–4 bedroom homes up to 225 m². It features the lightweight, high-efficiency BSK Notus MVHR unit with Wi-Fi app control, touchscreen interface, humidity based boost, and up to 90% heat recovery. Paired with the Quiet-Vent 12-point radial ducting kit, it offers quick, quiet installation using crushproof antibacterial pipework, quality air valves, and silencers—making it perfect for retrofit applications with minimal disruption.

System Capabilities

Kit Contents

System Type

Whole House Heat Recovery System

Number of Rooms

Up to 4 Bedroom Homes

Max Dwelling Size

225m²

Installation

Retrofit/Renovation

Kit Reference

BSK-NOTUS-KIT

Description

Part Number

Qty

125mm - Quiet-vent Extract Air Valve PVC

QV-125AVP-E

6

125mm - Quiet-vent Supply Air Valve PVC

QV-125AVP-S

6

125mm - PVC Pipework x 2 meter

P125-2

4

125mm - PVC Pipe connector

C125

3

125mm - PVC 90º bends

B90125

10

PVC reducer 150mm (FM) - 125mm (M)

R150125P

2

Quiet-Vent 125mm x 500mm - Flexi insulated sound attenuator

QV125F-SILENCER

2

Sound Control

25mm - 1m Foil Back Glass Fibre Insulation (1.2m x 1 m)

INS25

4

Insulation

QV - 125mm - S/Steel cowl with bird mesh

QV-SSC125M

2

External Grilles

Quiet-Vent 125mm Rubber flexible circular duct connector & 2 x clips

QVRC125

4

75mm - Roll Silver Foil Tape

ST75

1

Builders Strap Roll (10 meters)

BS50

2

Sealant - Grey Duct

SE380

1

75mm 50 Metre Antibacterial Radial pipe

QV75P-FS

4

Quiet-Vent 75mm Plenum

QV75-PLEN

12

QV 75mm - Standard Sealing Ring (pack of 10)

QV-75SR

5

QV 10 Pt Top Entry Distribution box -150 spigot (75mm) with 3 x blanking caps

QV75-10150TE

1

QV 12 pt Adjustable top entry Dist Box - 150 Spigot (75mm) with 3 x blanking caps

QV75-12150MTE

1

BSK NOTUS multi orientation 350m3/hr unit with humidity sensor

NOTUS/HV/350

1

BSK NOTUS wall controller - black

NOTUS/W/BLACK/ CONTROLLER

1

Air Valves

Solid Rigid Pipework

Fixings

Radial Ducting

MVHR Unit & Controls

NEW BUILD MVHR KIT

MITSUBISHI VL250 MVHR KIT Overview

The Mitsubishi NBR-10 Room Kit is a complete whole-house MVHR solution for new builds, featuring the Mitsubishi VL-250 heat recovery unit and Quiet-Vent radial ducting. Designed for 2–3 bed homes up to 150 m², it offers up to 90% heat recovery, quiet EC motor operation, and humidity-controlled boost. The system includes antibacterial radial pipework, acoustic silencers, and high-performance air valves—delivering quiet, energy-efficient ventilation with superior air quality throughout the home.

System Capabilities

Kit Contents

System Type

Whole House Heat Recovery System

Number of Rooms

Up to 3 Bedroom Homes

Max Dwelling Size

150m²

Installation

New Build Residential

Kit Reference

MIT-VL250-KIT

Description

Part Number

Qty

125mm - Quiet-vent Extract Air Valve PVC

QV-125AVP-E

5

125mm - Quiet-vent Supply Air Valve PVC

QV-125AVP-S

5

125mm - PVC Pipework x 2 meter

P125-2

4

125mm - PVC Pipe connector

C125

3

125mm - PVC 90º bends

B90125

10

PVC reducer 150mm (FM) - 125mm (M)

R150125P

2

Quiet-Vent 125mm x 500mm - Flexi insulated sound attenuator

QV125F-SILENCER

2

Sound Control

25mm - 1m Foil Back Glass Fibre Insulation (1.2m x 1 m)

INS25

4

Insulation

QV - 125mm - S/Steel cowl with bird mesh

QV-SSC125M

2

External Grilles

Quiet-Vent 125mm Rubber flexible circular duct connector & 2 x clips

QVRC125

4

75mm - Roll Silver Foil Tape

ST75

1

Builders Strap Roll (10 meters)

BS50

2

Sealant - Grey Duct

SE380

1

75mm 50 Metre Antibacterial Radial pipe

QV75P-FS

3

Quiet-Vent 75mm Plenum

QV75-PLEN

10

QV 75mm - Standard Sealing Ring (pack of 10)

QV-75SR

4

QV 10 Pt Top Entry Distribution box -150 spigot (75mm) with 3 x blanking caps

QV75-10150TE

2

Mitsubishi VL250 MVHR Unit

VL-250CZPVU-R-E

1

1Gang Momentary Boost Switch

QV-BoostSw

1

Air Valves

Solid Rigid Pipework

Fixings

Radial Ducting

MVHR Unit & Controls

NEW BUILD MVHR KIT

MITSUBISHI VL350 MVHR KIT Overview

The Mitsubishi NBR-12 Room Kit is a complete whole-house MVHR system for new build homes, featuring the energy-efficient Mitsubishi VL-350 heat recovery unit paired with a Quiet-Vent 12-room radial ducting kit. Suitable for 3–4 bedroom homes up to 225 m², it delivers up to 90% heat recovery with ultra-quiet EC motors and built-in humidity-controlled boost. The system includes antibacterial radial ducting, acoustic silencers, and high-performance air valves, ensuring consistent, low-noise ventilation and excellent air quality throughout the home.

System Capabilities

Kit Contents

System Type

Whole House Heat Recovery System

Number of Rooms

Up to 4 Bedroom Homes

Max Dwelling Size

225m²

Installation

New Build Residential

Kit Reference

MIT-VL350-KIT

Description

Part Number

Qty

125mm - Quiet-vent Extract Air Valve PVC

QV-125AVP-E

6

125mm - Quiet-vent Supply Air Valve PVC

QV-125AVP-S

6

125mm - PVC Pipework x 2 meter

P125-2

4

125mm - PVC Pipe connector

C125

3

125mm - PVC 90º bends

B90125

10

Quiet-Vent 125mm x 500mm - Flexi insulated sound attenuator

QV125F-SILENCER

2

Sound Control

25mm - 1m Foil Back Glass Fibre Insulation (1.2m x 1 m)

INS25

4

Insulation

QV - 150mm - S/Steel cowl with bird mesh

QV-SSC150M

2

External Grilles

Quiet-Vent 150mm Rubber flexible circular duct connector & 2 x clips

QVRC150

4

75mm - Roll Silver Foil Tape

ST75

1

Builders Strap Roll (10 meters)

BS50

2

Sealant - Grey Duct

SE380

1

75mm 50 Metre Antibacterial Radial pipe

QV75P-FS

4

Quiet-Vent 75mm Plenum

QV75-PLEN

12

QV 75mm - Standard Sealing Ring (pack of 10)

QV-75SR

5

Quiet-Vent 10 Pt Top Entry Distribution box -150 spigot (75mm) with 3 x blanking caps

QV75-10150TE

1

QV 12 Pt Top Entry Distribution box -150 spigot (75mm) with 3 x blanking caps

QV75-12150MTE

1

Mitsubishi VL350 MVHR Unit

VL-350CZPVU-R-E

1

1Gang Momentary Boost Switch

QV-BoostSw

1

Air Valves

Solid Rigid Pipework

Fixings

Radial Ducting

MVHR Unit & Controls

NEW BUILD MVHR KIT

MITSUBISHI VL500 MVHR KIT Overview

The Mitsubishi NBR-14 Room Kit is a wholehouse MVHR solution for new builds, featuring the high-capacity Mitsubishi VL-500 unit and Quiet-Vent radial ducting. Designed for larger homes typically 4–5 bedrooms and up to 280 m² it offers up to 90% heat recovery, quiet EC motor operation, and humidity-controlled boost. The kit includes antibacterial radial pipework, acoustic silencers, and premium air valves, delivering efficient, whisper-quiet ventilation and excellent indoor air quality.

System Capabilities

Kit Contents

System Type

Whole House Heat Recovery System

Number of Rooms

Up to 5 Bedroom Homes

Max Dwelling Size

280m²

Installation

New Build Residential

Kit Reference

MIT-VL500-KIT

Description

Part Number

Qty

125mm - Quiet-vent Extract Air Valve PVC

QV-125AVP-E

6

125mm - Quiet-vent Supply Air Valve PVC

QV-125AVP-S

8

150mm - PVC Pipework x 2 meter

P150-2

4

150mm - PVC Pipe connector

C150

3

150mm - PVC 90º bends

B90150

10

Solid Rigid Pipework

Quiet-Vent 150mm x 500mm - Flexi insulated sound attenuator

QV150F-SILENCER

2

Sound Control

25mm - 1m Foil Back Glass Fibre Insulation (1.2m x 1 m)

INS25

4

Insulation

QV - 150mm - S/Steel cowl with bird mesh

QV-SSC150M

2

External Grilles

Quiet-Vent 150mm Rubber flexible circular duct connector & 2 x clips

QVRC150

4

75mm - Roll Silver Foil Tape

ST75

1

Builders Strap Roll (10 meters)

BS50

3

Sealant - Grey Duct

SE380

1

75mm 50 Metre Antibacterial Radial pipe

QV75P-FS

5

Quiet-Vent 75mm Plenum

QV75-PLEN

14

QV 75mm - Standard Sealing Ring (pack of 10)

QV-75SR

5

QV 12 Pt Top Entry Distribution box -150 spigot (75mm) with 3 x blanking caps

QV75-12150MTE

2

Mitsubishi VL500 MVHR Unit

VL-500CZPVU-R-E

1

1Gang Momentary Boost Switch

QV-BoostSw

2

Air Valves

Fixings

Radial Ducting MVHR Unit & Controls

MEV KIT

DUCO 4 Room MEV KIT

System Capabilities System Type

Multi-Room Extraction System

Number of Rooms

Up to 4 Areas or 3 with Kitchen

Installation

New Build/Retrofit/Renovation

Kit Reference

DUCO-4-KIT

Overview

This compact 4-room MEV kit combines the ultra-quiet DucoBox Reno central extract unit with Quiet-Vent’s crushproof radial ducting system, offering a reliable, low-noise ventilation solution. Ideal for smaller homes, apartments, or retrofit projects, it provides continuous extraction from up to four wet rooms, effectively removing moisture, odours, and stale air while supporting healthier indoor air quality and energy-efficient performance.

Kit Contents

Description

Part Number

Qty

125mm - Quiet-vent Extract Air Valve PVC

QV-125AVP-E

4

Air Valves

White 125mm PVC Louvred Grill

GPVC125W

1

External Grille

125mm - PVC Pipework x 2 meter

P125-2

1

125mm - PVC Pipe connector

C125

1

Solid Rigid Pipework

Quiet-Vent 125mm TO 90mm Rubber flexible circular duct connector & 2 x clips

QVRC12590

4

FS 90mm sealing ring (90mm) (pack of 10)

QV90SR

1

90mm 50 Metre Antibacterial Radial pipe

QV90P-FS

1

Quiet-Vent 90mm Plenum

QV90-PLEN

4

DUCO Reno MEV Unit

0000-4948

1

DUCO User Controller Wireless

0000-4600

1

Optional Accessories

Description

S&P Fault Indicator

Fixings

Part Number OZEO-FAULT-IND

Qty 1

Radial Ducting MEV Unit & Controls

MEV KIT

DUCO 6 Room MEV KIT

System Capabilities System Type

Multi-Room Extraction System

Number of Rooms

Up to 6 Areas

Installation

New Build/Retrofit/Renovation

Kit Reference

DUCO-6-KIT

Overview

This high-performance 6-room MEV kit features the ultra-quiet DucoBox Silent UK unit with integrated RH (humidity) sensor for intelligent, demand-controlled ventilation. Paired with Quiet-Vent’s crushproof radial ducting, it provides continuous, low-noise extraction from up to six wet rooms—ideal for medium to large homes. The system helps prevent humidity, condensation, and odours while ensuring energy efficient air quality control.

Kit Contents

Description

Part Number

Qty

125mm - Quiet-vent Extract Air Valve PVC

QV-125AVP-E

6

Air Valves

White 125mm PVC Louvred Grill

GPVC125W

1

External Grille

125mm - PVC Pipework x 2 meter

P125-2

1

125mm - PVC Pipe connector

C125

1

Solid Rigid Pipework

Quiet-Vent 125mm TO 90mm Rubber flexible circular duct connector & 2 x clips

QVRC12590

6

FS 90mm sealing ring (90mm) (pack of 10)

QV90SR

1

90mm 50 Metre Antibacterial Radial pipe

QV90P-FS

1

Quiet-Vent 90mm Plenum

QV90-PLEN

6

DucoBox Silent UK + RH Boxsensor* (Silent Basic)

0000-4490

1

DUCO User Controller Wireless

0000-4600

1

Optional Accessories

Description

S&P Fault Indicator

Fixings

Part Number OZEO-FAULT-IND

Qty 1

Radial Ducting MEV Unit & Controls

VENTILATION SOLUTIONS

Explore the Range Discover our curated selection of advanced ventilation solutions, designed to suit a wide variety of homes and projects. From powerful MVHR systems to compact and intelligent MEV units, our range combines high performance, energy efficiency, and quiet operation.

Featured products include the robust BSK Notus, the versatile Mitsubishi VL Series (VL-250, VL-350, VL-500), and the ultra-quiet BSK Zephyr and compact Zephyr Mini—perfect for retrofit or space-conscious applications. We also showcase the intelligent Duco Silent UK with RH sensor and the low-profile DucoBox Reno, both offering sleek, demand-controlled ventilation for modern homes.

Whether you’re designing for new build or retrofit, single-room or whole-house systems, this range ensures reliable air quality, smart control options, and effortless integration.

BSK ZEPHYR

Part Number

SINGLE ROOM MVHR

BSK-ZEPHYR

Technical Specification Heat Recovery Efficiency Airflow Rate Room Area m2 Operation Mode

Overview

The BSK Zephyr is a compact, high-efficiency single-room MVHR unit that recovers up to 90% of heat using a regenerative ceramic core. It runs on a 70-second cycle, alternating between extract and supply to maintain fresh air while preserving warmth. With ultra-quiet operation, low energy use, and built-in Wi-Fi for smart control, it’s ideal for bedrooms, home offices, and living spaces. Its sleek through-wall design makes it easy to install, with no need for central ductwork—perfect for retrofit or space-limited projects.

Dimensions

90% 15-60m3/h 50 Alternating (70s cycle)

Power Consumption

1.4 - 3.1W

Sound Pressure Level

From 3.6 dB(A)

Filters Core Material Mounting

2 x G3 Ceramic Through Wall

Wifi App Control

Yes

Humidity Sensor

Yes

Dimensions H x L (mm) Duct Diameter (mm)

220 x 250-500 160

Country of Manufacture

Turkey

Warranty

2 Years

BSK ZEPHYR MINI

Part Number BSK-ZEPHYR-MINI

SINGLE ROOM MVHR

Technical Specification Heat Recovery Efficiency Airflow Rate Room Area m2 Operation Mode

Overview

The BSK Zephyr Mini is a compact, energy-efficient single-room MVHR unit designed for small spaces like bedrooms and bathrooms. It recovers up to 90% of heat using a ceramic core, cycling between extract and supply every 70 seconds. With low power consumption, quiet operation, built-in Wi-Fi, and humidity sensors, it offers smart, easy ventilation without the need for central ducting. Its slim, through-wall design makes installation simple and ideal for retrofit projects or homes with limited space.

Dimensions

Power Consumption

90% 8-30m3/h 25 Alternating (70s cycle) 1.2 - 3.6W

Sound Pressure @ 3m (dBA)

5 - 29

Filters

2 x G3

Core Material Mounting

Ceramic Through Wall

Wifi App Control

Yes

Humidity Sensor

Yes

Dimensions H x L (mm) Duct Diameter (mm)

180 x 250-500 100

Country of Manufacture

Turkey

Warranty

2 Years

MVHR BSK NOTUS

Part Number

NOTUS/HV/350

Technical Specification Heat Recovery Efficiency %

90%

Airflow Rate Max m3/h

410

Airflow Rate @100 Pa m3/h

375

Max Dwelling Size m2 @.3 ACH

228

Max Room Extraction

8

ERP Rating

A

Dimensions W x H x D (mm)

Overview

The BSK Notus MVHR is a compact, energy-efficient ventilation unit that provides fresh, filtered air while recovering up to 90% of heat from extracted air. Ideal for homes and light commercial spaces, it features EC motors, a high-efficiency heat exchanger, and smart controls for easy setup.

Paired with the Quiet-Vents ducting range, the Notus MVHR ensures quiet, efficient airflow, making it perfect for noise-sensitive areas like bedrooms and living spaces.

Dimensions

500 x 855 x 550

Weight

18kg

Filtration

2 x G4

Pre/Post Heater

Optional

Summer Bypass

Yes, 100%

Frost Protection

Yes

Mounting

Wall or Floor

Ductwork Connections

Top & Bottom

Duct Diameter

125 / 160

Condensate Drain

20mm

Warranty

2 Years

Country of Manufacturer

Turkey

Heat Excahnger

Counterflow

Digital Controller

Yes

Boost Switch Control

Yes

Interactive App Control

Yes

Internal Humidity Control

Yes

Available Room Sensors

No

BMS

Yes

KNX

No

SAP Appendix Q

No

Fireplace mode

No

Alarm System Intergration

No

Passive House

No

MVHR MITSUBISHI VL250

Part Number

VL-250CZPVU-R-E

Technical Specification Heat Recovery Efficiency %

90%

Airflow Rate Max m3/h

331

Airflow Rate @100 Pa m3/h

250

Max Dwelling Size 0.3 Floor Area

150

Max Dwelling Size @ 0.5 ACH (2.4m Ceiling)

130

Max Room Extraction

4

ERP Rating

A+

Dimensions W x H x D (mm)

Overview

The Mitsubishi VL-250 is a compact, energy-efficient MVHR unit that delivers fresh, filtered air while recovering up to 90% of heat. Ideal for homes and small commercial spaces, it features EC motors, automatic summer bypass, and a slim vertical design for easy installation.

When paired with Quiet-Vents ducting, the VL-250 offers quiet, balanced airflow perfect for bedrooms, living areas, and other noise-sensitive spaces.

Dimensions

563 x 595 x 386

Weight

26kg

Filtration

2 x G3

Summer Bypass

Yes

Frost Protection

Yes

Mounting

Wall or Floor

Ductwork Connections

Top

Duct Diameter

125

Condensate Drain

Yes

Warranty

5 Years

Country of Manufacturer

Japan

Heat Excahnger

Counterflow

Digital Controller

Yes

Boost Switch Control

Yes

Interactive App Control

Optional

Internal Humidity Control

No

Available Room Sensors

No

BMS

No

KNX

No

SAP Appendix Q

Yes

Fireplace mode

No

Alarm System Intergration

No

Passive House

No

MVHR MITSUBISHI VL350

Part Number

VL-350CZPVU-R-E

Technical Specification Heat Recovery Efficiency %

90%

Airflow Rate Max m3/h

450

Airflow Rate @150 Pa m3/h

350

Max Dwelling Size 0.3 Floor Area

210

Max Dwelling Size @ 0.5 ACH (2.4m Ceiling)

175

Max Room Extraction

6

ERP Rating

A+

SFP (Lowest)

0.86

Dimensions W x H x D (mm)

Overview

The Mitsubishi VL-350 is a high-performance, energy-efficient MVHR unit designed to deliver continuous fresh air while recovering up to 90% of heat from extracted air. Suitable for larger homes and apartments, it features EC motors, a high-efficiency counterflow heat exchanger, and a vertical compact design that fits easily into cupboards or utility spaces.

Paired with Quiet-Vents ducting, the VL-350 ensures low-noise, balanced airflow making it ideal for bedrooms, living rooms, and open-plan areas.

Dimensions

623 x 658 x 462

Weight

32kg

Filtration

2 x G3

Summer Bypass

Yes

Frost Protection

Yes

Sound Level @3m db.(a) Mounting

13 to 38 Wall or Floor

Ductwork Connections

Top

Duct Diameter

150

Condensate Drain

Yes

Warranty

5 Years

Country of Manufacturer

Japan

Heat Excahnger

Counterflow

Digital Controller

Yes

Boost Switch Control

Yes

Interactive App Control

Optional

Internal Humidity Control

No

Available Room Sensors

No

BMS

No

KNX

No

SAP Appendix Q

Yes

Fireplace mode

No

Alarm System Intergration

No

Passive House

No

MVHR MITSUBISHI VL500

Part Number

VL-500CZPVU-R-E

Technical Specification Heat Recovery Efficiency %

91%

Airflow Rate Max m3/h

630

Airflow Rate @150 Pa m3/h

540

Max Dwelling Size 0.3 Floor Area

320

Max Dwelling Size @ 0.5 ACH (2.4m Ceiling)

285

Max Room Extraction

10

ERP Rating

A+

SFP (Lowest)

0.8

Dimensions W x H x D (mm)

Overview

The Mitsubishi VL-500 is a powerful, energy efficient MVHR unit built to ventilate larger homes and commercial spaces. It delivers high volumes of fresh, filtered air while recovering up to 90% of heat from outgoing air, helping to maintain excellent indoor air quality and energy savings. Featuring EC motors, a counterflow heat exchanger, and a slim vertical design.

When paired with Quiet-Vents ducting, the VL-500 provides quiet, consistent airflow throughout the building ideal for open-plan areas and bedrooms.

Dimensions

623 x 725 x 586

Weight

39kg

Filtration

2 x G3

Summer Bypass

Yes

Frost Protection

Yes

Sound Level @3m db.(a) Mounting

11 to 38 Wall or Floor

Ductwork Connections

Top

Duct Diameter

180

Condensate Drain

Yes

Warranty

5 Years

Country of Manufacturer

Japan

Heat Excahnger

Counterflow

Digital Controller

Yes

Boost Switch Control

Yes

Interactive App Control

Optional

Internal Humidity Control

No

Available Room Sensors

No

BMS

No

KNX

No

SAP Appendix Q

Yes

Fireplace mode

No

Alarm System Intergration

No

Passive House

No

MEV DUCO RENO

Part Number 0000-4948

Technical Specification Airflow Rate @150-pa m3/h Max Room Extraction Dimensions W x H xD (mm) Weight

Overview

5 381-366-204 3.1

Sound Level db.(a)

35-51 dB(A)

Mounting

Wall-FloorCeiling

The DucoBox Reno is a compact, demandDuctwork Connections controlled MEV unit ideal for renovation projects and tight spaces. It extracts stale air from kitchens, Duct Diameter bathrooms, and utility rooms, adjusting airflow Warranty automatically using built-in sensors.

Country of Manufacture With its quiet operation, energy-efficient EC motor, and easy wall-mounted installation, it’s perfect for Controller improving ventilation in existing homes. Paired Boost Switch Control with Quiet-Vents ducting, it delivers silent, efficient Interactive App Control extraction throughout the property.

Internal Humidity Control

Dimensions

325

4 125 2+1* Belgium No No No Yes

Internal CO2 Control

Optional

Available Room Sensors

Optional

BMS

No

KNX

No

SAP Appendix Q

Yes

MEV DUCO SILENT UK

Part Number 0000-4490

Technical Specification Airflow Rate Max m3/h

400

Airflow Rate @150-pa m3/h

400

Max Room Extraction

Overview

Specific Fan Power (lowest)

0.25

Dimensions W x H xD (mm)

480-480-195

Weight The DucoBox Silent is a high-performance, Sound Level db.(a) demand-controlled MEV unit designed for quiet Mounting and efficient ventilation in homes. It adjusts extraction rates based on real-time indoor conditions, making it ideal for kitchens, bathrooms, Ductwork Connections and utility spaces.

Duct Diameter With its quiet operation, energy-efficient EC motor, Warranty and compact design, the DucoBox Silent is well Country of Manufacture suited for both new builds and renovations. When combined with Quiet-Vents ducting, it ensures Digital Controller silent, consistent airflow throughout the property.

Boost Switch Control Interactive App Control

Dimensions

7

Internal Humidity Control

4.3 46.5 dB(A) Wall-FloorCeiling 7 125 2+1* Belgium No Yes No Yes 1 x box

Internal CO2 Control

Optional

Available Room Sensors

Optional

BMS

No

KNX

No

SAP Appendix Q

Yes

DUCTING SOLUTIONS

High Performance Ducting Ducting solutions play a critical role in modern HVAC (Heating, Ventilation, and Air Conditioning) systems by ensuring the efficient distribution of air throughout residential, commercial, and industrial spaces.

These systems are designed to optimize airflow, improve energy efficiency, and maintain indoor air quality.

From flexible ducts for tight spaces to rigid PVC ductwork for largescale operations, a wide range of materials and configurations are available to meet specific project needs.

Advanced ducting solutions may also include insulated or soundattenuated options to enhance comfort and reduce noise.

Proper design, installation, and maintenance of ducting systems are essential for achieving reliable and cost-effective climate control.

Internal Air Valves 125mm - QV Extract Air Valve PVC (White) Product Part Number - QV-125AVP-E Overview - The Quiet‑Vent 125mm PVC Air Extract Valve provides efficient air extraction for residential and commercial ventilation systems. Made from durable PVC, it ensures reliable performance and fits 125mm connections for optimal airflow.

Technical Specifications -

125mm - QV Supply Air Valve PVC (White) Product Part Number - QV-125AVP-S Overview - The Quiet‑Vent PVC 125mm Air Supply Valve delivers smooth, efficient airflow for residential and commercial ventilation. Durable and easy to install, it’s ideal for systems requiring a 125mm air supply.

Technical Specifications -

Ergovent RONDO Flush Mounted Air Valve Round 125mm Product Part Number - RONDO-125 Overview - The Ergovent RONDO Invisible Ceiling Air Valve is a premium, frameless diffuser that blends seamlessly into ceilings, providing quiet, efficient ventilation with a clean, nearly invisible finish.

Technical Specifications -

External Air Valves QV - S/Steel Cowl with Bird Mesh Product Part Number - QV-SSC125M / QV-SSC150M Overview - The Bull Nose Vent combines style and function with a sleek finish and mesh screen to allow airflow while blocking debris and pests.

Available Sizes - 125mm / 150mm Technical Specifications -

UB41 Universal Slate & Tile Terminal C/W Adaptor (Anthracite) Product Part Number - UB41 Overview - Ubbink’s UB41 fits most pitched roofs without matching specific tile types. It includes a 160mm upstand, 500mm Ubiflex skirt, and adaptor for 100– 160mm ducting. It can also terminate soil and vent pipes where no external pressure test is needed.

Technical Specifications -

Rigid PVC Ductwork & Fittings

Diameter (mm)

Free Vent Area (mm ²)

Pressure/Airflow Resistance (Pascals)

100

7850

100m³/h - 7.5 // 225m³/h- 7.5

110

8850

100m³/h - 4.5 // 225m³/h- 16.0

125

12,250

100m³/h - 5.3 // 225m³/h- 24.0

150

17,750

100m³/h - 6.5 // 225m³/h- 31.0

160

18,750

100m³/h - 6.5 // 225m³/h- 31.0

PVC Pipe Connector x 2 Meter Product Part Number - P125-2 / P150-2 Overview - Our range of plastic ducting is UK manufactured with high-grade materials, providing a durable product ideal for both domestic and commercial systems.

Available Sizes - 125mm / 150mm Technical Specifications -

Rigid PVC Ductwork & Fittings PVC Pipe Connector Product Part Number - C125 / C150 Overview - PVC Round Pipe Connectors offer a reliable solution for joining round ducting in domestic and commercial ventilation systems. UK-manufactured to high standards Available Sizes - 125mm / 150mm Technical Specifications -

PVC 90º Bends Product Part Number - B90125 / B90150 Overview - PVC 90º Elbow Bends provide a smooth directional change in round ducting systems and feature a push-fit male end for quick installation.

Available Sizes - 125mm / 150mm Technical Specifications -

PVC 45º Bends Product Part Number - B45125 / B45150 Overview - PVC 45º Round Elbow Bends offer a smooth angled transition in round ducting systems, featuring a push-fit male end for quick installation and compatibility with most leading brands.

Available Sizes - 125mm / 150mm Technical Specifications -

Rigid PVC Ductwork & Fittings PVC T Piece Product Part Number - T125 / T150 Overview - PVC T-Piece Round connectors allow for easy branching in round duct systems, featuring push-fit male ends for fast installation and compatibility with most major brands.

Available Sizes - 125mm / 150mm Technical Specifications -

PVC Reducer 150mm (FM) - 125mm (M) Product Part Number - R150125P Overview - Plastic Ducting Reducers/Adaptors allow easy conversion between duct sizes, ideal for domestic and commercial ventilation systems. UK-manufactured for quality and durability, they feature a rigid design for superior airflow and are compatible with most major brands.

Technical Specifications -

QV Rubber Flexible Circular Duct Connector & 2x Clips Product Part Number - QVRC125 / QVRC150 Overview - The Quiet-Vent Rubber Flexible Circular Duct Connector provides a secure, airtight connection between ducts. Made from durable rubber, it fits various sizes and includes two clips for easy installation. Ideal for all types of ventilation systems.

Available Sizes - 125mm / 150mm Technical Specifications -

Semi Rigid Radial Ductwork QV 125mm To 90mm Rubber Flexible Circular Duct Connector & 2x Clips Product Part Number - QVRC12590 Overview - The Quiet-Vent Rubber Flexible Circular Duct Connector offers a secure, airtight fit for varying duct sizes. Made from high-quality rubber, it includes two clips for easy, reliable installation—ideal for flexible ventilation setups.

Technical Specifications -

FS 75mm - Standard Straight Connector Product Part Number - QVCONSF Overview - The Quiet-Vent 75mm Straight Connector is designed to seamlessly join lengths of 75mm ducting or pipes in ventilation systems. Its durable construction ensures a secure connection for improved airflow efficiency.

Technical Specifications -

FS 90mm Straight Connector (PVC) (90mm) Product Part Number - QVCONST90 Overview - The Quiet-Vent 90mm Straight Connector is designed to provide an easy and quick coupling for 90mm diameter radial ducting systems. It facilitates seamless connections between duct sections for efficient air distribution.

Technical Specifications -

Semi Rigid Radial Ductwork QV Pro 90mm - Radial Pipe Connector Product Part Number - QV90-PRO-PF-CON Overview - The PRO connector is designed to connect two sections of 75mm Radial duct. It enables the use of remaining ends of ventilation ducts or extends a single duct. Built with CLICK system couplers featuring built-in gaskets and snaps for secure duct attachment.

Technical Specifications -

FS 75mm - Standard Quiet-Vent 90º Bend Product Part Number - QVCON90F Overview - The Quiet-Vent 75mm 90° Bend is designed for use with Quiet-Vent and other compatible 75mm radial duct systems. Ideal for creating compact bends in tight spaces, it maintains efficient airflow and system performance. Perfect for confined installations where space is limited.

Technical Specifications -

FS 90mm 90º Bend (PVC) Product Part Number - QVCON9090 Overview - The Quiet-Vent 90mm 90° Bend is designed for use with Quiet-Vent and most other 90mm radial duct systems. It enables sharp turns in tight spaces while maintaining airflow efficiency, making it ideal for flexible, space-saving ducting layouts.

Technical Specifications -

Semi Rigid Radial Ductwork QV 75mm - Standard Sealing Ring (Pack of 10) Product Part Number - QV-75SR Overview - The Quiet-Vent 75mm Sealing Ring is designed for use with Quiet-Vent radial ducting systems.

This sealing ring ensures an airtight seal when installed, preventing leaks and enhancing the efficiency of the system. Each pack contains 10 rings, offering a costeffective solution for multiple installations.

Technical Specifications -

FS 90mm Sealing Ring (90mm) (Pack of 10) Product Part Number - QV90SR Overview - The Quiet-Vent 90mm Sealing Rings are designed to ensure an airtight seal for 90mm round ducting installations. These sealing rings come in a case of 10, providing ample supply for a variety of ventilation system setups.

Technical Specifications -

QV 75mm Plenum Product Part Number - QV75-PLEN Overview - The Quiet-Vent 75mm 90° Plenum is a durable, cost-effective ABS plastic unit for supply or exhaust air. Suitable for floor, wall, or ceiling mounting, it offers flexible installation and reliable performance in various ventilation systems.

Technical Specifications -

Semi Rigid Radial Ductwork QV 90mm Plenum C/W AL Sealing Rings & Metal Clips Product Part Number - QV90-PLEN Overview - The Quiet-Vent 90mm Plenum is a durable, injection-moulded ABS unit designed for 90mm ducting systems. It offers flexible pipe connections and mounting options for easy installation. Ideal for both supply and extract applications, it comes complete with all necessary accessories.

Technical Specifications -

HP Triple 90° PVC Plenum including Sealing Caps Product Part Number - HP75-PLEN-90 Overview - The HeatPex Triple 75mm 90° Plenum facilitates the connection of up to three 75mm ducts to a 125mm supply or exhaust air diffuser. The factoryassembled plenum box comes complete with plugs, gaskets, and everything needed for easy installation, with blanked slots for unused connections.

Technical Specifications -

125mm to 2x75mm Straight Connector / Plenum Product Part Number - QVPLEN75AW Overview - The Quiet-Vent 125mm to 2x75mm Straight Connector links two 75mm ducts to a 125mm duct.

Lightweight and versatile, it features airtight female connectors with gaskets and allows easy wall or ceiling installation. Ideal for supply or extract valves.

Technical Specifications -

Semi Rigid Radial Ductwork QV - 75mm Blanking Blue Cap for Standard Distribution Box Product Part Number - QV-BLANKCAP Overview - The Quiet-Vent 75mm Blanking Cap is designed to cover unused 75mm round spigots in distribution or manifold boxes. It provides a simple and effective solution for sealing off spigots, preventing airflow through unused ports and ensuring system efficiency.

Technical Specifications -

QV 90mm Blanking Blue Caps Product Part Number - QV90-BLANKCAP Overview - The Quiet-Vent 90mm Blanking Cap is designed to cover unused 90mm round spigots in distribution or manifold boxes. It helps to seal off any unused ports, ensuring the efficiency of the ventilation system by preventing unnecessary airflow.

Technical Specifications -

FS 50 Meter Radial Pipe with Antibacterial & Antistatic Lining Product Part Number - QV75P-FS / QV90PFS Overview - The Quiet-Vent 50m Antibacterial Pipe offers quiet, efficient airflow with minimal pressure loss. Fits walls or ceilings, bends to 150mm, and seals best with FS Rings.

Available Sizes - 75mm / 90mm Technical Specifications -

Semi Rigid Radial Ductwork LD 90mm - Radial Pipe Clip Product Part Number - QV90PC Overview - The Quiet-Vent 90mm Radial Pipe Clip securely holds round ducting, reduces noise, and is SAP Appendix Q approved. Interconnectable for flexible installation, clips should be spaced 0.75–1m apart. Sold individually; colors vary by stock.

Technical Specifications -

QV - Manifold Box Clip for Standard Distribution Box Product Part Number - QV-BOXCLIP Overview - The 75mm Clip for Distribution Box is specifically designed for use with all 75mm Quiet-Vent distribution boxes. It ensures a secure and reliable connection, maintaining the integrity of the system and providing easy installation.

Technical Specifications -

QV 6 Pt Top Entry Distribution Box - 150 Spigot (75mm) with 2x Blanking Caps Product Part Number - QV75-06150TE Overview - The Quiet-Vent 6 Point Top Entry Distribution Box distributes airflow in ventilation systems. Suitable for ceiling or floor installation, it connects multiple vents and includes blanking caps for unused outlets.

Technical Specifications -

Semi Rigid Radial Ductwork QV 10 Pt Top Entry Distribution Box - 150 Spigot (75mm) with 3x Blanking Caps Product Part Number - QV75-10150TE Overview - The Quiet-Vent 10 Point Top Entry Distribution Box efficiently distributes airflow to multiple points. Suitable for ceiling or floor installation, it works with Quiet-Vent radial pipes and uses blanking caps for unused vents.

Technical Specifications -

QV 10 Pt Rear Entry Distribution Box - 150 Spigot (75mm) with 3x Blanking Caps Product Part Number - QV75-10150RE Overview - The Quiet-Vent 10 Point Rear Entry Distribution Box offers efficient airflow distribution with 10 connections. Compact and ceiling or floor mountable, it includes three blanking caps for unused vents.

Technical Specifications -

QV 15 Pt Rear Entry Distribution Box - 180 Spigot (75mm) with 4x Blanking Caps Product Part Number - QV75-15180RE Overview - The Quiet-Vent 15 Point Rear Entry Distribution Box delivers efficient airflow for larger systems. Suitable for ceiling or floor installation, it includes four blanking caps for unused vents.

Technical Specifications -

Semi Rigid Radial Ductwork QV 12 Pt Adjustable Top Entry Dist Box - 150 Spigot (75mm) with 3x Blanking Caps Product Part Number - QV75-12150MTE Overview - The Quiet-Vent 75mm 12 Point Adjustable Top Entry Distribution Box features a 150mm spigot and adjustable outlets for flexible duct connections. Ideal for ceiling or floor installation in ventilation systems.

Technical Specifications -

QV 4 Pt Adjustable Top Entry Distribution Box 125 (90mm) Product Part Number - QV90-04125MTE Overview - The Quiet-Vent 90mm 4 Point Adjustable Top Entry Distribution Box features four adjustable outlets and a 125mm spigot for flexible airflow. Suitable for ceiling or floor installation; use sealing rings and blanking caps for airtight performance.

Technical Specifications -

QV 4 Pt Adjustable Rear Entry Distribution Box 125 (90mm) Product Part Number - QV90-04125MRE Overvie w - The Quiet-Vent 90mm 4 Point Adjustable Rear Entry Distribution Box features a 125mm spigot and adjustable outlets for flexible airflow. Suitable for ceiling or floor installation, it includes blanking caps and requires sealing rings for airtight performance.

Technical Specifications -

Semi Rigid Radial Ductwork QV 6 Pt Top Entry Distribution Box 150 Spigot (90mm) with 2x Blanking Caps Product Part Number - QV90-06150TE Overview - The Quiet-Vent 6-Point 90mm Top Entry Distribution Box features a 150mm spigot for efficient airflow. Ideal for ceiling or floor installation, it’s compatible with radial pipe systems and requires sealing rings for airtight performance.

Technical Specifications -

QV 10 Pt Top Entry Distribution Box 180 Spigot (90mm) with 3x Blanking Caps Product Part Number - QV90-10180TE Overview - The Quiet-Vent 90mm 10 Point Top Entry Box offers efficient airflow with ten outlets and a 180mm spigot. Ideal for ceiling or floor installs, it requires sealing rings and blanking caps for airtight performance.

Technical Specifications -

QV 10 Pt Rear Entry Distribution Box 180 Spigot (90mm) with 3x Blanking Caps Product Part Number - QV90-10180RE Overview - The Quiet-Vent 90mm 10 Point Rear Entry Box enables efficient air distribution in ventilation systems. Suitable for ceiling or floor installs, it works with radial pipes and requires sealing rings and blanking caps for airtight performance.

Technical Specifications -

Ductwork Silencers QV - Flexi Insulated Sound Attentuator Product Part Number - QV125F-SILENCER / QV150FSILENCER Overview - The Quiet-Vent Semi Flexible Silencer reduces ventilation noise with a durable, flexible aluminium duct that also prevents condensation.

Available Sizes - 125mm x 500mm / 150mm x 500mm Technical Specifications -

Flexible Ducting Air Plus Insulated Flexi Duct x 10m Product Part Number - IFD125-AP / IFD150-AP Overview - Air Plus insulated flexible ducting delivers high-performance ventilation with superior durability, flexibility, and insulation. Non-allergenic and humidityresistant, it outperforms many imported alternatives.

Available Sizes - 127mm / 152mm Technical Specifications -

Insulation Ductwork 25mm - ODE Foil Back Glass Fibre Insulation Full Roll (1.2m x 18 Meters) Product Part Number - INS25ROLL Overview - This 25mm Foil Backed Glass Fibre Insulation is ideal for insulating ductwork in cold areas. Its highperformance mineral wool with foil facing reduces heat loss and noise, making it perfect for thermal and acoustic insulation.

Technical Specifications Class Rating

0

Width

1.2m

Fire Class

A1

Length

18m

Thermal Resistance at 10°

0.75 (m2K/w)

Thickness

25mm

Thermal Conductivity at 10°

0.032 (w/mk)

Area

21.6m2

EuCEb Certified

Yes

Density

24kg/m3

Our bespoke design service begins with your home’s floorplan drawings - simply send us a digital copy, and we’ll create a personalized ventilation solution tailored to your space and needs.

Bespoke System Design Scan Here