£9.99

Kair Black 100mm Gravity Wall Vent Grille - 99.5mm / 4 Inch Round Rear Spigot & 155mm Front Cover - Backdraught Prevention Shutter Flaps

Black, DUCVKC243-BK

Price data last checked 16 day(s) ago - will refresh soon

View at Amazon

Price History & Forecast

Last 75 days • 51 data points (No recent data available)

Historical
Generating forecast...
£9.99 £8.89 £9.13 £9.37 £9.61 £9.85 £10.09 18 January 2026 05 February 2026 24 February 2026 14 March 2026 02 April 2026

Price Distribution

Price distribution over 75 days • 2 price levels

Days at Price
49 days 2 days 0 12 25 37 49 £8.99 £9.99 Days at Price

Price Analysis

Most common price: £8.99 (49 days, 96.1%)

Price range: £8.99 - £9.99

Price levels: 2 different prices over 51 days

Key Features

Black Plastic Ducting Air Inlet / Air Outlet with Gravity Shutters. 155mm x 155mm external dimension with 4 inch / 100mm round male rear spigot on the back of the grille for indoor or outdoor use.

Non-return shutter flaps close automatically when not in use. Stops unpleasant odours, noises, or draughts flowing back through your duct. Gravity flap - no need for springs that could break.

Easy to install, just push-fit duct and fittings together. Perfectly suited Bathroom or Kitchen extractor fan, Hydroponics fan, or In-Line Extract Fan.

This grille can be used as a part of a long ductwork run for a variety of purposes including whole house ventilation, passive ventilation, positive input, air conditioning, HVAC, and Heat Recovery Systems.

Suitable to use in compliance with Part F Building Regulations. Airflow performance independently tested by BSRIA or BRE. Free Air: 7200mm2. Static Pressure Drop in Pascals: 15 l/s = 10.94 Pa - 30 l/s = 18.59 Pa - 60 l/s = 24.21 Pa.

Product Specifications

Brand
Kair
Colour
Black
Size
100mm
Format
DIY & Tools
Domain
Amazon UK
Listed Since
19 April 2011

Barcode

No barcode data available

Similar Products You Might Like

Kair Terracotta Gravity Grille 155mm External Dimension Ducting Air Vent with 100mm - 4 inch Round Rear Spigot and Not-Return Shutters
98% match

Kair Terracotta Gravity Grille 155mm External Dimension Ducting Air Vent with 100mm - 4 inch Round Rear Spigot and Not-Return Shutters

Kair

£8.99 31 Jan 2026
Kair Black Louvred Wall Vent Grille 155mm External Dimension with Flyscreen and Round 100mm - 4 inch Rear Spigot
97% match

Kair Black Louvred Wall Vent Grille 155mm External Dimension with Flyscreen and Round 100mm - 4 inch Rear Spigot

Kair

£8.99 01 Feb 2026
Kair Black Louvred Wall Vent Grille 183mm External Dimension with Flyscreen and Round 150mm - 6 inch Rear Spigot
96% match

Kair Black Louvred Wall Vent Grille 183mm External Dimension with Flyscreen and Round 150mm - 6 inch Rear Spigot

Kair

£12.34 31 Jan 2026
Kair White Cowled Outlet Grille 183mm External Dimension Wall Vent with 150mm - 6 inch Round Rear Spigot and Wind Baffle Backdraught Shutter
96% match

Kair White Cowled Outlet Grille 183mm External Dimension Wall Vent with 150mm - 6 inch Round Rear Spigot and Wind Baffle Backdraught Shutter

Kair

£14.99 27 Jan 2026
Kair Terracotta Louvred Wall Vent Grille 155mm External Dimension with Flyscreen and Round 100mm - 4 inch Rear Spigot
96% match

Kair Terracotta Louvred Wall Vent Grille 155mm External Dimension with Flyscreen and Round 100mm - 4 inch Rear Spigot

Kair

£8.54 01 Feb 2026
Kair Brown Louvred Wall Vent Grille 155mm External Dimension with Flyscreen and Round 100mm - 4 inch Rear Spigot
96% match

Kair Brown Louvred Wall Vent Grille 155mm External Dimension with Flyscreen and Round 100mm - 4 inch Rear Spigot

Kair

£8.54 31 Jan 2026
Kair Beige Louvred Wall Vent Grille 155mm External Dimension with Flyscreen and Round 100mm - 4 inch Rear Spigot
95% match

Kair Beige Louvred Wall Vent Grille 155mm External Dimension with Flyscreen and Round 100mm - 4 inch Rear Spigot

Kair

£8.54 31 Jan 2026
Kair White Louvred Wall Vent Grille 155mm External Dimension with Flyscreen and Round 125mm - 5 inch Rear Spigot
95% match

Kair White Louvred Wall Vent Grille 155mm External Dimension with Flyscreen and Round 125mm - 5 inch Rear Spigot

Kair

£9.49 27 Jan 2026
Vents 4 inch Terracotta Gravity Grille Backdraft Shutter 100mm Extractor Fan Back Draught Grill for Air Con Ducting House Bathroom Kitchen Shower Toilet Fans External Vent Plastic Cover
95% match

Vents 4 inch Terracotta Gravity Grille Backdraft Shutter 100mm Extractor Fan Back Draught Grill for Air Con Ducting House Bathroom Kitchen Shower Toilet Fans External Vent Plastic Cover

VENTS UK

£8.99 28 Jan 2026
Vents 4 inch 100 mm Black Plastic Fixed Blade Grille with Fly Mesh 4 inch Rear Spigot for Internal External Air Vent Cover Wall Ceiling Mounting Louvre Grill Insect Screen Bathroom Ventilation
94% match

Vents 4 inch 100 mm Black Plastic Fixed Blade Grille with Fly Mesh 4 inch Rear Spigot for Internal External Air Vent Cover Wall Ceiling Mounting Louvre Grill Insect Screen Bathroom Ventilation

VENTS UK

£8.99 26 Jan 2026
Kair 90 Degree Elbow Bend 150mm - 6 inch Round Plastic Ducting Joint to Connect Round Duct Pipe or Flexible Hose
94% match

Kair 90 Degree Elbow Bend 150mm - 6 inch Round Plastic Ducting Joint to Connect Round Duct Pipe or Flexible Hose

Kair

£12.99 01 Dec 2025
Kair Ducting Adaptor 204mm x 60mm to 100mm - 4 inch Rectangular to Round Straight Channel Connector for Converting to Different Size Duct Systems
94% match

Kair Ducting Adaptor 204mm x 60mm to 100mm - 4 inch Rectangular to Round Straight Channel Connector for Converting to Different Size Duct Systems

Kair

£10.99 01 Feb 2026
Kair Ducting Adaptor 234mm x 29mm to 100mm - 4 inch Rectangular to Round Straight Channel Connector for Converting to Different Size Duct Systems
94% match

Kair Ducting Adaptor 234mm x 29mm to 100mm - 4 inch Rectangular to Round Straight Channel Connector for Converting to Different Size Duct Systems

Kair

Out of Stock 01 Feb 2026
H&C VENT Grey Gravity Grille 190mm 125mm Connector - Insect Guard
93% match

H&C VENT Grey Gravity Grille 190mm 125mm Connector - Insect Guard

H&C VENT

Out of Stock 06 Feb 2026
Kair Elbow Bend Adaptor 110mm x 54mm to 100mm - 4 inch Rectangular to Round 90 Degree Bend Adapter for Converting to Different Size Plastic Ducting Systems - Female
93% match

Kair Elbow Bend Adaptor 110mm x 54mm to 100mm - 4 inch Rectangular to Round 90 Degree Bend Adapter for Converting to Different Size Plastic Ducting Systems - Female

Kair

£8.99 10 Mar 2026
Kair 90 Degree Elbow Bend 125mm - 5 inch Round Plastic Ducting Joint to Connect Round Duct Pipe or Flexible Hose
93% match

Kair 90 Degree Elbow Bend 125mm - 5 inch Round Plastic Ducting Joint to Connect Round Duct Pipe or Flexible Hose

Kair

£9.99 01 Feb 2026
2 x 100mm Backdraught Shutter Flap 4-inch Non-Return Valve Damper Flap to Connect Duct Pipe or Flexible Ducting Hose Backdraft Cold Air Stopper
93% match

2 x 100mm Backdraught Shutter Flap 4-inch Non-Return Valve Damper Flap to Connect Duct Pipe or Flexible Ducting Hose Backdraft Cold Air Stopper

NESVENT

£9.99 04 Feb 2026
Ø 125mm / 5'' Cowled Duct Cover with Gravity Flap - Ventilation Grille with Rain and Wind Protection - External Air Vent Covers - ABS Plastic Grey
93% match

Ø 125mm / 5'' Cowled Duct Cover with Gravity Flap - Ventilation Grille with Rain and Wind Protection - External Air Vent Covers - ABS Plastic Grey

EUROPLAST

£13.69 27 Jan 2026
Kair Connector with Backdraught Shutter 100mm - 4 inch Non-Return Damper Flap to Connect Duct Pipe or Flexible Ducting Hose
93% match

Kair Connector with Backdraught Shutter 100mm - 4 inch Non-Return Damper Flap to Connect Duct Pipe or Flexible Ducting Hose

Kair

£7.99 01 Feb 2026
Vent Systems 100 mm / 4" Inch (Opening Dimensions) - Pack of 50 - Black Soffit Vent Cover - Plastic Round Air Vent Grille - Built-in Mesh Screen - HVAC Register Louver for Bathroom, Home, Kitchen
93% match

Vent Systems 100 mm / 4" Inch (Opening Dimensions) - Pack of 50 - Black Soffit Vent Cover - Plastic Round Air Vent Grille - Built-in Mesh Screen - HVAC Register Louver for Bathroom, Home, Kitchen

Vent Systems

£99.98 21 Jan 2026
Kair Connector with Backdraught Shutter 125mm - 5 inch Non-Return Damper Flap to Connect Duct Pipe or Flexible Ducting Hose
93% match

Kair Connector with Backdraught Shutter 125mm - 5 inch Non-Return Damper Flap to Connect Duct Pipe or Flexible Ducting Hose

Kair

£9.99 01 Feb 2026
Ø 125mm / 5'' Cowled Duct Cover with Gravity Flap - Ventilation Grille with Rain and Wind Protection - External Air Vent Covers - ABS Plastic White
93% match

Ø 125mm / 5'' Cowled Duct Cover with Gravity Flap - Ventilation Grille with Rain and Wind Protection - External Air Vent Covers - ABS Plastic White

EUROPLAST

£9.90 01 Feb 2026
Kair Plastic Ducting Pipe 100mm - 4 inch / 1.5 Metre Long Length - Rigid Straight Duct Channel
92% match

Kair Plastic Ducting Pipe 100mm - 4 inch / 1.5 Metre Long Length - Rigid Straight Duct Channel

Kair

Out of Stock 01 Feb 2026
H&C VENT White Ventilation Grille with Slider and Insect Protection 6 x 6Inch / 150 x 150mm │ Vent Cover │ Extractor Air Vent Covers for Inside and Outside use │ Pipe Covers for Wall Door Window
92% match

H&C VENT White Ventilation Grille with Slider and Insect Protection 6 x 6Inch / 150 x 150mm │ Vent Cover │ Extractor Air Vent Covers for Inside and Outside use │ Pipe Covers for Wall Door Window

H&C VENT

£8.99 27 Jan 2026