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$30.99
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Home/DIY & Tools/Building Supplies/Heating & Cooling/Registers, Grilles & Vents
Vent Systems 100 mm / 4 Inch Circular Air Diffuser – Round Adjustable Air Vent for Exhaust, Intake, HVAC Ventilation – Black Plastic Bathroom, Kitchen, Shed Duct Vent Cover for Ceiling or Wall — image 1
Registers, Grilles & VentsVent Systems✓ In stock

Vent Systems 100 mm / 4 Inch Circular Air Diffuser – Round Adjustable Air Vent for Exhaust, Intake, HVAC Ventilation – Black Plastic Bathroom, Kitchen, Shed Duct Vent Cover for Ceiling or Wall

★★★★★
$30.99

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2 available
Size: 100 mm / 4 Inch
100 mm / 4 Inch100 mm / 4 Inch150mm / 6 inch150mm / 6 inch
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About this item
  • FITS STANDARD 100 MM / 4” DUCTS – Designed for ceiling or wall installation in HVAC systems, this circular air vent ensures balanced airflow for both exhaust and intake ventilation setups.
  • ADJUSTABLE AIRFLOW CONTROL – The rotating centre plate allows precise manual regulation of air output. Perfect for maintaining comfort and energy efficiency in any room.
  • DURABLE PLASTIC CONSTRUCTION – Made from heavy-duty black plastic resistant to heat, moisture, and corrosion. Retains a smooth finish and modern look even in bathrooms or kitchens.
  • EASY INSTALLATION – Pre-drilled flange design enables quick mounting to round ducts using screws. Simple align-and-secure setup with no professional tools required. (SCREWS NOT INCLUDED)
  • VERSATILE USE – Ideal for ventilation in homes, offices, sheds, and workshops. Suitable for HVAC ducting, wall vents, soffits, and air circulation projects where clean design meets reliable performance.
Product details
Brand
Vent Systems
Manufacturer
Vent Systems
Material
Plastic
Colour
Black
Size
100 mm / 4 Inch
EAN
4752277011901

Customer reviews

What customers say about Bigamart

10 Trustpilot reviews total, with 2 shown at a time.

Trustpilot
★★★★★
Excellent
4.5 average rating
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S
Sigalit
🇮🇱 · January 2026
★★★★★

I wrote to Bigamart's customer support and they accompanied the process of reshipping the item until it finally arrived. I felt a genuine effort to solve the problem till it was finally solved.

V
Verified buyer
🇦🇺 · November 2025
★★★★★

The package was here in Australia from England in a few days — so quick! Something was missing and they refunded it straight away. Pretty happy with these guys.

Showing 1–2 of 10 reviews

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