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Home / Ducting & Accessories / Four Inch - 100mm Ducting, Grilles & Accessories

4 Inch 'No Resist' Brown Energy Saving Back Draught Grille

Product Description

The Tornado Energysaver cowl is one of the most effective external grilles available. It counteracts the detrimental effects caused by wind which dramatically affects the extraction and performance levels of extractor fans. In turn it makes the fan more energy efficient compared to standard fixed or gravity grilles.

Whilst increasing performance it also helps eliminate back draughts which are common when a fan is switched off. We recommend the use of duct clamps with all ducting and grilles.

Please note that these grilles are not suitable for a soffit installation.

Dimensions
Width: 149mm
Height: 149mm
Spigot Diameter: 98mm

Specifications

Brand

Tornado

Product Code

NVT ESG4BR

Customer reviews

(3 Customer reviews)

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5 Stars

33%

4 Stars

67%

3 Stars

2 Stars

1 Stars

Would be better...

...with a longer neck for attaching the ducting (think it's called a spigot) which is only 20mm - should be around 35-40mm. I have not actually installed it so far (I need to re-route ducting) but it seems to be well made.

Jas | Croydon | August 2025

Quality looks good Not fitted it yet but lt looks robust not flimsy Time outside on wall will tell !

Nice if it was cheaper !

Trevor Williams | Shropshire | June 2024

Great alternative to the usual options Verified Purchase

Much better than our previous gravity flap vent as this design does not provide any resistance unlike the gravity flap design yet we do not get any issues with a back draught either, great design and build quality.

Christopher | West Midlands | November 2023

Description