How do you fit them because i'm totally useless at diy?

Hi. The part with the lift up flap goes on the inside of the window frame and the larger grill part goes on the outside of the frame. I drilled a series of holes along the line of where I fitted the vent to provide the airflow using a very sharp new drill.

Do these go on the window or above on the frame?

They can go on either, but the frame is best

1. Should the flap open up or downwards? 2. How often/long should they be open for to stop the condensation/damp please?

Flap hinge should be at the top and the flap open upwards. Mine are left open permanently and effectiveness is dependent on size of room, size of window and the temperature / humidity of the environment.

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Window Trickle Slot Vent 407mm White for uPVC Double Glazing & Timber Windows Reduces Condensation, Damp & Steam in Windows Fully Adjustable

Window Trickle Slot Vent 407mm White for uPVC Double Glazing & Timber Windows Reduces Condensation, Damp & Steam in Windows Fully Adjustable

Product ID: 55056361

🏠Compatible with uPVC, timber & aluminium

🌬️3728 mm² airflow area

🛠️Easy fit with included screws & parts

€ 23.61

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Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🌬️ Elevate your space with fresh airflow — don’t let dampness cramp your style!

ROBUST RELIABLE - Heavy-duty construction built to replace existing vents and last for years
BREATHE EASY LIVE BETTER - Reduces condensation, damp & mould for a healthier home environment
PRECISION AIRFLOW CONTROL - Fully adjustable vent slot ensures optimal ventilation tailored to your needs
TESTED TRUSTED PERFORMANCE - Airflow tested to BS EN 13141-1:2004 standards for guaranteed quality
UNIVERSAL FIT EFFORTLESS INSTALL - Designed for uPVC, timber, and aluminium windows & doors with all parts included

The Window Trickle Slot Vent 407mm White is a high-performance ventilation solution designed for uPVC, timber, and aluminium double-glazed windows. With a substantial 3728 mm² airflow area, it effectively reduces condensation, damp, and mould. Fully adjustable and easy to install with included parts, this heavy-duty vent meets BS EN 13141-1:2004 airflow standards, ensuring reliable, long-lasting performance for a healthier, fresher home.

Specifications

ASIN	B017NYDCCI
Batteries Required?	No
Batteries included?	No
Best Sellers Rank	37,922 in DIY & Tools ( See Top 100 in DIY & Tools ) 11 in Window Ventilators
Colour	White
Customer Reviews	4.4 4.4 out of 5 stars (2,177)
Date First Available	6 Nov. 2015
Guaranteed software updates until	unknown
Item Package Quantity	1
Item Weight	81.6 g
Item model number	MJ 4000
Manufacturer	Draak
Part Number	MJ 4000
Product Dimensions	40.59 x 3.91 x 1.6 cm; 81.65 g
Size	407mm

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€ 23.61

Duties & taxes included

In stock

Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Croatia.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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4 days ago

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Excellent communication throughout the order process. Product is perfect.

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