Louvre Window — Best Ventilation Solution for Kitchen & Bathroom

Louvre Window: Best Ventilation

A louvre window (jalousie window) is made up of several glass blades that can be opened at an angle. It gives you continuous ventilation, even while it is raining. Older Malaysian homes will recognise it as the "naco" window, the same idea now built with an aluminium frame, tighter blade seals and a proper lock. In a climate where the kitchen is hot for most of the day and the bathroom never fully dries out, a window that can stay open through a monsoon downpour is a practical advantage that no sliding or casement window can match.

Benefits of Louvre Windows

1. Continuous Ventilation

The glass blades open at any angle from 0-90 degrees, letting fresh air flow in continuously. Hot air rises and escapes through the top blades while cooler air enters lower down, so a louvre window keeps a room moving even without a fan.

2. Rain-Proof While Open

Unlike other windows, an aluminium louvre window can be left open when it rains. The angled glass blades stop rainwater from getting in. During the November to March monsoon on the East Coast, or the daily afternoon storms in the Klang Valley, this means you are not running to shut the kitchen window every time the sky darkens.

3. Privacy

The angled glass blades give you privacy from outside while still letting light and air in. For terrace houses where the bathroom window faces the neighbour's wall a metre away, frosted blades add a second layer of privacy. Compare this with a casement window, which has to be fully shut for privacy and then stops all airflow.

4. Ventilation Control

You can control how much air comes in by adjusting the blade angle, from just a little to fully open. Close the blades fully when the aircond is running and open them wide when you are cooking.

Where Does It Suit?

• Kitchen: clears cooking smoke and smells
• Bathroom: reduces humidity and prevents mould
• Staircase: ventilation for walkways
• Laundry room: dries clothes faster
• Garage: ventilation for vehicles

Louvres are also common on the rear wall of the wet kitchen in a double-storey terrace, on condo yard areas that need ventilation but sit above a drop, and on the side walls of a semi-D where a full sliding window would open directly onto the neighbour.

Types of AluFrame Louvre Windows

Standard Louvre:

• 5mm glass blades
• Manual handle
• From RM200/unit

Security Louvre:

• Glass blades + security grille
• Key lock
• From RM300/unit

Motorized Louvre:

• Electric control
• Automatic rain sensor
• From RM500/unit

All three come with the same 10-year warranty on the aluminium profiles and 5-year warranty on accessories, which covers the handle, lock and motor. The frame can be powder coated in any of 20+ colours (from RM280/unit) to match the rest of the house, and tinted blades (add RM20-40/unit) help on a west-facing kitchen wall. Because a louvre is a small unit, it is often ordered alongside larger sliding windows (from RM180/unit) in the same colour so the whole facade matches.

Worked Example: Wet Kitchen And Two Bathrooms

A typical ventilation refresh for a double-storey terrace house in Selangor looks like this:

Location	Type	From
Wet kitchen, rear wall	Security louvre, 2ft x 4ft	RM300/unit
Ground-floor bathroom	Standard louvre, frosted blades	RM200/unit
Master bathroom	Standard louvre, frosted blades	RM200/unit
Installation	3 units	RM50-100/unit

That is a starting budget of RM850-1,000 for three units, and a job of this size is finished in a single day. If you are replacing old naco windows, removal of the existing frames is included in the price. For a full comparison of louvre against other window types, see our aluminium window price guide for Malaysia.

Installation Tips

• Install on the wall that faces the prevailing wind
• Make sure the size is big enough for effective ventilation
• For bathrooms, choose frosted glass for privacy
• For kitchens, place it near the cooking stove

A ground-floor louvre facing a back lane should be the security version. Louvres are often the first target for break-ins because individual blades can be lifted out of a cheap frame, which is why AluFrame's security louvre pairs the blades with a grille and a key lock. Read more in our window safety guide for homes with children.

What To Check Before You Order

• Measure the wall opening with a free site survey rather than guessing. Louvre frames are usually 2ft wide, so a wide opening may need two units side by side.
• Decide whether the window is on the ground floor or facing a lane. If yes, order the security louvre from RM300/unit.
• Pick frosted blades for bathrooms and clear or tinted blades for kitchens.
• Check strata rules if you are in a condo. Some buildings restrict blade colour and external frame colour.
• Confirm that AluFrame installs in your state through the aluminium window installation locations hub.

Conclusion

A louvre window is the simplest way to keep a Malaysian kitchen or bathroom dry, ventilated and private without depending on an exhaust fan. With standard units from RM200/unit, security units from RM300/unit and motorized units from RM500/unit, there is an option for every budget and every room. In coastal towns such as Penang or Kuantan, ask for a marine-grade powder coat so the salt air does not dull the frame over time.

WhatsApp AluFrame for a louvre window quote. You will get a free site survey and a written quote within 24 hours.