Window jalousies, also known as louvers or louvered windows, are a popular feature in Hawaii due to their unique design and ability to provide natural ventilation.

While these windows offer benefits such as increased airflow and a connection to the outdoors, they can also have a significant impact on cooling efficiency.

In this blog post, we will explore the effects of window jalousies on cooling in Hawaii, discuss their popularity, and provide recommendations for improving cooling efficiency in homes with window jalousies.

The Popularity of Window Jalousies in Hawaii

Window jalousies are prevalent in Hawaii due to their suitability for the tropical climate.

The adjustable slats allow homeowners to control the amount of airflow, allowing the natural breeze to flow through the house.

This feature is highly desirable in Hawaii, where residents often seek to embrace the island's pleasant climate and reduce reliance on air conditioning.

Limitations of Window Jalousies for Cooling Efficiency

While window jalousies provide ventilation, they can also contribute to heat gain and reduce cooling efficiency.

The open slats allow sunlight to enter the room, increasing solar heat gain and potentially making the space warmer.

Additionally, the airflow provided by jalousies may not be sufficient during periods of high humidity or when the outside temperature is excessively hot.

Air Leakage

One of the significant drawbacks of jalousie windows is their tendency to allow air leakage.

These windows were designed to facilitate air and wind flow, primarily in warm climates. Since jalousies originated in 1901, long before the widespread adoption of air conditioning in the 1950s, insulation was not a primary consideration.

As a result, jalousie windows lack rubber seals or any form of insulation, leading to potential cracks not only in the window slats but also in the metal frames.

Fixes and Recommendations

To improve cooling efficiency in homes with window jalousies, several solutions are available, catering to different budgets and preferences:

Window Coverings

Installing curtains, blinds, or shades can help block sunlight and reduce solar heat gain. Opt for light-colored coverings that reflect heat rather than absorb it.

Jalousie Window Covers

Specialized covers designed for window jalousies can be installed to provide insulation and prevent heat transfer. These covers are available in various materials, such as reflective films or insulating panels.

Upgrading Windows

Consider replacing window jalousies with more energy-efficient window options, such as double-pane or low-emissivity (low-E) windows. These windows provide better insulation and reduce heat transfer.

Conclusion

Window jalousies are a popular choice in Hawaii due to their ventilation benefits, but they can affect cooling efficiency.

Understanding the impact of window jalousies on cooling and implementing appropriate solutions is crucial for maintaining comfortable indoor temperatures and reducing energy consumption.

By combining simple fixes like window coverings with more substantial upgrades like window replacements, homeowners in Hawaii can optimize cooling efficiency while still enjoying the benefits of natural ventilation provided by window jalousies.

Remember, when considering any modifications to your windows, consult with a professional to ensure the best results for your specific home and needs.