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Aircon Filter Sheet vs Original Filter: Which Is Better for Split Air Conditioners in Singapore?

March 16, 2026

Air conditioning is part of daily life for many households in Singapore and Malaysia. With the warm climate and high humidity, aircon units often run for many hours each day, and dust, lint, and fine particles accumulate inside quickly. This is why filtration plays such an important role in both air quality and cooling performance.

Every split aircon comes with a built-in original filter. In recent years, aircon filter sheets like Flair have become a popular add-on. So which one actually does the job — and do you need both?

What the Original Filter Does

Every split aircon comes with a built-in reusable filter, typically a plastic mesh, sitting behind the front panel. Its job is simple: stop large dust particles, hair, and debris from reaching the internal components like the evaporator coil.

The catch is that most original filters are coarse. They're built to protect the machine, not to clean the air you breathe. Fine dust, pollen, and haze particles pass straight through the mesh.

What a Filter Sheet Adds

A filter sheet like Flair sits on top of the original mesh filter as an extra layer. Made from PP non-woven material, it's designed to capture the fine particles the original mesh can't — without needing to modify or replace your aircon unit.

Original Filter vs Filter Sheet

	Original Mesh Filter	Flair Filter Sheet
Captures	Large debris, hair, lint	Fine dust, pollen, PM2.5-range particles
Maintenance	Wash every 2–4 weeks	Replace every 1–3 months
Role	Protects the aircon unit	Improves the air you breathe
Installation	Built in, no setup needed	Sits on top of existing filter, under a minute to fit

The two aren't competing products — they do different jobs. The mesh filter protects your aircon hardware. The filter sheet protects your lungs. Used together, you get both.

Does a Filter Sheet Affect Airflow?

This is the most common concern, and a fair one. An overly dense filter sheet can restrict airflow, forcing the aircon to work harder and use more electricity. Flair is engineered to balance filtration with airflow specifically so this isn't an issue — it captures 90% of particles down to 0.3 microns without choking the unit's performance.

Keeping Both in Good Shape

Continue washing your original mesh filter every two to four weeks as usual. Replace your Flair sheet every one to three months, or sooner during haze season or if you have pets. Skipping either step reduces the benefit of the other.

The Bottom Line

For most homes in Singapore and Malaysia, the original filter should stay in place — it's doing a job your aircon still needs. Adding a Flair filter sheet on top is the simplest way to actually improve the air quality in the room, not just protect the machine.

Shop Flair Filters and add real filtration to the aircon you already have.