Filter pads are one of the most important components in a Bonaire evaporative air conditioner.
They are responsible for absorbing water and cooling the fresh air that enters your home.
Over time, filter pads naturally wear out and become contaminated with dirt, dust, minerals and scale buildup. When this happens, cooling performance can decline significantly.
Understanding when and why Bonaire filter pads need replacement can help maintain efficient operation and improve comfort throughout Perth’s hot summers.
What Do Bonaire Filter Pads Do?
Bonaire evaporative coolers work by drawing warm outside air through wet filter pads.
As the air passes through the pads:
• Heat is absorbed
• Air temperature drops
• Fresh cooled air enters the home
The condition of the filter pads has a direct impact on cooling performance.
Clean pads allow efficient airflow and water distribution, while worn pads restrict performance.
How Bonaire Filter Pads Are Installed
Most Bonaire systems use filter pads that clip into place from the side of the unit.
The pads are secured using a plastic pin fastening system designed specifically for Bonaire coolers.
When replacing pads, it is important that:
• The correct pad type is used
• The retaining pins are fitted correctly
• The pads are seated properly
• Water distribution remains even
Incorrect installation can reduce cooling efficiency and airflow.
Why Filter Pads Need Replacing
Over time, Perth’s mineral-rich water causes scale to build up inside the pads.
The pads can also collect:
• Dust
• Dirt
• Pollen
• Organic debris
• Sludge
As contamination increases, airflow becomes restricted and cooling performance declines.
Eventually the pads become unable to absorb and distribute water efficiently.
At this point replacement is usually the best solution.
Pad Thickness Matters
One factor many homeowners don’t realise is that filter pad thickness can affect system performance.
Different pad thicknesses can influence:
• Airflow
• Cooling efficiency
• Water retention
• System performance
The correct pad thickness depends on:
• The Bonaire model
• Unit design
• Home size
• Airflow requirements
Installing the wrong pad thickness can affect how the system performs.
This is why replacement pads should always be selected carefully.
Signs Your Bonaire Filter Pads Need Replacing
Common warning signs include:
• Reduced cooling performance
• Increased humidity inside the house
• Weak airflow
• Musty smells
• Visible scale buildup
• Damaged or deteriorated pads
• Uneven water distribution
Many homeowners notice the decline gradually over several summers.
A professional inspection can determine whether the pads are still serviceable.
Can Dirty Pads Cause Humidity?
Yes.
One of the most common causes of excessive humidity inside a home is heavily contaminated filter pads.
When airflow becomes restricted by sludge and scale buildup, the cooler may still add moisture to the air without providing effective cooling.
This can create an uncomfortable sticky or humid feeling throughout the home.
Replacing worn pads often restores normal performance.
Can Dirty Pads Increase Running Costs?
While evaporative coolers are generally economical to operate, dirty pads can reduce efficiency.
Restricted airflow forces the system to work harder and may result in:
• Reduced cooling
• Longer operating times
• Poor comfort levels
Keeping filter pads in good condition helps maintain optimal performance.
Why Annual Servicing Helps
The best way to maximise filter pad life is through regular maintenance.
During a service, technicians inspect:
• Pad condition
• Scale buildup
• Water distribution
• Airflow
• General system performance
This allows replacement to be recommended before cooling performance suffers significantly.
Should Filter Pads Be Cleaned Or Replaced?
The answer depends on their condition.
Light contamination may be manageable during routine servicing.
However, heavily scaled, damaged or deteriorated pads generally require replacement.
A technician can assess the condition and advise on the most cost-effective option.
Book A Bonaire Filter Pad Inspection In Perth
If your Bonaire evaporative cooler isn’t cooling as effectively as it used to, worn filter pads could be the cause.
Air Legends services and repairs Bonaire evaporative air conditioners throughout Perth and can inspect, clean or replace filter pads where required.
Contact Air Legends today to arrange a professional inspection and keep your Bonaire system operating at its best.