When haze returns to Singapore, many homeowners close their windows and switch on their air conditioners to stay cool indoors. But can your aircon actually protect you from haze? While an air conditioner helps keep your home comfortable, it does not necessarily remove the fine particles that make haze harmful.
Understanding how your aircon works, when to use an air purifier, and how to maintain your system can help you manage indoor comfort during Singapore’s haze season.
Can Aircon Filter Out Haze Particles?
The short answer is: not completely.
Most residential split-unit air conditioners in Singapore are designed primarily to cool indoor air and circulate it around your room. Their built-in mesh filters capture larger particles such as dust, hair and some debris, helping to keep the aircon’s internal components cleaner.
However, these standard filters are generally not designed to remove the tiny airborne particles associated with haze. The main pollutant of concern during haze episodes is PM2.5, which are fine particulate matter measuring 2.5 micrometres or smaller. These particles can enter indoor spaces through gaps, openings and certain ventilation systems.
According to Singapore’s National Environment Agency (NEA), haze particles can enter air-conditioned buildings, potentially causing indoor pollution levels to rise. Therefore, running your aircon should not be treated as a substitute for proper air filtration.
Is It Safe to Use Aircon During Haze in Singapore?
Yes, you can generally continue using your air conditioner during haze to keep your home cool and comfortable. NEA advises that fans and air conditioners may be used for circulation and cooling during haze episodes.
However, the way your system is designed matters. Most wall-mounted split-unit air conditioners recirculate the air already inside the room rather than drawing in large amounts of outdoor air. If your system has an outdoor-air intake, such as certain window-mounted units, follow the relevant guidance and close the intake when outdoor air quality is poor.
Here are three practical steps to take during hazy conditions:
- Keep windows and doors closed when outdoor air quality worsens. This helps reduce the amount of haze entering your home.
- Use an air purifier where appropriate. A suitable purifier can help remove fine airborne particles that your aircon’s standard filter may not capture.
- Monitor official haze updates. Check NEA’s air quality readings and health advisories to decide when to limit outdoor activities.
Remember that closing windows reduces natural ventilation. When outdoor air quality improves, open your windows and doors to refresh the indoor air.
Aircon vs Air Purifier: Which Is Better During Haze?
An air conditioner and an air purifier serve different purposes. Your aircon controls temperature and humidity, while an air purifier is specifically designed to clean indoor air.
For haze protection, consider the following differences:
Air conditioner: Helps maintain a comfortable indoor temperature and circulates air. Its standard mesh filter is not usually sufficient to remove PM2.5 effectively.
Air purifier: Uses dedicated filtration to remove airborne particles. For haze, look for a model with a high-efficiency filter, such as a HEPA filter, and a suitable Clean Air Delivery Rate (CADR) for your room size.
NEA recommends choosing an air purifier based on the room’s size and the device’s particle-removal performance. A purifier that is too small for the room may not clean the air effectively.
For many households, using an aircon together with a suitably sized air purifier is a more practical approach: the aircon keeps the room cool, while the purifier helps reduce airborne particles.
Should You Service Your Aircon More Frequently During Haze Season?
Regular aircon maintenance remains important during haze season, although haze does not automatically mean that your system needs a chemical wash.
Over time, dust and other debris can collect on the air filter, evaporator coil and blower. Dirty components may restrict airflow, reduce cooling performance and contribute to unpleasant smells. A clogged filter can also make your system work harder to circulate air.
To keep your aircon in good condition during Singapore’s haze season:
1. Clean the air filters regularly. Follow the manufacturer’s instructions and cleaning schedule, checking them more often if they become visibly dirty.
2. Check for weak airflow. Reduced airflow or uneven cooling may indicate a dirty filter or another maintenance issue.
3. Watch for unusual smells or water leaks. These symptoms may require a professional inspection.
4. Arrange servicing when necessary. A technician can inspect the filters, blower and evaporator coil and recommend cleaning based on their actual condition.
It is important to remember that servicing your aircon is not the same as purifying your indoor air. Even a well-maintained air conditioner may not remove fine haze particles effectively.
How to Improve Indoor Air Quality During Haze
Besides using your aircon and air purifier appropriately, a few simple habits can help reduce your exposure to haze particles at home.
- Avoid smoking, burning candles or using other products that create unnecessary indoor pollutants.
- Use a damp cloth to wipe surfaces and mop floors, rather than dry-dusting, which can stir settled particles back into the air.
- Keep doors and windows closed while outdoor air quality is poor, and reopen them when conditions improve.
- Choose an air purifier with appropriate filtration and capacity for the room.
- Follow NEA’s health advisories, particularly if you have children, elderly family members or household members with chronic heart or lung conditions.
If anyone at home feels unwell during a haze episode, seek medical advice when appropriate.
Keep Your Home Comfortable with Proper Aircon Maintenance
Your air conditioner plays an important role in keeping your home cool during Singapore’s hot and hazy weather, but it should not be relied on as your only defence against haze. Combining sensible indoor habits with a suitable air purifier can help you manage indoor particle levels more effectively.
If your aircon has weak airflow, unusual smells, water leaks or reduced cooling performance, Infinity Air can help inspect your system and recommend suitable servicing based on its condition. With over 20 years of experience and more than 15,000 servicing jobs, our team helps Singapore homeowners keep their air-conditioning systems running smoothly.
Contact Infinity Air via WhatsApp 9383 6574 to arrange an aircon inspection or servicing and keep your home comfortable throughout haze season.
