Air purifier buying guide: 10 things you need to know for a cleaner home atmosphere

Before shopping, it’s important to identify why you need an air purifier. (Image: Canva)

Whether you are concerned about allergies, or asthma, or want to ensure the air in your home is clean, selecting the right air purifier can make a big difference to the health of your family. However, with so many options available, how do you know which one is the best fit for you? This guide will walk you through the key factors to consider when purchasing an air purifier.

Determine your needs

Before shopping, it’s important to identify why you need an air purifier. Are you aiming to reduce allergens like dust, pollen, and pet dander? Or are you more concerned about removing harmful particles such as smoke, mould, and bacteria? Understanding your primary concern will guide you in selecting a purifier that’s tailored to address those specific issues.

Choose the right filter type

HEPA filters: These are the gold standard, capturing 99.97% of particles as small as 0.3 microns. If allergies or asthma are a concern, choose a purifier with a true HEPA filter.

Activated carbon filters: Ideal for eliminating odours, smoke, and VOCs (volatile organic compounds), these filters absorb harmful gases, making them perfect for homes with smokers or pets.

UV-C light: Used to kill bacteria and viruses, UV-C technology is best when paired with other filtration methods, as it doesn’t remove particles from the air.

Ionic filters: Ionic purifiers release negative ions to settle particles out of the air. However, they may produce ozone, which can be harmful to respiratory health.

Match the room size

Air purifiers are designed to work within specific room sizes, so be sure to pick one that suits the room you plan to use it in. Larger rooms need higher-capacity purifiers, while smaller rooms can use compact models.

Check the clean air delivery rate (CADR)

CADR measures how efficiently an air purifier can clean the air in a given space. It’s measured in cubic feet per minute (CFM) and indicates how quickly the purifier can filter smoke, pollen, and dust. A higher CADR means faster air purification, so aim for a model with a CADR that matches your room size.

Also see: Want a workspace that feels like home? Here’s how to design for everyone’s needs

Consider noise levels

Check the decibel (dB) rating—lower numbers mean quieter operation. Some purifiers come with multiple speed settings, allowing you to choose a quieter mode when necessary.

Factor in maintenance and filter costs

Air purifiers require regular maintenance, especially filter replacements. HEPA and carbon filters typically need to be replaced every 6–12 months, depending on usage. Be sure to check the cost and availability of replacement filters, as this will be an ongoing expense.

Energy efficiency matters

Since air purifiers often run for extended periods, energy efficiency is crucial. Look for units that are Energy Star certified to ensure they consume less electricity, which can lower both your carbon footprint and energy bills.

Look for additional features

Modern air purifiers come with features that enhance convenience and performance:

Smart connectivity: Some models can be controlled via smartphone apps, allowing you to monitor air quality and adjust settings remotely.

Air quality sensors: These automatically adjust the purifier's operation based on detected air quality, providing optimal performance without manual adjustments.

Timers and sleep modes: A timer allows you to run the purifier for specific durations, while sleep mode dims lights and reduces noise for a quieter experience.

Portability: If you plan to move the purifier between rooms, opt for a lightweight unit or one with handles or wheels for easy transport.

Consider your budget

Air purifiers range from affordable to high-end models with advanced features. While it’s tempting to go for the cheapest option, balancing cost with quality is key. A higher-quality unit may offer better performance and durability, saving you money in the long term.

Read reviews and ratings

Before making a decision, check customer reviews and ratings. This can provide insight into the purifier's real-world performance and any potential issues with noise, maintenance, or filter replacements.

Air purifiers have become an essential need in our homes nowadays. By understanding your needs and doing your research, you can find an air purifier that will help you and your family breathe easier.