STACK #261 July 2026

Air Clearing the

TECH FEATURE

visit jbhifi.com.au/stack

What is CADR, and does it matter?

What do all the different filters do? The filter is the heart of any air purifier. Different filter types are designed to tackle different pollutants, and many models combine several for broader coverage. Often considered the gold standard, True HEPA filters can capture at least

Think of CADR as a speed rating for air purifiers. CADR stands for Clean Air Delivery Rate and indicates

how quickly a unit can clean the air in a room. The higher the rating, the faster it can remove particles such as dust, smoke, and pollen. If you live in an area affected by smoke, have pets, or simply want faster air cleaning, CADR is a useful spec to compare.

Are smart features worth paying extra for? They can be, especially if you want your air purifier to do most of the work for you. Many models include built-in air quality sensors that monitor conditions in real time. Colour-coded indicators can show air quality at a glance, while automatic modes adjust fan speed as conditions change. Some models also connect to Wi-Fi, allowing you to monitor air quality, adjust settings, and receive filter replacement reminders via a smartphone app. That means less guesswork and less fiddling with settings, as the purifier can respond automatically when air quality changes. Do air purifiers cost a lot to run? Most modern air purifiers are designed to be energy efficient and can be left running throughout the day without dramatically impacting your power bill. Many people leave them running while they sleep or whenever they're home, so efficiency can make a difference over time. Some models also include sleep modes for quieter overnight operation, while others can double as fans or heaters, making them a versatile year round appliance.

99.97 per cent of particles as small as 0.3 microns, including pollen, dust, and smoke. Carbon filters are designed to tackle

odours and gases. They're particularly useful for homes with pets, cooking smells, or smoke. Some air purifiers can use UV-C light as an additional layer of filtration alongside HEPA f ilters. How do I choose the right size air purifier? Getting the size right is one of the most important parts of choosing an air purifier. A unit that's too small might struggle to clean the air effectively, while an oversized model could cost more than necessary. Most manufacturers provide a recommended room size in square metres. As a general rule, it's better to choose a purifier that covers slightly more space than you need rather than one operating at its limit. For open-plan living areas, remember to factor in connected spaces rather than measuring just one section of the room. Mini purifiers are an ideal fit for bedrooms, offices, desks, and small apartments.

Features worth looking for True HEPA filtration

Carbon filters for odours

Air quality sensors

Auto mode

Quiet or sleep mode

Wi-Fi and app control

Low replacement filter costs

Top tips for getting the best results Run your air purifier regularly, especially when you're home Keep doors and windows closed when possible

Don't block airflow with furniture

Clean or replace filters when recommended

Choose a model that's the right size for your room

50 JULY 2026

jbhifi.com.au