PuroAir 400 HEPA 14 Air Purifier (Black, Large Room)

What makes the HEPA 14 filter different from standard HEPA filters?

The HEPA 14 filter removes 99.99% of particles down to 0.1 microns, compared to standard HEPA 13 filters that capture 99.97% of particles down to 0.3 microns. This means the H14 filter catches smaller particles more effectively, including ultrafine dust, bacteria and some viruses. It's the first commercially available H14 grade filter online that meets ISO standard 29463-3, making it medical-grade quality for home use.

How often do I need to replace the filter?

Filter replacement depends on usage and air quality conditions, but typically ranges from 6-12 months. The unit includes a filter replacement indicator that monitors filter condition and alerts you when replacement is needed. Heavy use in dusty environments or homes with pets may require more frequent changes, whilst clean environments with occasional use can extend filter life. The indicator takes the guesswork out of maintenance timing.

Will this purifier work effectively in my large living room?

Yes, the PuroAir 400 is specifically designed for large spaces up to 2,145 square feet. It can clean this entire area in just 60 minutes with its powerful 80-watt motor and optimised airflow design. For smaller rooms, it will clean the air even faster and more frequently, providing superior air quality. The smart sensor automatically adjusts power based on room size and air quality conditions.

How quiet is this air purifier during normal operation?

The unit operates at just 35dB during normal use, which is quieter than a whisper and suitable for bedrooms, offices, or living areas. Sleep mode reduces noise even further whilst maintaining effective air cleaning. Many users report being able to sleep comfortably with the unit running and the automatic sensor means it only increases speed when needed, returning to quiet operation once air quality improves.

Does the smart sensor really work automatically?

The smart particle sensor continuously monitors air quality and displays real-time status through colour-coded indicators - red for poor air quality, yellow for moderate and green for excellent. When pollutants are detected, the unit automatically increases fan speed to clean the air faster, then returns to normal operation. This happens without any manual intervention, ensuring optimal air quality whilst conserving energy when full power isn't needed.

What specific contaminants does this purifier remove?

The HEPA 14 filter removes 99.99% of particles including dust, pet dander, pollen, mould spores, cigarette smoke, wildfire smoke, volatile organic compounds (VOCs), bacteria and many viruses. It's particularly effective for people with allergies, asthma, or respiratory sensitivities. The medical-grade filtration captures particles as small as 0.1 microns, which includes most airborne allergens and pollutants found in typical home environments.

Is this purifier energy efficient for continuous operation?

Yes, the unit is Energy Star certified, confirming it meets strict energy efficiency standards. It consumes just 80 watts of power, similar to a bright light bulb, making it cost-effective to run continuously. The smart sensor helps conserve energy by automatically adjusting power based on air quality needs. Continuous operation is recommended for maintaining optimal air quality and the low energy consumption makes this practical and affordable.

What controls and features are included?

The purifier includes comprehensive controls: adjustable fan speeds, timer function, sleep mode for quiet night operation, filter replacement indicator and child safety lock. The colour-coded air quality indicator provides instant visual feedback. All controls are simple push-button operation without complex programming. The child lock prevents accidental changes to settings, making it safe for homes with children or pets who might interact with the unit.