PSI

Singapore's air quality reached levels understood to be the worst since a new air quality reporting system was implemented in April this year.

Monday's (6 October 2014) 3-hour Pollutant Standards Index (PSI) reading was 153 (Unhealthy) at 7pm.

Everyone may begin to experience health effects; members of sensitive groups may experience more serious health effects. To stay indoors.

http://en.wikipedia.org/wiki/Pollutant_Standards_Index

ATMOSPHERE™ Air Purifier

New approaches to filtration, efficiency, quiet operation and air monitoring – no other air purifier in the market today has the balance of technology and features of the ATMOSPHERE™ Air Purifier.​

The Power to Transform Your Environment is Here.New approaches to filtration, efficiency, quiet operation and air monitoring – no other air purifier in the market today has the balance of technology and features of the ATMOSPHERE™ Air Purifier.
 
The expansive, 99.99% effective CLARUS™ filtration system
The CLARUS filtration system features an activated carbon filter with a surface area large enough to cover 226 football fields or over 17 million square feet. This abundant capacity in addition to the HEPA filter eliminates 99.99% of all airborne contaminants that are drawn into the system, effectively removing pollen, bacteria, dust mites, viruses, smoke, and impurities as small as 0.009 microns.
 
The whisper-quiet efficiency of PUREFLOW™
Quiet operation is as important to the comfort of your home as clean air. The ATMOSPHERE Air Purifier offers you both with the unique PUREFLOW system, which eliminates excessive fan noise by operating only when it is needed. It also reduces energy costs by drawing as little as 4 watts of power – a feature which earns the ATMOSPHERE the ENERGY STAR® rating.
 
The automatic monitoring and protection capabilities of Intelli-Sense
The Intelli-Sense technology makes use of a built-in Particle Sensor to provide an automatic onetouch mode that monitors and protects the quality of your home environment – even when you’re not there. The particle sensor enables the ATMOSPHERE to adjust its speed according to changing air conditions, thus giving you cleaner air in the shortest time.
 
The ATMOSPHERE Air Purifier also automatically monitors the condition of all three filters, and alerts you when they need replacements or cleaning in the case of the Pre-Filter. The monitor calculates filter life based on a combination of operating hours, speed of operation, and levels of contamination.
 
The fast-acting performance of Turbo Power
When you want clean air in a hurry, turn on Turbo Power. With a CADR* (Clean Air Deliver Rate) of 250 cubic feet per minute (7.1 m³/min), it is able to clear the air in a 390-square-foot room within approximately 30 minutes.