Philips AC4014/10

Air Purifier	Make	Philips
	Model	AC4014/10
	Room	Room 1
	Fan Speed	High
Where to buy?	Amazon	Philips AC4014 36-Watt Air Purifier

Test 1

Test Time	Start Date	03/01/2016
	Start Time	23:00

 

Conclusions

• After a four hour struggle, the purifier brought the PM2.5 concentration below 55.5, the unhealthy mark.
• The best the purifier could do was 35.5, which is moderate per EPA standards.
• While AQI was at 400 or more outside, we were able to control it to between 100 and 150 inside using this air purifier.

Notes

• Can you tell when the door to the outside world opened? We could tell simply by the smell of the air, it was so foul.
• At a concentration of about 100, the purifier’s indicator went blue. This is the default setting, and can be changed. This is in line with India’s definition of AQI.

Test 2

Test Time	Start Date	05/11/2016
	Start Time	18:00
	Room	Room 2
	Fan Speed	High

 

Conclusions

Due to the nature of HEPA filters, on high fan speed this purifier will not clean beyond 200.

Test 3

Test Time	Start Date	06/11/2016
	Start Time	09:00
	Room	Room 2
	Fan Speed	Medium

Notes

This was a very interesting test. The purifier was run at medium fan speed for about eight hours. This achieved a PM concentration of 50/50. I then switched the fan to low, hoping to go lower to 30/30. Instead, the PM started rising. Even though the room was closed, there must have been some leakage from outside, since doors and windows in India aren’t exactly built to be airtight. In the night (hour 11 in the graph), the fan was again switched to medium. However, the purifier could not recover its earlier performance of 50/50, instead settling at 200/250. This is probably because PM concentrations are higher outside during the night, and bad air was leaking into the room. I need to study this aspect further. In the morning (hours 23), I pumped the purifier by turning the fan to high, and we were down to 100/100.