Table 5.

Comparison of effectiveness of both air purifiers in terms of reducing PM and ions.

	Reduction of PM (%)						Reduction of Anions (%)			Reduction of Cations (%)
	PM0.25	PM0.5	PM1.0	PM2.5	PM5.0	PM10	PM2.5-1.0	PM1.0-0.5	PM0.5-0.25	PM2.5-1.0	PM1.0-0.5	PM0.5-0.25
AP I
General Indoor Air	13	12	21	43	52	52	∼80	30–93	81	ND	43–56	21
Candles and Incense Smoke	53	50	40	34	31	29	81–97	48–92	77–79	82–92	90–97	88–92
AP II
General Indoor Air	64	73	60	37	47	54	27–40	14–38	ND	85–99	20	47
Candles and Incense Smoke	52	60	67	68	67	66	76	33	47	93–99	81–93	149