Evaluating the Effectiveness of a Commercial Portable Air Purifier in Homes with Wood Burning Stoves: A Preliminary Study

Table 2

Home B mean concentrations (particle/m³) measured with the Lighthouse, lower and upper confidence intervals, and percent changes (%).

	Air purifier off			Air purifier on
Particle cutpoint (μm)	Mean concentration (p/m^3)	LCI (p/m^3)	UCI (p/m^3)	Mean concentration (p/m^3)	LCI (p/m^3)	UCI (p/m^3)	Percent change	P value
0.3	26,010,218	16,452,697	41,119,787	4,542,554	2,870,509	7,181,365	−82%	.001
0.5	2,533,976	1,938,451	3,312,786	441,088	337,425	576,655	−83%	.000
1	569,264	423,285	765,588	85,974	63,927	115,636	−85%	.000
2.5	206,282	126,121	337,729	32,663	19,950	53,477	−84%	.000
5	31,351	16,933	58,047	6,039	3,262	11,181	−81%	.002
10
Day	7,347	4,209	12,823	1,621	857	3,072	−78%	.002
Night	1,239	654	2,347	273	157	478	−78%	.002