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

Table 1

Home A 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	21,921,972	15,294,441	31,421,408	7,579,820	5,288,261	10,864,379	−65%	.000
0.5	2,006,696	1,317,175	3,054,114	684,881	477,825	2,006,696	−66%	.001
1	257,043	169,058	390,819	96,858	63,768	147,267	−63%	.003
2.5
Day	67,643	43,783	104,402	26,716	17,309	41,274	−61%	.002
Night	30,577	19,791	47,193	12,076	7,824	18,657	−61%	.002
5
Day	14,827	10,451	21,034	5,530	3,898	7,846	−63%	.000
Night	4,565	3,218	6,476	1,703	1,203	2,416	−63%	.000
10
Day	2,502	1,895	3,616	973	673	1,405	−61%	.000
Night	652	452	942	253	176	366	−61%	.000