Figures & data
Figure 1 Schematic of woodstove, flue, dilution/transit lines, and exposure chamber for conducting inhalation exposures to hardwood smoke. Note that four exposure levels were used, and only one chamber is shown for illustration.
TABLE 1 Summary of exposure atmosphere characterization measurements and measurement conditions
Figure 2 Real-time particle mass concentration during two separate operations of the three-phase burn cycle. Both of these resulted in an average particle mass concentration of approximately 1 mg/m3.
Figure 3 Concentration of total hydrocarbons (THC), carbon monoxide (CO), and several minor components of the wood smoke atmosphere obtained from the High exposure chamber on three separate days. The individual data are averages integrated over a 6-h burn cycle. In general, the trace components showed the most variability in concentration from day to day.
Figure 4 Summary composition (by weight percent) of clean air, and four exposure levels of hardwood smoke.
TABLE 2 Summary of hardwood smoke exposure atmosphere composition
Figure 5 Size-selective chemistry of hardwood smoke sampled from the high exposure level (1 mg/m3 particle mass).
Figure 6 Representative particle number size distribution scans from different points in the burn cycle. In general, smaller particle sizes were observed during high burn (higher oxygen) conditions.
