Data used to generate Figures 1-3 and Table 2 in the journal article entitled "Evaluating the Laboratory Performance of Pellet-Fueled Semigasifier Cookstoves" https://doi.org/10.1021/acs.est.4c10008 Figure 1. Box and whisker plots (with jittered points by ISO test phase) of emission factors based on energy delivered (EFd) for particle pollutants (a) fine particulate matter (PM2.5), (b) ultrafine particles (UFP), (c) organic carbon (OC), and (d) elemental carbon (EC). Figure 2. Box and whisker plots (with jittered points by the ISO test phase) of emission factors based on energy delivered (EFd) for gaseous pollutants: (a) carbon monoxide (CO), (b) total hydrocarbons (THC), (c) methane (CH4), and (d) nitrogen oxides (NOx). Figure 3. Emission factors (based on energy delivered) of fine particulate matter (PM2.5) and carbon monoxide (CO) plotted against ISO Tiers for distinct test phases (i.e., power levels) and overall (i.e., mean of phase-averaged) results for all three stoves (a−c). Error bars represent the 90% confidence intervals in the mean. Mean values are also plotted from the literature (d) for lab (L), test kitchen (K), and field (F) studies, as summarized in Tables S16 and S17. Table 1. Summary of Power Level Mean (i.e., Mean of All Stove/Fuel Combinations at a Given Power Level) and Standard Deviations (SD, Here Defined as Standard Deviations of All Stove/Fuel Combination Means at a Given Power Level) of Emission Factors Based on Energy Delivered (EFd) for All Pollutants Excluding Carbon Dioxide (CO2). This dataset is associated with the following publication: Champion, W., G. Shen, C. Williams, L. Virtaranta, M. Barnes, C. Christianson, M. Hays, and J. Jetter. Evaluating the Laboratory Performance of Pellet-fueled Semi-gasifier Cookstoves. ACS ES&T Air. American Chemical Society, Washington, DC, USA, 59(4): 0, (2025).