1. Ms. Frizzle, Science Teacher
Combustion of Different Wood Species in Woodstoves and Their Effect on the Indoor PM2.5
Jane Doe and John Smith
Jefferson High School
Ms. Frizzle, Science Teacher

2. Introduction
Question- Is there a significant difference in indoor PM2.5 levels for the different wood species burned in wood stoves?
Hypothesis- There will be a significant difference in PM2.5 of the various wood species.

3. Most Commonly Burned Wood Species.
* Percentages from 28 sample sites that use wood stoves as their primary heat source.

4. Procedure Prior to testing- During test period- After test period-
same wood source, cleaned EPA certified test stoves, set DustTrak location, questionnaire
During test period-
burned duration of test period, documented wood stove and house related activities
After test period-
recorded minimum, maximum, average PM2.5 level, T-Tests, compared house to itself

5. Combined PM2.5 Graph

6. Combined PM2.5 Graph

7. T-Tests Western Larch compared to Douglas Fir:
P Value of DustTrak
P Value of Leland
Douglas Fir to Lodgepole:
P Value of DustTrak
P Value of Leland
Lodgepole to Western Larch:
P Value of DustTrak
P Value of Leland
* P Value ≤ .05

8. Conclusion
Given the information and various test results, there was not enough statistical evidence to support the hypothesis.

9. Improvements/ Changes
Better effort to limit household variables
Greater sample size
Measure density (soft wood vs. hard wood)/ moisture content of samples
Measure outdoor PM levels produced from chimney
Correlation between homes with wood stoves and respiratory problems?

10. Questions?