Matt and Peter have designed the experiments for validating three selected fuel moisture content (FMC) models. Winter weather means that there is currently not enough variation to FMC for field validation. We are therefore planning a preliminary experiment on a fuel and soil sample in a growth chamber. In the growth chamber, the environmental conditions can be artifically controlled. The experiment will vary the temperature, humidity, light, and wind speed condi- tions inside the chamber. One RISERnet mote in the chamber will then monitor the environmental condi- tions. Hourly changes to FMC will be measured using the FMC meter. The chamber validation will then help supplement the subsequent field validation, giving useful information about the performance of the different models in a controlled environment.