The two-dimensional, transient numerical model of heat and water vapor convection and diffusion during air exfiltration within fiberglass insulation, presented in Part /, is validated in Part II, with experimental data for temperature, moisture and frost accumulation, and heat flux. With a few exceptions, the simulation results and experimental data agree within the experimental uncertainty. Exfiltration airflow in the two-dimensional space showed strong entrance and exit effects for temperature, moisture and frost accumulation, and heat flux on the cold side.