Computational modeling in ASHRAE applications requires a level of confidence in the results. This presentation looks at a Verification and Validation of a surface condensation CFD model. The V&V was comprised of a comprehensive procedure for minimizing errors and comparing simulations to a benchmark experiment. The analysis is an assessment of the numerical uncertainty derived from a grid convergence study, an input analysis, a report of experimental uncertainty, and source of unqualified modeling. The total validation uncertainty is calculated for three measured parameters. Simulation results were found to match experimental data within the uncertainty of the validation.