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A standard wind tunnel design for measuring gas fluxes from area sources is needed. This paper documents an attempt to design and test such a wind tunnel. Key parameters evaluated were tunnel wind speed, horizontal and vertical velocity profiles, and filter efficiency. Bulk speed in the wind tunnel can be varied between 0.1 and 1.2 m/s. The velocity profiles in the tunnel are fairly uniform and consistent. The activated charcoal filter on the inlet side of the wind tunnel reduced odor up to 85%, ammonia by 99% and hydrogen sulfide by 99%. Limited data on VOC reductions showed up to 100% reduction in some compounds but increases in other compounds.