Last December in this column I took a look at radon testing – what products are used to measure radon concentrations and how they work. In this column, I'll cover a few of the widely ranging specialized products used for radon mitigation (eliminating radon from buildings). For each type of product, I will briefly describe what it does and how it's used, ten I'll provide a sampling of actual products on the market, with brief descriptions where needed. More specific information can be obtained from the manufacturers or suppliers (addresses and phone numbers are listed). Sub-slab and Basement Wall Ventilation Equipment A frequently recommended procedure to reduce high radon levels is to depressurize the area under the slab. A section of