While inspecting a house in a neighborhood of slab homes I discovered what appeared to be a radon mitigation system on the neighbors house which is about 10’ from the one I inspected. I know that being in the neighbors house does not mean it’s in the house I inspected. I do not perform radon test. I have studied it and have put getting certified on the back burner. The Indiana State Licensing Board requires a statement on my report that the report does not address environmental issues such as radon. Now that I have seen this I feel the buyers should know and want to do the right thing. Besides what if after they move in and then ask the neighbors what the pipe with the fan is doing sticking out of their house? Any suggestions?