Q: I recently bought a ground-floor condominium in New Haven County, Conn. A radon test performed as part of the inspection showed elevated levels. I got an estimate for a subslab pressurization system that would have to be installed in the crawl space and vent out. The homeowners’ association president refused to install it, or allow me to pay to have it installed, and I was told that the proximity of the unit to a body of water would create structural issues.    Read the Q&A………………………………..