For example, a sub-slab piping system can be installed when the foundation is being built. If measured radon levels in the finished house are high, it will be a simple matter to hook up a suction fan to the piping. If radon levels are low, the system won't be necessary, and the sub-slab piping will remain unused. The expense should be considered low cost insurance. Do install a ventilation system People need fresh air.
Mechanical ventilation can supply that air at the correct rate whenever it is required.
Relying on infiltration for the occupants' air supply is unreliable at best and, more often than not, insufficient. The different systems have various advantages and disadvantages, but all can provide the occupants with fresh air. The finish has very high emissions for 6-12 months, after which levels decrease significantly. The emissions from the formaldehyde base glues have half lives of several years. Do use water based adhesives, caulks, paints, etc.