As of 2015, the average price range for radon fan systems is between $800 and $1,200. Installations for homes that have spaces underneath their floorboards or finished lower levels may be more costly, and some of the most expensive systems cost close to $2,000.
Once installed, running the radon fan costs homeowners about as much money as leaving a light bulb on for an entire day. As of 2015, this amounts to less than $100 per year, according to Radon Repair. In a new home, the contractor needs to pre-install mitigation fan components to lower future expenses. Homeowners can invest in sealing systems to optimize the efficiency of their radon fans.