I am certified as a residential radon measurer and I use Sun Nuclear Radon Monitors so I get your results 48 hours after setting the unit. I strongly recommend having radon testing in every residential purchase. According to the EPA, radon can cause lung cancer. If the monitor reading is 4.0 Pic/L or higher then repair is needed in a real estate transaction. This is an added cost. To get in touch about radon testing, head over to the contact page to request an inspection.