I reached out to Mark of Simon Air Quality after I had tested by basement (where my office is located) for Radon. Radon levels were recorded over 200, which by Health Canada standards, requires a Radon Mitigation System. Mark was able to come quickly and evaluate our home for a suitable location to install the system. The next day, I had a quote for installation. Marc came to install the system as scheduled. He, and the other installer (Yves) did a great job. Took them about 3 or 4 hours total. They cleaned up after themselves before leaving, and Radon levels have been dropping steadily since. I've gone from a reading of 200, to an average of 3-4. Very happy with the outcome.