At the risk of steering this discussion off topic, I received a question asking if radon can build up in continuous radon monitors and become a radiation source within the home/office that they are stored in. Example being if there were 5 or 10 monitors in one spot. I understand background checks are important as part of the calibration process because of possible build up (of RDP I am guessing?) but I assume that cannot realistically build up to levels high enough to be a health concern? Taking this concept one step further, the discussion above brought up disposal of filters being a possible concern, so could RDPs build up enough in radon fan blades to a high enough degree that their disposal would ever become an issue, or at least something you wouldn't want sitting in your office/shop? Surely there would be plating out on those fan blades? I am pretty sure I was taught years ago that the pipe and fan would not be a health concern when modifying a very old system, so is it the surface area of the filter media that allows the HEPA filter disposal to be a possible concern? Any correction of my assumptions from the scientific folks in the audience would be appreciated.

Thanks Kevin. That makes me feel better knowing that I didn't kill off a lot of pollinators!

Bill inspired me with his innovation. I had to pull a stinger out of my son’s neck last week after he ventured too close to the ground bee nest in an old retaining wall next to my shop. We took revenge tonight! Not quite as impressive of a count, but it only ran for about an hour before it got dark. And no I don’t want to hear about putting an old HP220 on a 3” pipe. It is what I had sitting in the shop! At least I used a white coupling...