There seems to be a lot of confusion around viable sampling and when its appropriate to collect viables. The most common sampling method is the non-viable sampling method. I use Allergenco D sporetrap cassettes, on a buck pump calibrated to 15 liters per minute for 5 minutes. During the 5 minute sample, 75 liter of air pass through the cassette, where airborne particles are impacted on an internal slide that is coated with an adhesive substance. I send them off to a lab where a mycologist opens up the cassette and looks at the slide to see what stuck in the adhesive.
