multifamily radon testing
https://gethudradontestingmag.focalledger.com/posts/what-property-managers-should-know-about-hud-radon-testing-requirements
Radon testing in a multifamily building can feel trickier than in a single home—not all units might have the same foundation or airflow. Some neighbors may be dealing with a hidden problem while others are fine. Landlords should coordinate testing across shared spaces and individual apartments during the colder months, because radon levels can spike when windows are sealed shut.