radon alarm 5

https://foxtrot-wiki.win/index.php/What_to_Expect_During_a_Radon_Fan_Installation

The radon alarm sits quietly in the basement corner, its small digital screen displaying a steady reading. It's not the most exciting gadget, but knowing it will chirp if the invisible radioactive gas creeps above safe levels brings a certain peace of mind. I check it every few days, mostly out of habit, grateful for that silent vigilance.