They are great for reacting to bad air quality (like wildfires), but are way too loud for normal use. I have an Awair and did that dance of turning on the box

They are great for reacting to bad air quality (like wildfires), but are way too loud for normal use. I have an Awair and did that dance of turning on the box fan filter when levels were higher than normal, then turning it back off once in normal range. Now I much prefer keeping a quieter (less performant unit) on continuously to keep the levels low.