Home Air Purification for Eosinophilic COPD

The intervention is the placement of active HEPA air purifiers in the bedroom and living room of the true air purifier arm. These air purifiers have been shown to reduce levels of particles in the home.

The intervention is the placement of sham HEPA air purifiers in the bedroom and living room. These purifiers look identical to real HEPA air purifiers, but do not filter the air.