Wall-Mounted ERV with PM2.5 Sensor – Advanced Air Quality Management This wall-mounted ERV with a PM2.5 sensor guarantees clean, healthy air by filtering fine PM2.5 particles and automatically adjusting ventilation. It enhances indoor air quality, conserves energy, and offers efficient heat and humidity control, making it ideal for both residential and commercial environments https://www.holtopcanada.com/product-page/pm2-5-sensor-version-wall-mounted-erv