Amaircare Website - 4000HV Airwash Model Airwash Whisper 675 ... Generally speaking, the more air changes per hour (ACH) you can provide, the more effective a HEPA filter can be.
Urban Dictionary: air wash Jimmy and I got so shitfaced at happy hour last night that I had to crash at his place around the corner. I didn't have time to drive home, so I had to do an air wash ...