Just wanted you to know our WAVE has been installed for 2 weeks, and it has made an excellent difference in air quality in the house. The installer had no trouble putting it in, including cutting a circular hole in the wall of the house. It is quiet and unobtrusive, so you’d never know it was there, except for the air cleaning it does. Thanks for your recommendation. I hope you gave some credit to Joan and Neil Nicolay who referred us to your company.