I just want you to know how effective AspenAir is at removing smoke from the air. A few nights ago we were sleeping with the windows open and the air system was off. In the middle of the night I awoke smelling smoke (from what I later learned was a huge fire east of Napa) and my wife and I were becoming congested. I closed all the windows and turned on the system fan.  In about an hour the air in the house was clean and fresh. I continue to circulate the interior air through the filter whenever smoke from fires drifts our way. Thanks again for a great filter.
Regards.